Loss MPG with Mobil 1

i use synthetic and dont see a change i mpg. and i range between 13 to 15 mpg.

 

Yup. And fluids like in the tranny and pumpkin(s) are colder / thicker until warmup, causing more parasitic drag. And tires run a lower PSI for a while, causing more drag.

 

Debating you sucks. You make too much sense.

 

I've been running mobil 1 5w30 since my second oil change so i dont have much of a baseline but my mpgs are good for my truck being lifted and such.

i agree with you chris, colder, denser air= more fuel required at given RPM to maintain the same AFR so mpgs will go down a bit.

 

He is a masterdebater.....

I use Penzoil Plat... no change. Maybe switch to Mobil 1 or all the same if it's syn?

 

i lose mpg due the facts the morning here gets pretty chilly and i warm it up like 10-15 mins

 

anyone used amsoil gets high MPG?

 

I got an extra 4 MPG out of Amsoil on my 1998 Jetta TDI, but that is a turbo diesel engine. I am switching to Amsoil before I go on my holiday road trip - 2800 miles round trip.

 

i buy it locally here in south jersey...
the 25000 miles amsoil 5w-30 for like $10.42 a quart, tax included

 

I never notice, my truck has been so bad on fuel lately i dont even check anymore. I used mobil 1 5w30 since new.

 

Dont you know M1 is formulated to decrease mpg so you'll buy more Mobil gasoline?

More likely winter fuel blend & cooler temps.

Running different oils, of the same weight, dino vs. syn, whatever, your talking tenths in mpg differnences, maybe a little more diff in cold temps where syn flows better.

 

Same here. No difference in mpg.

 

13-15 that kinda sux, even with my lift extra weight and tires i still manage to get 17-19mpg

 

i guess I'll try the amsoil to see if it kicks ass

 

my last tank was 14.8mpg and i just switched to mobil 1 too. i dont think it has anything to do with the oil i just assume its crappy winter blend gasoline and 100% city driving on that tank.

 

I use that, too. Won't make any difference, at least not enough to be detectable considering all the other factors in a daily drive that could throw it off (temp, wind, your right foot, etc).