Just wondering if i could run mobil 1o-30w oil in my my 2001 blazer with now problemssuppose to help get a little better gas mileage?

 

I wouldn't expect any increases in mileage. If you live in a hot climate, I wouldn't touch it.

 

yeah ive been seein this to, its like enviormentlay friendly or something, wtf do you use it for?

 

Wow I didn't know they made 0-w30..........I wouldn't use it in anythingI would think it would be way too thin.

 

This grade of oil is quite popular in Europe.Mobil's version isactually not 'thin' at all with a viscosity rating of 11.0 cSt @ 100*C (compared to Havoline Synthetic 5W30 rated 9.3 cSt @ 100*C). See my explanation of multi-grade oil viscosity in the 8th reply to this thread.

 

What about 5-20w I heard Ford vehicles switching to that weight with increases in mileage just trying find little increases any where i can?

 

Neither Ford nor any other manufacturor chooses oil grades to increase mileage in any indivual vehicle. It is done to increase their CAFE (Corporate Average Fuel Economy) ratings. When you multiply the almost immeasureable increase it may bring times millions of vehicles in their production, it adds up to make their scores look better.