I have heard from a couple of different sources that the newer SL or SM designated oils are problematic for older engines. It would seem that they dramatically reduced the amount of zinc in the oil. This results in high rates of wear on the top end with the camshaft being hit particulary hard.
Anybody know anything about this and what should we do? There are no longer any SJ designated oils available.
I had to replace the drivers side cam on my 76 450SL last summer. That was a very expensive repair. I had been running Valvoline MaxLife 10w40 here in Wisconsin and changing it about every 3K or so. (This is not the synthetic or synthetic blend). Car always had good oil pressure and did not use oil.
Anybody know anything about this? Should I be using something else?
03-05-2008, 12:46 PM
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