IML: Additives

My machinist uses Marvel Mystery oil for a gas mix, and I had the pleasure of seeing the strip-down, and I bore miked the six holes - all had 3.5-4.5 bore wear - deep, shallow, 90 degree - and then he told me it was almost twelve years since he rebuilt it and had covered 133,000 miles. I asked him why the pistons weren't pounded out (the way he drives !), and the rings still retained their .02" end gaps. He popped the trunk where the engine periphery was, and pulled out a can of MARVEL, told me the periodic maintainance it had satisfied, because we do not have an upper cylinder lubricant anymore.

Paul T. Knisely (Seattle)

From: randalpark@xxxxxxx
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To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: Additives
Date: Tue, 27 Jun 2006 01:47:18 -0400

When I was driving my Imperials as everyday cars through the middle 1980's I used an additive called Instead of Lead by Bardhal. Since then, I don't use anything but Premium Unleaded fuel. The cars are driven occassionally on combined city/country 40 trips mixing speeds of 50 through 75mph. I haven't seen any ill effects. If I was running them frequently on long distance, high speed trips, I would probably use an additive. I have heard that valve wear will occur after about 70,000 miles. At that point I am thinking it wouldn't hurt to do a valve job anyway, and while I'm at it, do it right with hardened valves and valve seats.

Paul W.

-----Original Message-----
From: YBSHORE@xxxxxxx
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Sent: Mon, 26 Jun 2006 21:37:03 EDT
Subject: IML: Additives

Peoples,

Is it best to run a lead additive and 93 octane or is there a better combo.

Jack

1956 Imperial Sedan w/354 and three speed Torqueflight

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