Best oil

[Jaderickson28]

What kind of oil does everyone use and what's the best?

 

[Powerstroke Man 6.4]

What kind of oil does everyone use and what's the best?

I use Mobil Delvac 15W40 , Motorcraft 15W40 or Valvoline premium blue 15W40.

I change oil in my trucks 5-7K.

I did noticed when I ran CI-4 15W40 Cat oil. The oil temp went down 3 degrees.

 

[DWhite]

Motorcraft or Mobil Delvac 15W40.

I change anywhere from 3,500-5,000 depending on how much towing I do during that change.

 

[Radioflyer]

Shell Rotella, Delo, or Mobil Delvac 15-40.

Every 5K for oil change

 

[griz700rocket]

Rotella t6 or Amsoil, 5k.