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best temp. to burn fuel

I cant find the answer to this any where. Does it even mater

Answer this question I have this problem too

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One gallon of hot fuel contains fewer BTUs than a gallon of cold fuel. For that reason an engine is more efficient when cool fuel enters the cylinder. IMO cool fuel should result in better MPG. I am sure someone else can give a better answer.


It will put more fuel thru the engine but if the engine becomes more efficient and mileage should come up.

I have used air to air trans. coolers for fuel since 1997 as per the advice of a CAT mechanic. Cooled fuel helps prolong the life of injectors. It also definitely improves performance. On a hot day here in GA the truck runs as well at 4 in the afternoon as it did when the temp. was much lower in the early morning. The difference is very noticeable between the hot days of summer and 20-30- degree days in NY. One word of caution: bypass the cooler in the winter so that your fuel won't gel easily. On a Paccar prod. the cooler is very easy to mount in front of the radiator with dealer supplied brackets.

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i doubt that it matters since it combusts when compressed, in the cylinder, which raises the air/fuel mixture temp.

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Fuel coolers are common on race cars and cooler air is more dense and makes more power so you would figure that it would help. I have a Bud that took a transmission cooler and runs his return fuel through it. He also installed a fan on the cooler and hooked it to a switch on the dash, seems to be working well for him. Thinking about doing the same thing myself......

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both you and Your are right when it comes to cooler fuel making more power but won't that also increase the amount of fuel burnt?


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Chad Boblett will be eternally grateful.
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