Heating Oil vs Diesel

[JanDebL at aol.com]

I was working as a diesel mechanic in one of the taconite mines in northern 
MN during one of the "energy crisis's" and we were using #4 & #5 heating fuel 
in our diesel trucks (170 ton, 1600 HP trucks).  Aside from being very 
viscous at room temperature and worse as it got cold, the fuel would cloud up 
and quickly turn into something resembling lard at - 30 F or colder.  To 
prevent this, we installed huge heat exchangers on each truck which heated 
the fuel using the engine coolant - but even this couldn't keep 600 gallons 
of fuel warm when it got really cold.  We ended up using a product made by 
Shell Oil called Aeroshell, I believe it was intended for aviation use.  It 
was a 16 oz can which treated 500+ gallons of fuel and completely eliminated 
the jelling problem. 
A side note - because of the "energy crisis"  the company would occasional 
provide 5 gallons of fuel to any poor employee who stopped to fuel up on the 
way to work and found the station had run out of fuel.  One day this happened 
to me, so I put 5 gallons of this #5 fuel with the Aeroshell additive in my 
Rabbit diesel.  There was a very noticeable increase in power - almost like 
it was supercharged. I drove nearly 300 miles with that 5 gallons of fuel.  
The down side was it smoked like a coal locomotive but it started and ran 
normally. 
Jan Lahtonen
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