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Re: break in oil

From: Hank Dozier
Email: dozierhc <at>
Remote Name:
Date: September 24, 2003


I would use a good quality multi-grade NON-Synthetic oil such a Valvoline 20W-50 for the initial break-in. This oil is thick enough to stick on the parts, but thin enough to pump without undue stress on the cam drive gear. Put a new oil filter on, and make sure when you start the vehicle to try and run the engine with no-load at around 2000 to 3000 rpm varying it for about 10 minutes. After that, you can let it idle for about another 15 before actual putting load on it and driving it. Try and keep the RPMs below 5000 for the first 100 miles. After that, you should be OK. Change oil and filter at 500 miles, and then again at around 2000 miles. After that, if you wish to switch to synthetic oil, you can do so, unless you have chrome rings. If chrome rings are used, wait until mileage is around 5000, as these rings take more time to set than iron or iron/moly rings.


Last changed: July 19, 2018