Does anybody know the outside temperature range in which 0W-40 oil provides protection? I know 5W-30 is anything below like 98 degrees (in Preludes at least) and 10w-30 is anything above 20 degrees.
0W-40 is the oil which Mobil 1 recommend in the UK for VTEC powered Preludes. However, I use Mobil 1 15w-50 in the warm seasons and 0W-40 in the cold seasons.
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