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Old 12-21-2020, 02:39 PM   #409
bluesubie
Scooby Guru
 
Member#: 767
Join Date: Jan 2000
Chapter/Region: Tri-State
Location: N.J.
Vehicle:
04 FXT
20 OB Onyx XT

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Quote:
Originally Posted by pazzoduc View Post
Any reason to not use CK-4 oils for our older EJ engines? The necessary additives in FA-4 oils to get a little more fuel mileage isn't likely going to be a benefit, no?


Living in a high temperate location seems like the higher viscosity CK-4 oils would be a better choice for me than the FA-4 oils particularly when used in a high output modified engine?


EJ25 +/-450 HP, oil cooler, AOS, TMIC, Mishi XL radiator, E85 flex. Summer temps regularly 100f, Winter temps rarely below 40 cold start.
Have not had bearing clearance conversation with machine shop yet, so have not put that variable into the discussion yet.
CK-4 oils are fine to run in an EJ.
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