inaccurate range display

[Markuson]

Could this "feature" of warming the fuel possibly be the root cause of some folks experiencing "boiling" gas tanks? Particularly at altitude?

Food for thought @Markuson ?

HTH

I’ve had boiling gas with well over half a tank. Weird stuff. As I’ve mentioned before...also weird that I have only ever had boiling gas in Utah...multiple times. -Never in Colorado—even though elevations in Colorado have run above 13,000 feet on many occasions. Tank was full enough, in fact, that it was gurgling right out the cap. I think I recall this with TonyPs truck too.

 

[bloc]

I’ve had boiling gas with well over half a tank. Weird stuff. As I’ve mentioned before...also weird that I have only ever had boiling gas in Utah...multiple times. -Never in Colorado—even though elevations in Colorado have run above 13,000 feet on many occasions. Tank was full enough, in fact, that it was gurgling right out the cap. I think I recall this with TonyPs truck too.

Keep in mind there is a fair amount of heat under the truck as well, especially at low speeds. Between the radiant heat from the transfer case and exhaust, convective from the radiator and engine-bay air, even with a full tank if your ambient temp high and ground speeds are low, AND something going on with modern lower octane fuel, boiling apparently is possible.

 

[Markuson]

Keep in mind there is a fair amount of heat under the truck as well, especially at low speeds. Between the radiant heat from the transfer case and exhaust, convective from the radiator and engine-bay air, even with a full tank if your ambient temp high and ground speeds are low, AND something going on with modern lower octane fuel, boiling apparently is possible.

Re low fuel, heat, etc...the last incidence of boiling gas I had was last year on the way to Ouray...bombing down a Utah highway doing about 85mph. Pulled off at a rest stop, and sure enough...it was boiling away. Also...in that case, I opened the cap to get a blast of air pressure. I was at about 1/4 tank...and it was the first time I’ve seen boiling gas on flat highway and at high speed. But once again, as always for me...Utah. Thinking elevation was 5500 or so. Not sure, but definitely not particularly high alt. Weeeeird stuff.

 

[swiss200]

Re low fuel, heat, etc...the last incidence of boiling gas I had was last year on the way to Ouray...bombing down a Utah highway doing about 85mph. Pulled off at a rest stop, and sure enough...it was boiling away. Also...in that case, I opened the cap to get a blast of air pressure. I was at about 1/4 tank...and it was the first time I’ve seen boiling gas on flat highway and at high speed. But once again, as always for me...Utah. Thinking elevation was 5500 or so. Not sure, but definitely not particularly high alt. Weeeeird stuff.

Newbie question: what is boiling gas and do you just notice it when opening the fuel cap?

 

[bloc]

Newbie question: what is boiling gas and do you just notice it when opening the fuel cap?

Some of us have noticed the gasoline in the tank literally boiling like a pot of water in certain conditions. Usually with a lot of heat, at altitude, or with gas from certain areas.
Generally you’d open the gas cap and have a big rush of vapor and possibly some fluid spraying out.. then listen to the filler port and you can hear gurgling sounds. Some people notice fuel running down from the gas door and remove the cap to find what I described.