What oil weight should I be using W20?

 

5w20

 

With the 5.7l you are just asking for problems, if you do not use 5w-20. The MDS will not work properly...

 

WIll do boss!

 

Amsoil nothing but amsoil

 

I am unfamiliar with Amsoil. I see the ad every once in a while, can you say a few words why it is better? Do you have a history of using it?

 

I even use amsoil in my lawn mowers and have been using it since 1989 and wont use dyno oil, go to there main website i can give you other testimonials if you want from friends. i am a preferred customer not a dealer so i am not making any money if you buy it become a preferred customer and get it at cost.