<VV> synthetic oil

[BobHelt@aol.com]

Hi all,
The use of synthetic motor oil is one of those subjects that opinions will 
vary considerably. And since you asked, here's mine.

First, always use a multigrade oil. Forget 30 wt. That is obsolete stuff.

Next, choose a multigrade oil that matches the temperature range you expect 
to encounter while the oil is in use, and also with regards to your engine's 
condition.

That means, for most applications, 10W-30 for the winter and 20W-50 for the 
summer.

Now about synthetics......Always use regular conventional SL oil unless you 
have the following conditions:

A car that uses NO oil between changes. That is, no oil added in 3000-5000 
miles.
Extra $$$$ to spend
Have a concours car that you want to keep and drive forever.
Want to brag about the kind of oil you use.
Operate your Corvair in temperatures below -20F or higher than 110F
Have air conditioning in your car and use it in summer temps exceeding 100F.

For 99% of the Corvairs on the road, synthetic oil will only add to the cost 
of driving, and nothing else.
Regards,
Bob Helt