Nothing personally, but gas tanks systems aren't meant to store gas in the filler tube so I'm sure it's a saftey hazard of some sort. I'm not sure exactly what though, I've just been told by mechanics that you shouldn't do it "just cuz"
BrianSD_42 said:
It probably is not safe in an accident.
So in theory it is a safety hazard while driving the first 40+ miles until the fuel level reaches back down to the bottom of the filler neck? The safety issue is that the gas is closer to the outside of the vehicle? Even if there isn't gas in the filler tube, isn't there gas fumes from the tank in the filler tube that could ignite maybe just as easily? Or is there some sort of valve there that closes between the tank and filler tube to keep fumes/gas out of the filler tube when the tank is filled to the proper level?
jgue467 said:
Well how about expansion? Depending on what time of day you fill, outside temps, brief drive home from your 20+ gal site could = too much pressure build up. I see it in just a 5 gal gas tank that i might fill to 95%, burp just before leaving it sit then return a couple hrs later, burp it to find lots of pressure escaping (all while in the shade). Not sure if that's good for the fuel system
IBallEngineer said:
Expansion is why, unless you like the gas fume smell there is no reason to run the risk of fire or worse.
I'd assume that the pressure can escape somewhere in the system, maybe at the gas cap? Or via the canister system?
JayRolla said:
When topping off its draining into the canister. So you not even using that little amount of fuel. Wasteful and can cause gas fumes around the vehicle.
Also to op why you feel the need to post that you filled your tank? We all have to put gas in. Lol. 18.5 gal tanks. That's about what we all can fill.
I haven't smelt any fumes around my truck after filling that I can recall. Only time would be if accidentally over flowed completely, but then that's only because there's gas outside of the filler tube at the top that spilled over. I'm not sure that it's emptying into the canister, I've seen tank range changes proportional to the amount of gas I've topped off which leads me to believe I do get the benefit of having the extra gas.
I posted the pictures because I've seen a lot of arguments in other threads about how much gas people put in, or how much is possible, what tank range people are getting, blah blah blah so I figured I'd show that this really has happened a few times.
jeremyc74 said:
My truck is one that's affected by the screwed up tank sending unit, so even if it says it's bone dry I only put about 15 gallons in it. That sucks on road trips, but knowing that I have 3 gallons in reserve I'm going to start waiting until it's hit the E for a while before I stop. Not being able to get at least 300 miles on a tank on the highway is a PITA.
At least its better than my car. 13 gallons of E85 means fillups every 175 miles.
And this is the reason why. I do a lot of "road trips" where I'm driving 7+ hours on the highway. A prime example is when I drive to my unfortunately far away located girlfriend's place for a weekend trip, if I top off, I can make the 9 hour trip with 1 stop for gas. If I don't top off, I have to stop 2 times. Now that doesn't sound like a big deal, but when you drive 9 hours on a friday, and are driving 9 hours back on sunday, those extra few minutes of time with your partner (or sleeping on Sunday for work Monday), or without, become much more important. Also when you are sacrificing to make that 9 hour drive a couple times a month for a few months, being able to feel confident you have mastered that route and can do it as quickly and efficiently is important to one's sanity (or at least mine) haha
