Discussion in '6.7L PowerStroke Engine & Drivetrain' started by Steve Edwards, Jun 26, 2019.
Trying to find what oil is used most by everyone.
I use Motorcraft 15w40 oil. I pull an 11K pound 5th wheel, almost exclusively with it otherwise I might use the Motorcraft 10w30.
Rotella 15w40 is the best, followed by Valvoline
Amsoil Signature 5w-40, with 6.7 duel remote filter system. Been using Amsoil in all my vehicles since 2000. 2000 4.2 F-150 SC, 2005 4.6 Screw and now 2014 6.7 L Super Duty.
On my 2004 Ford 6.0 with 100k+ towed max 21k used Rotella 15-40.
I used Rotella 15-40in my truck. Worked great, once it was warmed up. I had the romps with this oil. Switched to 5-40 and never had a problem.
I use Rotella T6 5w-40 and haven't had an issue. Just got my OA back from blackstone after 7800 miles and it was still in really good shape.
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