[AT] unleaded gasoline

[Grant Brians]

Ron, the issue as documented by several studies is twofold. If the valves 
and seats are hardened, no real issue with valve wear, the issue with 
removal of lead from Gasoline fuel. The second issue is how hard do the 
tractors work. If they are worked hard, there will be serious wear and 
repairs needed sooner if there are not hardened valeves and seats (valve 
seats that is, not driver seats....)
    So work them hard and make sure the hardened valves and seats are in 
place, with 15W40 oil which is formulated correctly for the older 
machines....
        Grant Brians
        Hollister, California
----- Original Message ----- 
From: "Ronald L. Cook" <rlcook at pionet.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Friday, December 02, 2005 8:21 AM
Subject: [AT] unleaded gasoline


> Opinions please.  2510, 3010, and 4020 John Deere gas tractors.  Working 
> tractors, not parade tractors.  Are they going to hold up on unleaded 
> gasoline or do they need some lead from time to time?
>
> Ron Cook
> Salix, IA
>
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