Not your normal Fuel Saving Tips

Not the normal Tips.

TIPS ON PUMPING GAS (Good information)

Hhere are some tricks to get
more bang for your buck.

Only buy or fill up your car or truck in the early morning when the ground
temperature is still cold. Remember that all service stations have their
storage tanks buried below ground. The colder the ground the more dense the gasoline, when it gets warmer gasoline expands. So buy in the afternoon or in the evening. A 1-degree rise in teperature is a big deal for this business.

When you're filling up do not squeeze the trigger of the nozzle to a fast
mode. If you look you will see that the trigger has three (3) stages: low,
middle, and high. In slow mode you should be pumping on low speed, thereby
minimizing the vapors that are created while you are pumping. All hoses at
the pump have a vapor return. If you are pumping on the fast rate, some of
the liquid that goes to your tank becomes vapor. Those vapors are being
sucked up and back into the underground storage tank so you're getting less.

One of the most important tips is to fill up when your gas tank is HALF
FULL. The reason for this is, the more gas you have in your tank the less
air occupying its empty space. Gasoline evaporates faster than you can
imagine. Gasoline storage tanks have an internal floating roof. This roof
serves as zero clearance between the gas and the atmosphere, so it minimizes the evaporation. Unlike service stations, every truck that we load is temperature compensated so that every gallon is actually the exact amount.

Another reminder, if there is a Fuel truck pumping into the storage
tanks when you stop to by the station, DO NOT fill Up. The fuel being pumped in to the tanks may be stirring up the trash that has settled over time.
Try these out hope they help.

 

i love tips #1, 2, and 4. i have a question about 3 though. i agree that you will have less evaporation when you only let the tank get down to half before you fill it up. but in the end, won't the extra gas(extra weight) in your tank hurt the mileage more than if you let your gas level go down to 1/4 of a tank or further?

don't get me wrong, I'm not trying to shoot your idea down, I'm just curious. and if anyone has tried both ways of handling fuel levels, I'd be interested to know what you found out.

great post though, they make sense. especially the last one.

 

Has someone every done calculations on number 1? I know gasoline expands, with tempature rise (like most everything) I just don't feel like looking in my old physics and chemistry books to calculate it. The thing is that tanks are burried deep enough that the fuel temp is almost constant.

For #2 I am also wondering just how much vapor is siphoned by a fast fill vs. the longer filling time allowing more gas to evaporate (per #3)

I'm not saying that these tips don't help. Just wonder how much that actually do, and for a few pennies of gasoline I don't worry too much.

 

When I go back to work I will ask some of the guys in production. The are always monitoring the fuel temp and trying to keep it to a 1 degree temp. diff. The way they act it seems that it is a significant difference. They are always talking about making sure they put an exact gallon in the tanks, seems to be very important alarms are forever going off when the temp changes in the slightest. I am not the man in this case with the answers, but I'll do my best to find out.

Colinb17
I never thought of looking at the #3 that way it makes sense. In that case it seems it may be better to keep your tanks nearly empty and fuel up more often.

 

The other thing about #3, I don't see where the gasoline would evaporate TO. It's (supposedly) in an airtight container, the gas tank. I could see there being higher evaporation if your gas cap were faulty but I don't see how it could just evaporate, especially if you fill it up first (no air space).

 

...I can see the truth in all of it. But - you're splittin hairs (and very thin ones). The benefit you'd see in any of it would be LESS than that of bumping up the air pressure in your tires a couple lbs.

Way too many variables...

 

I suppose with doing all of that you could save up to $1.50/mo on gas. thats $18.00/yr. folks!! ...

 

For the most part, I think it's bunk.

A 30 degree difference in gasoline temperature would result in a difference of 2% in volume (about 1/2 gallon if you filled your tank). But you'll never see that kind of temperature difference inside the tanks (the fuel is cool even on a hot day). The ground temperature around an underground tank won't fluctuate much even with drastic differences in air temperature. It certainly won't matter what time of day you buy the gas.

This one just doesn't make sense to me. How does pumping slower minimize vapors?

Your vehicle contains vapor canisters that captures the vapor and feeds the fuel back into the system. You'll probably cause more loss by opening the gas cap to refill more often.

 

I'm with Robrjohnson on this one.

 

Very good point.

 

IMHO the only valuable hint listed here is to not fuel up while or soon after the station gets a shipment of gas....

Then again... In the winter the delivery truck is exposed to extreme cold which would make the gas denser and you might get a bit more energy if you buy it before it normalizes to the underground tank's tempature.

 

The reason that the people filling tanker trucks are so worried about temp is that the fuel is most often stored above ground and the expansion can rupture a large tank if it's not compensated for. (Imagine putting 50 degree gas in a tank on a 90 degree day and not leaving enough of a void for it to expand. That tank would either rupture or spill (if it has a pressure release)

The gas station pump has a vapor recovery system where it scavenges gasoline vapors from your tank so that they aren't released
into the atmosphere. It's all to help stop manbearpig. I thought that charcoal canisters were done away with due to how modern fuel injection works, the system is designed to operate under pressure.

 

REPOST* I already posted these tips plus a few more with tons of feedback from tons of people; some of which work with fuels.

search...

 

Here's the thread he's talking about: http://www.tacomaworld.com/forum/technical-chat/4450-little-gas-good-thing.html.

I agree with Roland, last tip is the only one that seems right to me. There does seem to be some truth in the "filling up in the morning" tip though.

 

I cant relate to this post because I currently live in Jersey and it is unlawful to pump your own gas in this shit state.

 

i let my wife fill up on tuesdays when the local station has ladies tuesday 5c off super

 

Just got my truck about 1 1/2 wks ago. was reading the owners manual and seen that u can pretty much run any octane fuel in it. what are most people running? or what would be best for it? im sure plus or premium, but can u run 87 in it all the time?

 

You can run the 87 in your V6 with no problems but you won't get the same performance as with the higher octane. The I4 engines are quite happy on 87 and unless modified don't perform measurably better with the more expensive fuels.