m5board.comoholic (>1000 posts)
Join Date: Apr 2003
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Liquid Moly is probably a good oil, but shouldn't you go for the higher API i.e. Liq Moly is API SL, however Shell Helix Ultra 10w60and Castrol 10w60 are both API SM, i.e. newer.
This is the more basic as it is split (for passenger cars) into two catagories. S = Petrol and C = Diesel, most oils carry both petrol (S) and diesel (C) specifications.
The following table shows how up to date the specifications the oil are:
SG - Introduced 1989 - has much more active dispersant to combat black sludge.
SH - Introduced 1993 - has same engine tests as SG, but includes phosphorus limit 0.12%, together with control of foam, volatility and shear stability.
SJ - Introduced 1996 - has the same engine tests as SG/SH, but phosphorus limit 0.10% together with variation on volatility limits
SL - Introduced 2001 - all new engine tests reflective of modern engine designs meeting current emissions standards
SM - Introduced November 2004 - improved oxidation resistance, deposit protection and wear protection, also better low temperature performance over the life of the oil compared to previous categories.
J (formerly SchrickM5)
2014 M5 Competition
Alpine White III