# Does Using Fog Lights/Other Electrical Accesories On Your Car Reduce Mileage Significantly? **URL:** \ **Category:** Factual Questions\ **Created:** [December 19, 2011, 2:57am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703 "2011-12-19T02:57:54Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![jz78817](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jz78817/32/1028_2.png) [@jz78817](https://boards.straightdope.com/u/jz78817)\ **Post date:** [December 22, 2011, 3:21am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/41 "2011-12-22T03:21:16Z")
> [@FoieGrasIsEvil](#): > > What about the people that buy vehicles with HID lights that blind everyone without the use of fog lights? They don’t have a choice as to what lights to use. factory HIDs have projector lenses, not reflectors, so it’s a moot point. people who stick HID capsules in reflector housings designed for halogen bulbs are assholes. > [@](#): > > Doesn’t magnesium react pretty violently with water? I’m pretty sure it does. Hence the comment although I didn’t really believe the firefighter about the Fiero engine block. Even GM wouldn’t be so lame as to use that metal to construct an engine block for mass production. no it does not. the frame of your steering wheel is cast magnesium. The core support that surrounds the radiator of your car and locates the headlamps is cast magnesium. Some cars have the frame of the dashboard made from cast magnesium. Magnesium does burn extremely hot with a blinding white flame, but you have to get it really really hot first. > [@](#): > > Maybe that’s it…but I think its more of a combination of the two separate sets of light working in concert…the fog lights in normal darkness give me extra light for what’s immediately in front of me, combined with the headlights on normal beam giving me distance view. In my mind one doesn’t interfere with the other…they work together. it’s most likely not hurting anything to have them on, but the thing to consider is that the fog lights don’t project very far in front of your car. If anything pops up that the fog lights illuminate that the headlamps don’t, you’re not going to have time to react anyway. ---
**Author:** ![Rick](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@Rick](https://boards.straightdope.com/u/Rick)\ **Post date:** [December 22, 2011, 3:29am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/42 "2011-12-22T03:29:48Z")
> [@FoieGrasIsEvil](#): > > Doesn’t magnesium react pretty violently with water? I’m pretty sure it does. Hence the comment although I didn’t really believe the firefighter about the Fiero engine block. Even GM wouldn’t be so lame as to use that metal to construct an engine block for mass production. From [Wiki](http://en.wikipedia.org/wiki/Magnesium) > [@](#): > > The free element (metal) is not found naturally on Earth, as it is highly reactive (though once produced, it is coated in a thin layer of oxide [see passivation], which partly masks this reactivity)… Commercially, the chief use for the metal is as an alloying agent to make aluminium-magnesium alloys, sometimes called “magnalium” or “magnelium”. Since magnesium is less dense than aluminium, these alloys are prized for their relative lightness and strength… > Elemental magnesium is a fairly strong, silvery-white, light-weight metal (two thirds the density of aluminium). It tarnishes slightly when exposed to air, although unlike the alkali metals, storage in an oxygen-free environment is unnecessary because magnesium is protected by a thin layer of oxide that is fairly impermeable and difficult to remove. Like its lower periodic table group neighbor calcium, magnesium reacts with water at room temperature, though it reacts much more slowly than calcium. When submerged in water, hydrogen bubbles will almost unnoticeably begin to form on the surface of the metal, though if powdered it will react much more rapidly. The reaction will occur faster with higher temperatures (see precautions)… > An unusual application of magnesium as an illumination source while wakeskating in 1931 > > Magnesium is the third most commonly used structural metal, following iron and aluminium. It has been called the lightest useful metal by The Periodic Table of Videos.[12] > > The main applications of magnesium are, in order: component of aluminium alloys, in die-casting (alloyed with zinc),[13] to remove sulfur in the production of iron and steel, the production of titanium in the Kroll process.[14] > > Magnesium, in its purest form, can be compared with aluminium, and is strong and light, so it is used in several high volume part manufacturing applications, including automotive and truck components. Specialty, high-grade car wheels of magnesium alloy are called “mag wheels”, although the term is often more broadly misapplied to include aluminum wheels. In 1957, a Corvette SS, designed for racing, was constructed with magnesium body panels. An earlier Mercedes-Benz race car model, the Mercedes-Benz 300 SLR, had a body made from Elektron, a magnesium alloy; these cars ran (with successes) at Le Mans, the Mille Miglia, and other world-class race events in 1955 (though one was involved in the single worst accident in auto racing history, in terms of human casualties, at the Le Mans race.) Porsche’s all-out quest to decrease the weight of their race cars led to the use of magnesium frames in the famous 917/053 that won Le Mans in 1971, and still holds the absolute distance record. The 917/30 Can-Am car also featured a magnesium frame, helping it to make the most of its prodigious 1100–1500 hp. Volkswagen Group has used magnesium in its engine components for many years. For a long time, Porsche used magnesium alloy for its engine blocks due to the weight advantage. There is renewed interest in magnesium engine blocks, as featured in the 2006 BMW 325i and 330i models. The BMW engine uses an aluminium alloy insert for the cylinder walls and cooling jackets surrounded by a high-temperature magnesium alloy AJ62A. The application of magnesium AE44 alloy in the 2006 Corvette Z06 engine cradle has advanced the technology of designing robust automotive parts in magnesium. Both these alloys are recent developments in high-temperature low creep magnesium alloys. Mitsubishi Motors also uses magnesium (branded magnesium alloy) for its paddle shifters. The general strategy for such alloys is to form intermetallic precipitates at the grain boundaries, for example by adding mischmetal or calcium.[15] New alloy development and lower costs, which are becoming competitive to aluminium, will further the number of automotive applications Ever hear of Mag wheels? 🙂 Alloys, they don’t use pure Magnesium. ---
**Author:** ![jz78817](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jz78817/32/1028_2.png) [@jz78817](https://boards.straightdope.com/u/jz78817)\ **Post date:** [December 22, 2011, 3:33am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/43 "2011-12-22T03:33:18Z")
missed the edit window: > [@FoieGrasIsEvil](#): > > Even GM wouldn’t be so lame as to use that metal to construct an engine block for mass production. I guess [Porsche](http://en.wikipedia.org/wiki/Porsche_911_classic#2.0-litre_.2F_O.2C_A_and_B_series_.281964.E2.80.931969.29) and [BMW](http://en.wikipedia.org/wiki/BMW_3_Series_(E90)#E46_comparison) are lame, then. ---
**Author:** ![FoieGrasIsEvil](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/foiegrasisevil/32/16638_2.png) [@FoieGrasIsEvil](https://boards.straightdope.com/u/FoieGrasIsEvil)\ **Post date:** [December 22, 2011, 3:42am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/44 "2011-12-22T03:42:46Z")
I guess I am confusing something here WRT magnesium v magnesium alloys. I vaguely recall strips of (pure?) magnesium in a science kit I had as a lad that boiled water furiously when introduced to it. ---
**Author:** ![jz78817](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jz78817/32/1028_2.png) [@jz78817](https://boards.straightdope.com/u/jz78817)\ **Post date:** [December 22, 2011, 3:53am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/45 "2011-12-22T03:53:37Z")
> [@FoieGrasIsEvil](#): > > I guess I am confusing something here WRT magnesium v magnesium alloys. I vaguely recall strips of (pure?) magnesium in a science kit I had as a lad that boiled water furiously when introduced to it. magnesium, like aluminum, is actually quite reactive. however, both form a protective oxide layer almost instantly upon being exposed to air. **ETA:** in chemistry classes, we had demonstrations of stuff like this with metallic sodium, lithium, and potassium. They went batshit when placed in water. ---
**Author:** ![DrDeth](https://avatars.discourse-cdn.com/v4/letter/d/b487fb/32.png) [@DrDeth](https://boards.straightdope.com/u/DrDeth)\ **Post date:** [December 22, 2011, 3:54am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/46 "2011-12-22T03:54:13Z")
> [@FoieGrasIsEvil](#): > > I guess I am confusing something here WRT magnesium v magnesium alloys. I vaguely recall strips of (pure?) magnesium in a science kit I had as a lad that boiled water furiously when introduced to it. That was more likely Sodium (perhaps Potassium)- Magnesium does burn very hot, but not on contact with water. ---
**Author:** ![Telemark](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/telemark/32/372_2.png) [@Telemark](https://boards.straightdope.com/u/Telemark)\ **Post date:** [December 22, 2011, 3:56am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/47 "2011-12-22T03:56:51Z")
> [@Reply](#): > > Wow, I never knew there was actually such a thing as “fog lights”. I thought that was just an antiquated name for high beams. > > Does that mean there’s a separate switch/lever somewhere that controls the fog lights independently of the regular headlamps and high beams? Fog lights are separate lights, mounted low on the car. On my car (Subaru Outback) there is a switch on the dash for turning them on. Turning on the high beams deactivates the fog lights since there is no scenario where you want the high beams AND the fog lights on at the same time. If it is foggy, the high beams will reflect off the fog and reduce your visibility dramatically. > **[Automotive lighting](https://en.wikipedia.org/wiki/Automotive_lighting#Auxiliary_lamps)** > > Automotive lighting is functional exterior lighting in vehicles. A motor vehicle has lighting and signaling devices mounted to or integrated into its front, rear, sides, and, in some cases, top. Various devices have the dual function of illuminating the road ahead for the driver, and making the vehicle visible to others, with indications to them of turning, slowing or stopping, etc., with lights also indicating the size of some large vehicles. > Many emergency vehicles have distinctive lighting ... ---
**Author:** ![Throatwarbler\_Mangrove](https://avatars.discourse-cdn.com/v4/letter/t/8c91f0/32.png) [@Throatwarbler\_Mangrove](https://boards.straightdope.com/u/Throatwarbler_Mangrove)\ **Post date:** [December 22, 2011, 4:19am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/48 "2011-12-22T04:19:03Z")
> [@FoieGrasIsEvil](#): > > What about the people that buy vehicles with HID lights that blind everyone without the use of fog lights? They don’t have a choice as to what lights to use. OEM HIDs don’t blind anyone. Automotive lights are extremely tightly regulated by the relevant transportation authorities in every developed country and auto makers spend massive amounts of money making sure their lights don’t blind people. If your car’s instructions tell you not to use foglights when there 's no fog then you should follow those instructions. In most European countries using foglights when there’s no fog out is illegal. > [@](#): > > factory HIDs have projector lenses, not reflectors, so it’s a moot point. people who stick HID capsules in reflector housings designed for halogen bulbs are assholes. HID usually only refers to the type of bulb and it is possible to have a reflector type HID headlight. Late 90s luxury cars like those jellybean Lincoln Mark VIIIs and Acura RLs had them. The bits of magnesium alloy landing gear on planes will burn right through the deck of an aircraft carrier, I’ve been told. ---
**Author:** ![Hail\_Ants](https://avatars.discourse-cdn.com/v4/letter/h/dc4da7/32.png) [@Hail\_Ants](https://boards.straightdope.com/u/Hail_Ants)\ **Post date:** [December 22, 2011, 4:54am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/49 "2011-12-22T04:54:14Z")
> [@Gary\_T](#): > > Underlining mine. I’m not sure why you said this. The overwhelming majority of engine blocks are cast iron. Most cylinder heads are aluminum (not alloy, as far as I know), but neither aluminum heads nor aluminum blocks have a bearing on not having to warm up the engine. It’s the precise fuel metering that modern fuel injection affords that makes the difference. Ah, no, [the majority are aluminum.](http://wardsauto.com/ar/auto_aluminum_claims_no/) From the linked article: _“Some 85% of North American cars have aluminum engine blocks today, a figure expected to reach 90% penetration within five years…”_ Also, an aluminum engine block has a \*\*huge \*\*bearing on how a car warms up. Aluminum acts as a heat sink and warms both more evenly and \*much \*faster than iron. Also, because pistons are aluminum, when they’re used in an iron block they have to be made smaller (i.e. looser) than the block’s cylinder bore to allow for the significantly greater heat expansion ratio of aluminum vs. iron. This means that until the iron engine block & aluminum pistons both come up to temperature and expand the engine runs much poorer. Oh, and as far as fog lights are concerned, they’re strictly for looks. Yeah, they do work better in fog, but nobody gives a shit about that. They’re available & desired on American cars because they look cool. ---
**Author:** ![Muffin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/muffin/32/4341_2.png) [@Muffin](https://boards.straightdope.com/u/Muffin)\ **Post date:** [December 22, 2011, 5:08am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/50 "2011-12-22T05:08:49Z")
If you are driving at low speed, then yes, fog lights will help you see more when added to driving lights. If you are driving at speed, you will be outrunning your fog lights, so they will be useless, leaving you entirely dependant of your driving lights despite both fog and driving lights being on at the same time. As has already been pointed out, if you use both at the same time your pupils will adjust to the brighter light, and you will not see as well further down the road where the light is dim. ---
**Author:** ![jz78817](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jz78817/32/1028_2.png) [@jz78817](https://boards.straightdope.com/u/jz78817)\ **Post date:** [December 22, 2011, 5:12am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/51 "2011-12-22T05:12:51Z")
> [@Hail\_Ants](#): > > Also, an aluminum engine block has a \*\*huge \*\*bearing on how a car warms up. Aluminum acts as a heat sink and warms both more evenly and \*much \*faster than iron. Also, because pistons are aluminum, when they’re used in an iron block they have to be made smaller (i.e. looser) than the block’s cylinder bore to allow for the significantly greater heat expansion ratio of aluminum vs. iron. except most engines with aluminum blocks still have iron cylinder liners. care to try again? > [@](#): > > This means that until the iron engine block & aluminum pistons both come up to temperature and expand the engine runs much poorer. _sigh_ you kids don’t have the faintest clue about how shitty engines used to run when cold. ---
**Author:** ![Muffin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/muffin/32/4341_2.png) [@Muffin](https://boards.straightdope.com/u/Muffin)\ **Post date:** [December 22, 2011, 5:14am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/52 "2011-12-22T05:14:10Z")
> [@Hail\_Ants](#): > > Oh, and as far as fog lights are concerned, they’re strictly for looks. Yeah, they do work better in fog, but nobody gives a shit about that. Speak for yourself on that one. I drive in fog and in snowstorms a fair bit, and greatly appreciate having fog lights that let me continue on my trips (albeit slowly) rather than having to stop due to the reflected glare from my driving lights. ---
**Author:** ![Rick](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@Rick](https://boards.straightdope.com/u/Rick)\ **Post date:** [December 22, 2011, 5:19am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/53 "2011-12-22T05:19:22Z")
> [@Hail\_Ants](#): > > Also, an aluminum engine block has a \*\*huge \*\*bearing on how a car warms up. Aluminum acts as a heat sink and warms both more evenly and \*much \*faster than iron. Also, because pistons are aluminum, when they’re used in an iron block they have to be made smaller (i.e. looser) than the block’s cylinder bore to allow for the significantly greater heat expansion ratio of aluminum vs. iron. This means that until the iron engine block & aluminum pistons both come up to temperature and expand the engine runs much poorer. About 1/2 right. From an emission point of view aluminum is the perfect material heats up quick and throws off heats easily. But from a longevity point of view aluminum is horrible. Anybody recall the original Vega engine? Pistons really like to run in cast iron. Great longevity excellent sealing. What a number of car makers (if not all) are doing is casting a cast iron liner around each cylinder that is a few mm thick. This allows for the best of both worlds, the piston is happy running in cast iron, and the balance of the block is aluminum for its advantages with emissions. ---
**Author:** ![steronz](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/steronz/32/11765_2.png) [@steronz](https://boards.straightdope.com/u/steronz)\ **Post date:** [December 22, 2011, 5:28am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/54 "2011-12-22T05:28:03Z")
> [@Muffin](#): > > Speak for yourself on that one. I drive in fog and in snowstorms a fair bit, and greatly appreciate having fog lights that let me continue on my trips (albeit slowly) rather than having to stop due to the reflected glare from my driving lights. Yeah, and one time that guy really needed AWD to get up that hill when it snowed, so that rationalizes every AWD car ever sold to anybody anywhere. Look at every trim level for every car available today, and you’ll notice that fog lights are absent or optional on base models and standard on premium models. (See OP, who has the GT model that came standard with the V8 and fog lights, as opposed to the lowly V6 model that had to get supplemental fog lights from _gasp_ Autozone.) Sales of fog lights are not localized to foggy areas, and 90% of the cars that have them drive around with them on 24/7 (see OP) just to let everyone else know that they could afford them in the first place. I’m not discounting your personal need for them, but if you’re being honest, then you’re 1 in a thousand, and you’re not the driving force behind sales of fog lights. ---
**Author:** ![jz78817](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jz78817/32/1028_2.png) [@jz78817](https://boards.straightdope.com/u/jz78817)\ **Post date:** [December 22, 2011, 5:29am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/55 "2011-12-22T05:29:04Z")
> [@Rick](#): > > About 1/2 right. From an emission point of view aluminum is the perfect material heats up quick and throws off heats easily. this is true for the cylinder heads; the '90s GM LT1 used aluminum heads combined with reverse-flow cooling to ratchet up compression ratios and improve efficiency. > [@](#): > > But from a longevity point of view aluminum is horrible. Anybody recall the original Vega engine? the 2300 was torpedoed by it’s woefully inadequate cooling system. warping of the open-deck block was what killed Vega engines, not the liner-less cylinders. Porsche and BMW have used nikasil alloys to cast linerless aluminum blocks. > [@](#): > > Pistons really like to run in cast iron. pistons don’t give a shit so long as they’re designed properly for the engine block design and material. ---
**Author:** ![Muffin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/muffin/32/4341_2.png) [@Muffin](https://boards.straightdope.com/u/Muffin)\ **Post date:** [December 22, 2011, 5:31am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/56 "2011-12-22T05:31:39Z")
Canadian North Shore of Superior. Lots of fog. Lots of snow. Lots of distance between towns where one can stop for the night. Fog lights are the shiznits for these conditions. Same goes for four wheel drive when the winter storms hit around here. ---
**Author:** ![Malacandra](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@Malacandra](https://boards.straightdope.com/u/Malacandra)\ **Post date:** [December 22, 2011, 7:41am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/57 "2011-12-22T07:41:00Z")
> [@DrDeth](#): > > That was more likely Sodium (perhaps Potassium)- Magnesium does burn very hot, but not on contact with water. Yup, when we did the experiment in class we cleaned up the magnesium with emery cloth and it made bubbles really slowly with cold water, way less exciting than any of the alkali metals. You could run hot steam over magnesium ribbon and get a quick enough reaction to make a steady stream of hydrogen to burn off, but it’s small beer next to dropping a chunk of sodium in water and the magnesium itself doesn’t do anything interesting - you need to ignite it in air, or pure oxygen for choice, to get the blazing white flame. Also, this is thin ribbon. A big chunk of metal is going to be less reactive still (less surface area per unit volume). All of the above said, I doubt any high-street chemistry kit had sodium metal in it. :dubious: ---
**Author:** ![Hail\_Ants](https://avatars.discourse-cdn.com/v4/letter/h/dc4da7/32.png) [@Hail\_Ants](https://boards.straightdope.com/u/Hail_Ants)\ **Post date:** [December 22, 2011, 9:07am UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/58 "2011-12-22T09:07:45Z")
With regard to fog lights- The last three vehicles I’ve had all had OEM fog lights. Thing is, they all _ **only came on with the headlights** _. Yes, they had a separate switch, but it was wired after the main headlight circuit. So you could never use just the fog lights. I’m assuming its a safety issue, so people don’t mistake their fog lights for their headlights. But it also means they can’t really ever work as fog lights. So the only real reason car makers include them is aesthetics (i.e. they look cool!) And in all my cars that had them I’ve turned the fog light switch on and just left it there. In dusk & dawn driving they do more than look cool, they make your vehicle more visible to other drivers. But mostly, they just look nice. And they have no effect on oncoming traffic, they’re not bright enough. ---
**Author:** ![Muffin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/muffin/32/4341_2.png) [@Muffin](https://boards.straightdope.com/u/Muffin)\ **Post date:** [December 22, 2011, 12:02pm UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/59 "2011-12-22T12:02:54Z")
> [@Hail\_Ants](#): > > So you could never use just the fog lights. I’m assuming its a safety issue, so people don’t mistake their fog lights for their headlights. But it also means they can’t really ever work as fog lights. So the only real reason car makers include them is aesthetics (i.e. they look cool!) Yes, those certainly are decorative only. I don’t think that means that the only real reason car maker include thims is aesthetics. Your car maker for your model, certainly yes. But there are others (such a mine), where they are functional as opposed to only being decorative. ---
**Author:** ![Muffin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/muffin/32/4341_2.png) [@Muffin](https://boards.straightdope.com/u/Muffin)\ **Post date:** [December 22, 2011, 12:29pm UTC](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703/60 "2011-12-22T12:29:22Z")
Sorry about the spelling – just waking up. Once my brain starts working I’m hitting the road for a six hour drive along part of the top of Lake Superior. Yippee! [Previous page](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703.md?page=2) [Next page](https://boards.straightdope.com/t/does-using-fog-lights-other-electrical-accesories-on-your-car-reduce-mileage-significantly/606703.md?page=4)