240Joe, On the subje of diesel rated oil. When my tech. recommended Castrol 20W-50, I went to Castrol's web site to look up if it was diesel rated. Well fro this particular weight, it has no "CH" or "CG" rating but some of their lighter weight oils do. Should I switch and run the chance of having a higher oil usage? Normally such a thick oil would cause cold morning starts, a problem. Since I am using the block heater, she starts rightup even when it's 22 degs. outside.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member