Re: Oil Viscosities

[Stewart MacLund <sundie@lunaticfringe.org>]

I believe (thought this may be the voice of incidental ignorance
speaking) that the firstnumber is what kind of oil it will act like
cold, and the second is the oil it will act like when hot.  SO, acting
like a 50 weight oil when hot is actually better than 40 weight.

Sundie....

> T J Rossmann wrote:
> 
> I live in Edmonton, and therefore deal with some relatively cold
> winters, it can be as cold as -40C or as warm as -5C regularly.  I
> have been running Castrol Syntec 5W30 oil in my '96 Jetta.  Today I
> went to two department stores looking for Syntec 5W30 and the only
> thing that I could find that was close was Syntec 5W50.
> My question is, what difference would using 5W50 as opposed to 5W30
> make in my car?
> 
> Thanks in advance.
> Troy

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