Can low viscosity cause an oil leak from the head on a m20? I have changed the headgasket and get a leak between cylinder 3 and 4. It leaks out when I drive but doesn’t leak while idling. I have been dealing with this issue for a while and am at my wits end.
Last edited by Cintas; 01-20-2020 at 10:58 AM.
Same here, twice, just like your case.
what oil are you using? I would be using 10w40 in cold weather. (below 30 degrees for those in warm climates) and 20w50 for warm weather.
Andy
I am using 10w40, and the winters in Oklahoma are usually very cold but it’s been unseasonably warm this winter so maybe I should switch to 20w50
your leak isn't due to viscosity, it should seal regardless
FWIW 20w is too light
If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue
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