Yes, every 5k miles. In all three of our cars.
I do it myself in my driveway, in the garage is the weather is bad.
I only use Mobil One synthetic, so it’s cheaper for me to buy the oil myself. I like to get under the car and see what’s going on with my own two eyes so I can spot issues before they become problems. I only take my car to a shop for annual inspections and for things that I can’t do myself or with the help of a friend.
1: I run a 5,000 mile change interval. Iffy Lube’s perpetrated a myth that our cars will explode if we don’t change the oil every 3,000 miles. I can’t say this often or loud enough: Follow the recommendations in the owner’s manual.
2: Neither. I get free oil changes for life from the dealer.
3: It’s free, and they will know the tricky points such as the engine takes eight quarts of 5w10 synthetic. I wouldn’t trust Iffy Lube to know this, plus the dealership gives me a free wash most of the time. All I’d expect out of Iffy Lube is five quarts of 10w30 dino and fingerprints at no extra charge.
Can I do my own oil changes? Certainly. I’ve done dozens of oil changes in the past. But, thanks to the dealership’s generosity, I don’t have to. (Yes, I’m sure the cost is built into the purchase price, but other dealerships around here don’t offer lifetime changes for free)
Why are you being so mean to them? All that stands between a long life and a painful grinding death for your mower and generator is one quart of oil and no water cooling. The oil, and airflow around the engine, is all that cools the thing. Plus, you’re pouring in all of the contamination that the car’s oil has acquired.
1. Do you change your oil regularly?
Yes, every 3000-6000 miles.
2. Do you do it yourself or pay to have it done?
I’ve been driving for 20 years and have always paid: these days I go to either Jiffy Lube or Goodyear, depending on my schedule and what else might need to be done to the car at the time.
3. Why do you do whatever you do in #2?
No one in my family is mechanically inclined, so I never learned anything about cars. Plus, I’ve lived in apartments and townhouses (no garage, no driveway) for the past 13 years. A couple of years ago I watched a friend change his oil and I learned that it can be done in a parking lot, but I just don’t care enough to start doing it myself.
Aside to Small British Shop Owner (welcome to the board!): Are you a small Briton who owns a shop, or do you own a small British shop? 
As far as disposing of the used oil and filters, I pour the dirty oil back into the empty quart containers and take them plus the filter over to the recycle center (3 blocks away), they have a dropoff point for all that stuff.
Yes. Every 3000 miles (rounded of to the nearest weekend).
I do it myself.
Two reasons: One, I’m a better mechanic than most of the whippersnappers working at the oil change places. Two, it gives my the chance to check other stuff, like other fluid levels, belts, look for leaks, etc. I like the peace of mind of knowing first hand that stuff is in working order. I know the quick-change places say that they do this, but I’ve observed otherwise.
Do you change your oil regularly?
Well, I try to on the 9,000 mi interval that is recommended for my car, but sometimes I am a little late. I have a small leak and find myself topping it off inbetween changes, though.
Do you do it yourself or pay to have it done?
I pay to have it done.
Why do you do whatever you do in #2?
Mainly, because I find it difficult to dispose of used oil. My town’s recycle center is only open during business hours which I am obviously busing working during. I have a three month old bowl of oil sitting in my garage from when I changed my lawnmower’s oil this spring.
Also, it’s like $25, an expense I can easily afford twice a year. With gas prices the way they are, it is probably cheaper to NOT drive to the recycle center and have the oil changed at the Lube Stop that is right on my normal commute anyway.
Yes, the manufacturer recommends every 20K and requires it be Mobil 1. I do it every 10K.
I pay. While I used to do it myself when I was young, there’s really no benefit to that now.
I was learning about cars then. Now I’ve other interests. It requires a specialty filter, it only takes 30 minutes at a place I trust on the way home, and I’m not interested in tracking down a means of disposing of the used oil safely. They charge me $105, a whole lot less than the dealer’s $180. When I checked their invoice, $98 was for materials and only $7 was for labor. Shoot, I’d charge myself more than $7 for the work. They’ll check the other levels and even wash it for me. It’s just the most practical way.
I figure the engines are designed to take all sorts of abuse.
To Misnomer: The latter. If you can see my contributions (and can you?) then I’ve fielded some questions about the shop.
Despite what the Service Department might tell you, you will not violate your warranty by doing your own scheduled maintenance, unless explicitly specified (as it is on newer Porsches and most if not all hybrid vehicles).
Like Duke of Rat, I’ve had a couple of really bad experiences with quick change places–both incompetent maintenance and fraudulent attempts to “upsell” me on unneeded or worthless services, so:[ol][li]Yes, in accordance with the schedule in the operator’s manual,[]I change it myself, an almost trivial operation on the intelligently designed car I drive, and []For reasons stated above.[/ol][/li]
Stranger
Do you change your oil regularly?
Yes.
Do you do it yourself or pay to have it done?
Do it myself.
Why do you do whatever you do in #2?
Because I don’t want the drain plug unnecessarily tightened with an ungodly amount of force until the threads eventually strip out of my oil pan, forcing an expensive oil-pan replacement. And Jiffy-Lube WILL over-tighten your drain-plug. There is no question.
P.S. The one time I had a mechanic change my oil, he not only over-tightened the drain-plug, but over-tightened the filter to the point that, the next time I changed the oil, I had to apply so much force to loosen the filter than it dislodged the entire oil-cooler assembly on my engine.
I don’t know anything about cars and wouldn’t know the first thing about how to change my oil or just about anything else. If I really wanted to know, I could ask my brother-in-law to teach me, but I can’t reallyl be bothered. Just not interested.
I’d like to know what the hell you are driving. The only thing I can think of that may have those intervals and prices would be a big rig.
I used to all the time (well, every 5,000 miles), but the last few years I’ve lived in areas/complexes where changing oil or doing any mechanical work in the parking lot or street was not allowed.
If by “contributions” you mean posts, then, obviously, yes, I can see them. If you’re implying that I should have done a search on your user name in an effort to find out the answer to my question before simply asking it in this thread – which is the first and, so far, only time I’ve encountered you – then you’re quite mad. 
Does that mean you’ve stopped doing your own oil changes, or that you’ve stopped doing them entirely? 
Maxx, 4.5 liter Porsche, the Cayenne S. I think it holds a good 6 quarts or so and they mandate the full synthetic, plus their filters ain’t cheap. I’ve checked with several reputable shops. Lowest was $95 and, as mentioned, the dealer is $180.
However, 10K miles (I could easily stretch it to 12K as they max allow 20 even in the Carrera) for $100
vs
3K for $35. w/ conventional oil.
Over the same interval, the price is essentially the same.
I haven’t had a car in years, but changing one’s own oil is pointless. It’s not significantly cheaper than going to a Jiffy Lube.
Here’s one I’ll never forget from Jiffy Lube: I take my truck in for an inspection and oil change. The guy comes in and tells me, “You’re at whatever-K miles, and our computer says you’ve never had your automatic transmission fluid changed, so that’s what I want to do today. It’s important because blah blah blah.”
I stopped his spiel with, “If you can find an automatic transmission in my truck, you go right ahead.” My truck is a stickshift. He said no more and left. The other people in the waiting room appeared to get a snicker out of it, though.
The really interesting thing is, I could swear that the guy who suggested the ATF change was the same guy who drove it into the garage for the inspection. Shouldn’t he have noticed, while he was driving my truck, that there was, you know, a clutch?
This sums it up well, with a pinch of “at the time I was learning to drive/take care of a car, my dad was in the process of switching from doing it himself to paying because dealing with used oil was a hassle.”
I never have, and I don’t know how to do so. I just got a new car (2007 Jeep Wrangler) I’ll have it serviced via the warranty before I do it myself. I don’t want to void the service contract.