Chris Hogan wrote:
>
> Meant to say more...and reveal my limited understanding of lubricants...
>
> My understanding is that the first number in a multigrade oil spec indicates how fast it flows when cold, and the second number is the weight when hot. So 0w-30 flows fast when cold, but protects like a 30 weight oil when hot.
>
> And that's the extent of my knowledge...
>
> Am I wrong?
>
> Chris
>
almost ;)
1st is cold pour viscosity,
2nd is lubricating property "equiv."
when hot.
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