06 May 12 18:07, Mark Hofmann wrote to Roy Witt:



 RW>> 8^) That's because on warm days, the oil's viscosity is thicker...
 RW>>

 MH> For some reason, I used to think it was the opposite since heat
 MH> normally makes things thin out.

This is why, in the middle of winter, my dad would have to build a
bon-fire under the pan of his uncle's car before they would hand crank
it...

 MH> If you use 5w-40 or 10w-40, the cold morning starts would be at the
 MH> 5w or 10w weight though, correct?

Yeup.

 MH> I would think that when it is cold outside, the oil would still go
 MH> down and cause that lifter noise on startup.

Unless your engine had a block heater. That would keep the oil at a warmer
temp.

 MH> I'm not aware of a 30w-30, but that might cause other issues.

There isn't one. 30w is 30w no matter what the temp is.


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