AntiRust Additive

[Ron Lockhart]

Neat - real data!
Ive been using 2% castor.  Got a suggestion
for specific antirust additive?  And how much
to add to fuel?

Thanks, Ron Lockhart


----- Original Message -----
From: EHaury at aol.com
Date: Wednesday, June 18, 2003 10:56 pm
Subject: Re: OS After Run Rituals

> Bob
> 
> Many years ago I ran a lab test that measured the rust prevention 
> performance 
> of various additives and oils. Basically the test consisted of 
> dipping a 
> small, clean steel plate into the test oil, allowing it to "drip 
> dry" for a 
> period, then suspending the plate in a humidity cabinet (100% 
> humidity @ 100 deg F) 
> on a carousel with stainless hooks for some time. 
> 
> Antirust additives work, viscosity works (thick, remember 
> Cosmoline), and the 
> combination is best. I recall that a well additized, thin, gun oil 
> didn't 
> prevent rust nearly as well as non-additized 50W oil.
> 
> Generally things like motor oils (including synthetics), 
> transmission fluids, 
> etc., contain very little, if any, antirust additive but will work 
> somewhat 
> because of their viscosity. The thick stuff makes starting 
> difficult. Gun oils 
> (thin), air tool oils (thicker), and some specialty antirust 
> fluids work and 
> are reasonable to clear when starting. The problem is that most of 
> these "oils" 
> don't mix well with methanol.
> 
> Which gets us to considering glow fuel with antirust additives and 
> a small 
> amount of castor (2 - 3%). The viscous castor + additive is 
> miscible with the 
> methanol in the fuel, and both contribute to rust prevention. Just 
> run the 
> engine dry to minimize hydrated methanol, the castor and additives 
> will stay in the 
> bearings. If you wish to add something, make sure that it has the 
> desirable 
> properties. 
> 
> Earl
> 

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