Some nice info from Simon that needs to be in this sticky.
Quote:
The figures are here, between 90 and 120degC tops, at 70degC its 30cst which is thick when 10cst to 15cst is a good thickness for a modern turbocharged engine.
............Temp. for 30cSt (Deg. C).......Temp. for 15cSt.......Temp. for 10cSt
5W/40..................71...........................9 0........................117...............
10W/40................70...........................99. .......................118...............
10W/50................80...........................109 .......................130..............
10W/60................89...........................119 .......................142..............
Cheers
Simon
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