So I recently made the switch to synthetic oil. Before the switch I was getting about 17.9mpg to the gallon, and now I'm getting about 22.2mpg, on the 3.4. Is this normal? I haven't changed my driving habits, just the normal to and from work.
jacob

 

nice if only i had 35 bucks for syn

 

How many miles did you have before you switched?

 

No way can synthetic oil make such a difference.

 

averaged about 17.9 before the switch. I've only gone through one tank since the switch, maybe it was a fluke, who knows. I sure hope not though.

 

I have a vw gti, and i switched to synthetic and i progressively have gotten better mpg. I went from 28-29 to a solid reliable 32-33mpg. I am getting a 97 4runner this Friday and one of the things i plan on is running synthetic oil.

 

its cheaper than regular oil..

$25 for the mobile 1 15k at walmart vs. $10-14 for 5.5 quarts of reg oil. change it once a year or every 6 months...still cheaper than dino!

 

im on full syn and get 21-22 uncorected on 4.10's on hwy trips. no lie and before i did 4.88's

 

im happy with mobil 1 clean 5k and i get 21-22mpg too

 

I was getting about 18 even. Then a ew oil changes with the mobil 1 15k stuff I am getting 22-23 every tank. That is with 33's! I still change my oil at about 4,000 miles though. I dont trust the deposits that eat away at the crank bearings and piston rings.

 

look at the weather as far as temp goes too for better gas mileage.... seriously... i too run mobile 1 syn .. my truck gets awesome gas mileage when the temps outside are above 45-50 degrees.. below that it goes down.. now thats its in the 70's during the day i get roughly 21 mpg where as when it was cooler i was getting 18-19 mpg... i dont think the syn helped that much