“It’s not nice to fool Mother Nature!”
“No difference!”
“Par-ka-ay!”
“These are cola nuts. They grow here.”
(This might have not gone farther than the Mid-Atlantic)
“Milk and butter and eggs and cheese
Fresh from the farm to you.
So, if you don’t own a cow
Call Cloverland, now
It’s NOrth 9-2222.”
Come to Jamaica! Again and again.
“Wouldn’t you really rather have a Buick?”
“It’s spoiled again!” :mad:
After 5,… After 5, …bargain rates begin
“Now it smells like fish and roses!”
“Ancient Chinese Secret”
“I can bring home the bacon, fry it up in a pan
And never ever let you forget you’re a man”
“Brylcreem, a little dab’ll do ya!
Brylcreem, you’ll look so debonair!
Brylcreem, the gals’ll all pursue ya!
They’ll love to run their fingers through your hair!”*
“Us Tareyton smokers would rather fight than switch!”
*“You’ll wonder where the yellow went
when you brush your teeth with Pepsodent!”
*
"Men! Take it off! Take it **all off!"
*Yeccch! 
**Ooooh, yeah! :o
Let your fingers do the walking
Coffee? Tea? Or a flick of my Bic?
They’re GRRRrrreat!
This is your brain on drugs. Any questions?
How do YOU spell relief?
We make money the old fashioned way.
When E F Hutton speaks, people listen
Does she, or doesn’t she?
I saw the above on the wall of a toilet stall at a Boston university.
My best (or worst): Makes you look like you’re not wearin’ nothin’!
“Only her hairdresser knows for sure!”* 
*Nudge, nudge! Wink, wink! Say no more!
Wow this brings back memories…but I can’t for the life of me think of the product.
“Time to make the donuts” “I made the donuts”
“Well I Guess I won’t be needing these anymore”/“They’re even better than YOURS Wanda”
“N-E-S-T-L-E-S Nestle makes the very best”
“There’s more in the middle of an egg mcmuffin than an egg in the middle of a muffin”
“Pardon Me…do you have any Grey Poupon”
“I know its a lotta tea…but which tea is it?”
I can’t think of the slogan…but I remember the guy dreaming he is skiing after biting into a York Peppermint Patty
^ Mother Nature – Imperial margarine
York Peppermint Patty – Get the sensation
Some of the first I remember from radio:
Rinso white, Rinso bright, happy little washday song!
So round, so firm, so fully packed, so free and easy on the draw.
It’s kind to your T-zone
Good to the last drop!
Halo, everybody, Halo
L-A-V-A! L-A-V-A!
Look sharp, feel sharp, be sharp
…won’t keep going on into the 50’s, they begin to run together. (Yeah, I’m one of your older Dopers.)
William Shatner, plugging margarine in the '70s: “I promise!”*
“No difference!” was, IIRC, for Blue Bonnet margarine:
“We asked five French chefs if they could tell the difference between a souffle made with butter and one made with Blue Bonnet margarine.”
[GALLIC SHRUG] “No difference!” Repeat five times.
***Promise **was the name of the brand.