Which One Oil of the Three Brands

[jimdman]

Shell Rotella

Delo 400

Valvoline Heavy Duty


All are close in price. All are 15W-40 conventional. Which Brand?

[dusted4eva]

None. Amsoil Synthetic.

[Baddestt]

Agreed,...go Amsoil

[hazard]

valvoline premium blue extreme 5w-40 syn...nuff said

[jimdman]

Positives and Negs of the Synthetic.

[FastFocus]

this is a dumb question and i dont mean to hijack the thread, but can you go back and forth between synthetic and dino oil? i know back in the day you werent supposed to but what is the rules on that now?

[Mudvain]

for the original question, rotella by far. its been used by otr truck companies for years. but then again, its all personal preference. as for synthetics, i think an investment in an oil bypass filtration system would yield far superior results over time. plus, be less expensive in the long run.

[Gear Jammer]

Shell Rotella

[pete37922]

Amsoil 5w-40 !!!

[npccpartsman]

Amsoil SUCKS and will sludge up your engine. Don't believe me???????? Ask a few of the tech's on here that have had the displeasure of working on one of those nasty mofo's. If you want a GOOD inexpensive dino oil for your money Motorcraft is quite excellent also.