Just a question here, but this winter gas that I hear so much about...does the gas gauge read it differently than summer gas? Asking because I think I may have gotten my first dose in the F-150 last night. I filled up and when I started my truck back up, my gas gauge read the same as it did before I put the gas in. It took me about 13 miles of driving for the needle to go all the way to F.

The same thing happened in my wife's Pathfinder last week. It went up to 3/4 full and then took several miles to reach F.

And Merry Christmas everyone! :santa:

 

Mine did the same thing. The owners manual indicated that it is normal.

 

the slow guage may have been because of the cold.

winter gas is the same as summer gas, only with gasline antifreeze added. This should not affect guage readings at all.

 

Guigster,

Mine did the same thing last night. I filled up, and didn't think to look down at the gas guage until I was a few miles down the road. I started to turn back and go tell the attendant at the gas station that their pump was broke. Eventually it corrected itself, but it did take a while. I've had the truck for two months and that's the first time that happened. I live in Florida so I'm sure the gas nor the cold have anything to do with it.

https://www.f150online.com/galleries....cfm?gnum=3294

 

Mine did this a few weeks ago, too. I concluded that it was caused by turning the key to the ON position before fill up was complete. If you wait till it's full, then turn the key, the guage will go all the way to full. But if you turn the key while filling, the guage will indicate the current level... then correct itself a while down the road.

 

Winter gas is a lot more complicated than just adding antifreeze to summer fuel. Winter gas is reformulated with lighter, low-boiling point hydrocarbons (e.g., butane, methyl tertiary butyl ether, propane, etc.) to increase volatility and enhance octane. These additives greatly enrich the oxygen content of the fuel for improved winter combustion and other benefits. However, a negative aspect of the additives is increased evaporation. When coupled with greater use of your defroster system (air conditioner is running), sluggish engine oil, increased choke engagement, etc., fuel consumption is greater=mpg goes down.

 

It couldn't have been the temperature outside. It was an unseasonably warm 55 degrees last night. I aslo washed the truck last night in the dark. First time I've ever done that.

And the ignition was off when I filled up. I drove home (.7 miles) and it remained in the same postion. In my driveway, I started it and shut it off about 6 times and it stayed in the same spot. Then I decided to take it for a ride and after another 12 miles is when it finally went to F.

Now that it reached the F position, it works fine. I was just wondering why that one time it took so long to register. And why it did it on my other vehicle last week. I thought it might be the winter gas since it just turned winter and the gas stations are probably pumping that now.