Discussion in 'LR4' started by jlach993, May 4, 2020.
The Amsoil magazine has this article which may be of interest.
And this goes back to "there is no one-size-fits-all" statement. Depends on the specific engine and lots of other variables. As a long-time Mercedes owner, I remember the discussion & debate when Mobil-1 0W-40 came out. Some engines had annoying hydraulic lifter ticking noises with that oil, which were cured by simply switching to a thicker version of M-1 (5W-40, 15W-50, etc).
On a vaguely related note, for the AMG M156/M159 V8's from 2007-2012 (approx.) Mercedes factory literature specifically stated that 5W-40 must be used, and 0W-40 was verboten. But for other German engines, the 0W-40 is fine. I don't use it in any of my 1990's vintage motors though.
Interesting. I'm fond of MB's and my first car (bought in 2000) was a 1990 190E 2.6. I recall using Mobil1 10W-30 on that for the 5 years I owned it. I'm tempted to pick up a nice R129 SL600.
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