lets talk oil
Cargo Master
Joined: Feb 2020
Posts: 2,277
Likes: 949
Never used Amsoil. Been using Schaeffer's for years. Kind of grew up with it since my dad and grandpa also used it. Just don't try to run Schaeffer's to break-in a new motor - the rings won't seat 
Logistics Pro
Joined: Sep 2002
Posts: 4,414
Likes: 1,018
From: Central KY
To the OP: Go watch some videos that tribologists are putting out these days. It'll be interesting to you. There are big differences between CJ and CK oils first of all. Secondly not all oils protect the same and newer API rating is NOT always better. Third why would you spend twice the money for one of these "boutique" oils when there are guys with 700k on oil off the shelf at Walmart?
I just saw another video with Lake Speed Jr. last week and he was talking about how Delo protected test engines better than Rotella despite the numbers on paper that guys always look for not being as impressive. I'm running Valvoline Premium Blue and I pay $75 for THREE gallons of it.
Tuned
Joined: Feb 2019
Posts: 278
Likes: 183
I figure if it's on the approved list, there won't be any warranty issues to get messed around with. Rotella T6 5w40 is just down the road from me at $26.99/gallon regular price and always seems to be in stock. Cheap, available, and approved makes it an easy choice for me.
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Vijay
1999 - 2003 7.3L Power Stroke Diesel
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Nov 23, 2009 01:45 PM
sledhead999
1999 - 2003 7.3L Power Stroke Diesel
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Dec 5, 2002 05:47 PM
