Change oil soon (& then some)

[Shannen Durphey]

AFAIK, remembered from a discussion in a training class,
this is the answer.

Better grades of oil have allowed reduced engine clearance
specs.  In turn, reduced engine clearances require "thinner"
oil.  Oil of too high viscosity can cause the bearings to
burn out.  I don't know whether it's th inability of the oil
to carry heat away fast enough, or the inability of th oil
to provide adequate lubrication.

This can also happen in aluminum manual transmission
gearboxes when the required ATF has been unknowingly
replaced with traditional gear oil.

Shannen

Bob Wooten wrote:
> 
> Thanks to all.  I just changed the oil & when I went to check the manual
> (yes I am one of those who do read the parts that are important to me), to
> see how much oil it was going to take there were about 600 warnings to use
> only 10-30 (or 0-30 for those of you in the colder places) Motor oil & to
> "NOT USE OTHER GRADES SUCH AS 20-50".  What gives?  am I so out to lunch
> that I have missed something in motor oil technology?  Mind you this was a
> 20 year step up for me (had a 78 Turbo Regal), so now you know where I am
> coming from.
> 
> Thanks again
> BW
>
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