Re: Synthetic oil?

Posted by Tim Cole On 2013/9/5 17:29:36

No benefit unless you are going to enter in a demolition derby.

The pointer about detergent oil loosening sludge applies to any motor that hasn't had the pan dropped and cleaned, and the valve chambers cleaned. Detergency also affects the rear main seal. I've seen a number of motors reduced to rebuilds due to this issue.

Non-detergent is better in old worn motors that get limited use because water doesn't emulsify and so corrosion is reduced. Kendall makes a good 30w and Valvoline VV265 can be had via NAPA. Lubriplate also makes non-detergent motors oil. The required rating is SB which is obsolete for motors built after 1962.