Re: quattro-digest V3 #829

[Eugene Tyurin <gene@insti.physics.sunysb.edu>]

On Tue, 6 Aug 1996 Bewildered@aol.com wrote:

> Regarding the post from JEFDO@aol.com about using RedLine 20W50 in his S4:
> I've spoken to Roy Howell of RedLine Oil about which viscosity to use in my
> S4. He strongly recommended 10W30 for most all circumstances. Under extremely
> hot conditions when driving VERY hard where extended high rpm would be
> encountered, he said he might go to the 10W40. He said that 20W50 is not a
> good idea since you will gain nothing and it will rob your engine of some
> power and won't cool the engine as well.

This is all true for new engines.  Old clunkers have wider gaps and need
heavier oil to fill them.  AFAIK only Hondas (<g> Budda's name be
praised!) and newer GM engines have a special design that needs 10w30 no
matter what.  I was told it has something to do with upper part of
cylinder block...

VDO: got fed up with counting at 154 kmiles
1985 4000s Turbo Quattro
--
Eugene Tyurin, Ph.D.
http://www.physics.sunysb.edu/~gene/