Thinking about switching over Amsoil engine oilis there any gain in mpg?

 

I changed over to amsoil engine oil, and changed out my differential fluid to amsoil at the same time, I got a solid 1.5 MPG gain...

 

Sweet 2 cases on the way before Amsoil raises prices Aug. 1st

 

on the amsoil bottle it says something like you only have to change it every 35k or one year which ever comes first....this was 0w-30 i was looking at

 

I've been doing a lot of reading and emailing a Amsoil dealer. The 0w-20 they claim is good for 25000 miles or 1 year. The dealer says thats ideal perfect conditions, he says more like 10-12000 with the Amsoil extended oil filter. The dealer will sell me 2 cases of 0w-20 and 3 WIC filters, which are good for 7500 miles,for $199.