My dad has a 1968 VW Beetle that has been in the family since brand new. It only has around 55K miles on it. It has a slow oil leak and I was looking for some advice. I believe he uses conventional 10W30 in it now. Would going to a slightly heavier oil help the slow leak? What about a high-mileage engine oil? I don't know much about air-cooled engines and wouldn't want to put something heavier in it (10W40, 15W40, 20W50???) in it without asking advice first.
Thanks,
David
Thanks,
David