In aviation circles, mineral oil is known to do a better job of
scavenging combustion byproducts. It also degrades more gracefully than
synthetic (though synthetic holds its characteristics longer). There
are no full-synthetic oils made today for piston-engined aircraft, but
there are several semi-synthetics.
Something (else) to consider if your Healey doesn't have a particularly
"tight" engine.
bs
Alan Seigrist wrote:
> I have MT90 in my BJ8 gearbox and I can tell you it leaks alot less than
> when I had 30wt in it. Putting it in six years ago I only had to top it up
> with less than half a quart just yesterday.
>
> Alan
>
> '52 A90
> '53 BN1
> '64 BJ8
>
>
*******************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
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