Re: 5W-30 on the Autobahn?

[Henri Baccouche <henrib@xxxxxxxxxxxx>]

>  Let's not forget that the important number is the 2nd one, i.e. the
> 30 in 5w30.  A 5w30 behaves like a 5 weight when cold, and behaves
> like a 30 weight oil when warm.

I always understood it as a 5w oil capable of handling 30w operating
temperatures. It's still a 5w on the freeway........on every hot day.
It does not thicken to 30w.......

>
>  Furthermore, a properly designed motor has internal clearances
> specified with the designated lubricant in mind.  A motor designed for
> thinner oil should last just as long as one designed for thicker oil,
> provided they're using the right oil. As long as the oil film is
> maintained between the moving parts, you gots no problems.

Agreed, the question is when a 5w or a 0w is specified........is it selected
for maximum gas mileage over maximum durability ?

Funny, how manufacturers never "crow"
about durability.......

H...


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