It is hard driving that causes valve wear. Usually long ,high speed drives
on the interstate, especially with a large load or towing a trailer/vehicle
does the trick, especially if you do a lot of uphill driving..
For the easy usage most of our Imps gets, I wouldn't worry about valve
recession, unless you're repairing previous done damage. But, if you plan to
tow, take long journeys or carry heavy loads very often, go ahead and have a
set of hardened exhaust valve seats installed. End of problem.
Phil <><
----- Original Message -----
From: "John Harvey" <harvey5691@xxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Wednesday, September 11, 2002 7:02 AM
Subject: Re: IML: Additive to moderate valve wear
> I have been driving a 1951 brand P car for more than 20 years without
using
> any additives to suppress wear, and there doesn't seem to any damage. I
> have probably driven 40,000 miles in it, and the engine was old when I
> started this. I have used gas with and without alcohol in it and not
noted
> any difference in the way it runs. Nor have I had any problems supposedly
> blamed on alcohol in the gas. I use 10w30 motor oil in an engine
originally
> designed for non-detergent oil. Yes, it uses some oil, but it always did.
> Most of the people who claim valve recession and other wear have high
> performance cars, and drive them that way. I suspect hard driving has
more
> to do with engine wear (Surprise, surprise) than the lack of lead in the
> fuel. I have a 57 Allis-Chalmers tractor I use for things like driving an
8
> foot wide snowblower, and dragging a 16 foot batwing mower, and it
> seems to be quite happy with the cheap non-lead fuel, too.
>
> JOhn
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