I had a bad leak start, perhaps coincidentally, when I converted my 300TE at 8 yrs old/68k mi. Rear main had to be replaced, and I've since replaced just about every piece of rubber in the motor. But at 169k, it's running strong-albeit it's had the full top-end treatment. And I only use Mobil 1, becasue even though you may have to replace a few seals, the added protection and ultimate longevity outweighs such minor setbacks.

My 500E was converted at 43k mi/7 yrs old, and no leaks by the way. And the D was just converted to Delvac 1, and no leaks so far.

I say, if you're gonna keep the car, go ahead and switch.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo