Full Tank

Ok can somebody please explain this to me. Why is it that when you full up a full tank and as your pulling out of the gas station your car is so smooth and when your shifting gears like even if its a crappy shift your car just feels smooth no matter what. Then when you drive around for a bit it goes back to normal like not as smooth even if your tank is 75% full why does it only do that smoothness (you will know what im talking about) right after you fill up fully?

uhh... ok

only smooth i can think of is full tank of gas doesnt "slosh" around in the tank like a 1/4 full tank does..tank :D


i drive a firetruck daily with half full tanks of water on the back of them. the entire vehicle kicks back at you when i switch gears because the water is waving back and forth...tank

The only thing that comes to my mind is that the fuel you just put in is colder from being underground and colder fuel burns better.
A friend of mine..old timer hotrodder... had a trick for his cars where the fuel line was modded into a coil going into a bucket with ice right before he dragged and the HP gain was very noticeable... kinda the same thing with a good intercooler...the cooler the air/gas the more dense it is. That might be it
Does the car act the same if you went home and the car sat for few hours or a day and then drive it? or is it just when you leave the pumps?

fill up the tank every time its at 76% full and there wont be a problem....:)

lol...yea i noticed it drives better, but not fater because of the weight...but yea i know what youre talking about!

yea come to think of it. it does have a smooth feelin to it.

yeah i agree, for a little while after i fill up the car seems to run smoother but not for days or anything. Just maybe an hour er so.