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Jordan, after going through all of the comments and suggestions here and studying the oil specs and characterizations, I have decided to switch over and standardize on Mobil 1 0W-40 FS European. I'll back it up with the Fram Ultra XG8A filter. I agree (and so does Melling after a short...

Really appreciate all the comments and suggestions! FlyNavyP3, I'm constantly surprised at the torque and responsiveness of this engine. This 14,000-pound beast tools around on interstates, in city traffic and up/down the Sierra Nevada as well as our Subaru Forester! A_Harman, I'm using AC/Delco...

Sorry guys, that is my typo and the current oil I'm using is Rotella 5W40. My concern leading to this post arises from reading the current Shell advertising blurb on Rotella T6. In the past, the description of the Rotella T6 5W40 diesel oil included statements that its additive package was just...

I'm running a recently (1 year ago) remanufactured Ford big block 385-series 460 engine in my carbureted 1982 E350-based Motorhome. The engine was remanned to essentially stock specs except for a Melling MTF-3 torque camshaft with valve spring loading pressure when open of 255-280 psi according...