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JSeery · 04-02-2019, 07:32 AM

What temp are you running the engine at? Low operating temperatures and/or short runs that do not get the engine up to operating temperature can result in sludge build up. Still think an oil analysis is you best bet.

04-02-2019, 07:32 AM	#13
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: oil getting black What temp are you running the engine at? Low operating temperatures and/or short runs that do not get the engine up to operating temperature can result in sludge build up. Still think an oil analysis is you best bet.