I really think that age, not mileage has to do with the leak problem. Any car over 10 years old that doesn't leak will probably leak after putting in the Synthetic. Even if you do an engine flush and put dino oil back in it will probably leak. But I bet your engine will run better. So you really have some trade offs.

I will keep everyone posted on the Saturn!!

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Lube-Direct

 

msparks..

That's true...mileage can add up quickly if a vehicle is driven frequently. I think you are correct that it is the 'age' of a vehicle that matters the most. Our Mazda is 8 years old...but I think I will skip the synthetic in it. I put Synthetic in my wifes new car at 127 miles and my truck at 667 miles.

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2000 F-150 XLT, 4x2, 5.4L Supercab, Styleside, Black with silver two-tone, 3.55, class III towing package with heavy duty cooling package, 4 wheel disk ABS, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, Pendaliner bedliner, K&N air filter, rubberized undercoating, cabin filtration system, Bugflector II, 5W-30 Mobil 1, engine build 10/4/99

 

It's my understanding that synthetic oils have better "wicking" action than conventional petroleum oils. This wicking action permits the oil to enter and lubricate components that require minimal operating clearances, i.e. hydraulic lifters. Unfortunatly, this is evidenced as "leaks" is margial gaskets. My feeling is, oil is cheap if the alternative to seepage is accelerated wear.