<VV> Selecting an oil
Bill Elliott
corvair at fnader.com
Sat May 27 19:18:30 EDT 2006
Here's some history for you. Short version is that Mobil 1 and Amsoil
both used a synthetic base and in the early 90's Castrol figured out a
cheaper way to make a semisynthetic base that ended up with a similar
performing oil. Mobile sued to keep them from calling it "fully
synthetic", lost, then changed their own formula to the cheaper base. Or
at least _some_ of their oils... it's kind of unclear.
http://www.technilube.com/sections/comps/synth_diff.htm
http://www.v8sho.com/SHO/Mobil1.htm
The good news is that ANY of these oils (whether you consider them
"fully synthetic" or not) are just fine for your Corvair and will FAR
outperform any nonsynthetic oil. Most folks agree that Amsoil is the
best; the question is whether it's worth the additional cost.
I change my oil every 5000 miles (or more usually twice a year) and for
the last few years I've been very happily running Castrol Syntec 5W-50.
Amsoil in the transaxle though.
Bill
Mikeamauro at aol.com wrote:
>
>"...Thanks Ken every motor I have runs Amsoil and has for 20 + years. But we
>know
>why! Thanks Jack..."
>
>
>What's the skinny on Mobil One? I know it is not as good as Amsoil, and
>probably is not a true synthetic, but does it have the right "stuff" (relative to
>recent changes in many motor oil's anti-wear ingredients) to protect Corvair
>engines?
>
>Thanks,
>Mike Mauro
>
>
>
>
>
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