Re: [T3] oil light flicker

["Everett Barnes" <everettb@thesamba.com>]

<x-flowed>>I just switched to straight 30 wt after the trip. I had been hearing 
> recently on the vintagebus list that multi-weight oil is not good to use in 
> out engines. This is due to the fact that our engines run too hot for the 
> multi-weight oil. At the high temps the polymers in the oil-that help the 
> oil provide a range of viscosities-break down, and you end up with the 
> lighter weight oil.
There was some discussion and links were provided that showed that 
multi-weight oils break down to the lower weight at a certain temperature. 
I did not find the links or the arguments used to be logical.  The links 
also referred to tests performed quite a while ago, before several 
well-known formulation changes that went through the motor oil industry in 
the early 90s as well as later years.  In my opinion, these changes 
invalidate all earlier test results.

Long story short, it's fine with today's formulas.

There were some problems when the first 10/40 oils were released because of 
the chemistry involved in providing such a large range.  It prompted some 
car manufacturers to void your warranty if you used 10/40.  It is no longer 
an issue as far as I know.

If you do a search on the Internet, you can find tons of oil arguments.

- Everett

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