Re: [DML] Fuel Pump Care

[Peter Lucas <lucas@xxxxxxxx>]

Why would having more gasoline in the tank make it cooler? *Adding* gas 
would certainly cool things down, but that would be a transient effect. 
Keeping the tank full will increase the thermal mass and reduce the 
*variability* of the temperature, but it seems to me that--depending on 
the change of outside temperature--it would be as likely to raise the 
fuel temperature as to lower it.  No?
--Pete Lucas
   VIN #06703

On Sep 14, 2004, at 11:10 AM, Rod Dillman wrote:

> The postings about fuel temperature in the gas tank cause me to 
> believe a theory and practice that I have had may be valid. I have 
> always felt that heat helps to shorten the life of a fuel pump. It has 
> always been my practice to try and keep my fuel tank at least half 
> full, the theory being that the more gasoline that is in the tank the 
> cooler it will be. In a DeLorean a half full tank is only 6 or 7 
> gallons, in one of my Cadillacs half full is 13.5 gallons since it has 
> a 27 gallon tank. I believe that the relatively small tank on the 
> DeLorean makes it even more important to fill up often in order to 
> lower the tank temperature especially on hot summer days and 
> interstate driving. While I have no proof that a fuller gasoline tank 
> is better for the fuel pump, the practice has little down side other 
> than causing a few extra stops which your lady will appreciate.




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