I am not a synthetic oil user..it costs too much to change out more than 6 quarts every 3k miles.

However, since the transmission fluid stays in for 30k, the math is better..so I use mobil 1 in the transmission. I can't say the transmission works any better, but I am thinking that the synthetic keeps the temp a few degrees cooler.

We really don't seem to have transmission experts on this board. Come to think of it, any board

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1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


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