Originally Posted By: Ikken
Hi Jaha24k,
That can happen ONLY if you switched from dino oil to synth in specific cases. Detergents might clean gunk at seals which were sealing before thus they start to release some fluids. There are seal swell additives today in synths, so this is generally not a problem.
To answer your original question no, high speed should not harm the lubrication system, it is designed to be holding much more pressure. Of course there is a bigger stress on seals if the engine RPMs are higher due to the oil pressure, but that's all. If there is a leak, that is a sign of seal failure, it's not really about user error. Usually oil filter housing seals (if there are) give up the fight first, as they get the highest pressure most of the time.
One thing can cause leaking though - which is overfilling the engine with oil, causing higher crankcase pressures in general.
It's not the synthetic oil's fault the engine is dirty with worn out components. Fix your friggin cars people, and let syn-oil-leak-fear die already.
The Jeep stopped leaking when I switched to synthetic. Care to explain?