Lee Levitt wrote: > > My mechanic, a Mercedes guy (on the board of the local MB club, etc), is > strongly resisting my desire to convert my car to synthetic oil. He's > concerned that all manner of leaks will appear. Generally I trust him on > things like this...but I'd really like to run synthetic.
The way I understand it: The original Mobil One (circa 1975) didn't swell seals, so they tended to shrink after changeover, causing leaks. Then Mobil went too far with a seal swelling additive, and they tended to soften too much, causing leaks. In the last 30 years, Mobil has had plenty of time to solve the problem, and now uses the right amount of the proper seal softener(s). At any rate, I would not expect any new leaks to pop up, unless your pan has rusted out and the only think holding the oil in the engine is the sludge.
