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philipswanson · 08-16-2020, 10:56 AM

Either pull the engine and do it right or just keep changing oil. Shell Rotella has a higher detergent level because its a diesel oil. You might try that. I run it all the time in my flatheads.

08-16-2020, 10:56 AM	#14
philipswanson Senior Member Join Date: Oct 2015 Location: Bonita, CA Posts: 1,374	Re: Cleaning engine out in '40 Sedan Either pull the engine and do it right or just keep changing oil. Shell Rotella has a higher detergent level because its a diesel oil. You might try that. I run it all the time in my flatheads.