The reason it seeped through (like stated above in previous posts) is becasue the leak was already present there....Dyno oil leaves deposits that can fill leaks.
Synthetic oil cleans out thoes deposits and makes the leaks noticeable...By not taking car of the leaks you can have a bigger problme later than now. people thinking that synthetic oil causes leak, is a common misconception.
Lupe
Hmm I don't know who out there would think synthetic oil would cause a leak....but anyway...regular 5W30 oil is the way to go if You do have a leak of some sorts. I have a very small leak from the oil pan gasket. But it's so small that I don't see the oil level going down on the dipstick. Only when I was using 5W30 synthetic did I have to add 1/2 litre between oil changes.
