Originally Posted By: edyvw
Originally Posted By: OVERKILL
Originally Posted By: edyvw
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.
Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.
Some people claim that Castrol is smoother. Is it smoother to drink? I don't know why an engine would run smoother at cold starts with an oil that is thicker when cold (has lower VI) and has less friction modifiers.
Castrol has Titanium, and as far as I know it is Full-SAPS oil, same as M1, so it has pretty much same TBN, except M1 does not have that good TBN retention.
It has had great TBN retention in the applications I've run it in
Mine dropped to 2.7 in 5K on first UOA, second was 2.3 after 5K.
Mine was 7 after 6,200 miles (10,000km), and that was in the fuel diluting M5.