Quote:
Quote:
Nobody but Amsoil guarantees their oil for up to 35,000 miles/1year. I know a lot of people don't agree with that, but I happen to love the fact that I only have to change my oil once a year.
And I can't believe how many people on this site actually believe the auto manufactures actually care about improving gas mileage. They only do as much as the feds mandate that they do. (why do you think they've been cheating on the mpg ratings for so many years?)
If they went full synth on all of their cars it would cost them too much money. And we all know they don't have money to waste these days.
EPA (Fed Gov) is why the MPG ratings are screwed up.
I've used full syn vs blends vs conventional oils in MANY vehicles driving the same route and have NEVER seen any improvement with any oils.
Change from 10-40 to 5w-30. I have seen some change in MPG with weights of oils, not type.
The MFG would LOVE to get 1/2 MPG.
Bill
Respectfully disagree. Got to fueleconomy.gov and you'll see all the adjusted mpg ratings. usually about 10% below that of the manufacturer. Ahhh, but now for 2008 and beyond, the manufacturer is required to post the real numbers that the cars will get in real traffic during real life driving conditions.
A lot of numbers will drop.
As for synth improving mpg. Some see it, some don't. I have. My T&C with a 3.8 did a good deal better.