I've got 101,xxx on my 98 CSVT and have used mobil 1 Synthetic since I bought the car... up until recently. Started to notice that I have a small oil leak at the oil pan gasket (common
)(like, extremly minute, oil doesn't make it off the car and onto the ground). Went to Mobil 1 drive clean synthetic blend, and the leak has gone away... I belive synthetic is still the best to use, but until the leak gets worse, I'll "block it up" with some synthetic blend for awhile.
