Full tank of Gas? How much weight does it add, ...or does it make a difference? Options

[amysmojo]

How much weight does a full tank of gas add to our Celicas? Does it slow them down at all, or does it even weigh enough to matter?

I looked online & found a bunch of different answers for how much a gallon of gas weighs...some say 6.5lbs some say 8lbs. So I have no idea if a full tank adds 78lbs or 96lbs to our car. Someone help Maybe ill start driving around w/ only 2 - 3 gallons @ a time haha....(unless im on a road trip of course)

Oh & if this is a repost..then oops

[Alchemist_57]

i can't exactly tell, unless you're able to tell me the density of the fuel u use, it can vary with octane.

[TheRockman]

I believe density of gasoline changes depending on it's temperature. From what I read, the weight of gasoline at 72 degrees F is approximately 6.25 lbs per gallon.

So a little math: my GT has a 15.9 Gallon tank. If it is completely full, the weight of the fuel (at 72 degrees) will be approx. 99.375 lbs. Keep in mind, the colder the fuel is, the more dense it will become (thus heavier). The warmer the fule, the less dense (thus lighter).

Hope that's right. Anyone else have any ideas on the matter?

[Alchemist_57]

i think TheRockman got it right.

So, let's round off the celica's tank to 16gal. even. It's filled to the brim. At 72 degrees fahrenheit, the fuel in that tank will weigh exactly 100lbs.

And like he said, the weight will vary with the temperature.

[CelicaZR]

I dont notice that much difference in performance wise,
when having a full tank or not.
But I wish the fuel gauge never goes down

[95celgt]

16 Gallon tank?! mine is only 12.6 gallons everytime i fill them up from empty? If i add more it will overflow..

[Fate]

yeah but the question- is that when it's on E, or below E-cuz' when it's on E there is still 4 gallons left.

[o0black0o]

You mean when the gas light comes on?

[lilsteeg]

I believe density of gasoline changes depending on it's temperature. From what I read, the weight of gasoline at 72 degrees F is approximately 6.25 lbs per gallon.

So a little math: my GT has a 15.9 Gallon tank. If it is completely full, the weight of the fuel (at 72 degrees) will be approx. 99.375 lbs. Keep in mind, the colder the fuel is, the more dense it will become (thus heavier). The warmer the fule, the less dense (thus lighter).

Hope that's right. Anyone else have any ideas on the matter?

that sounds right

yeah but the question- is that when it's on E, or below E-cuz' when it's on E there is still 4 gallons left.

is that true, if so then i had no idea

[o0black0o]

I think once the gas light shows up you have around 3 gallons left. On Empty like 1.5 I assume.

[dustin15brown]

I think when mine gets down a lot again i'm going to have it cyphened out and see exactly how much

[TheStreetzKing]

is this a reason why u drag with a 1/4 tank of gas? weight reduction

[RocketScott]

By adding weight to the gas tank you actually move the center of gravity lower and more toward the center of the car thus improving handling. I wouldn't know how to quantify the improvement but it could be significant given the added 100lbs.

[crismillencolin]

By adding weight to the gas tank you actually move the center of gravity lower and more toward the center of the car thus improving handling. I wouldn't know how to quantify the improvement but it could be significant given the added 100lbs.

lol i disagree , very first time i filled my prelude up (full tank) i lost the end on a corner i've taken(faster) thousands of times before and since , my only thought at the time was that the full tank had made the rear of the car heavier . Maybe not but it was the only thing different.
anywho
That was the end of that honda adventure !

[RocketScott]

By adding weight to the gas tank you actually move the center of gravity lower and more toward the center of the car thus improving handling. I wouldn't know how to quantify the improvement but it could be significant given the added 100lbs.

lol i disagree , very first time i filled my prelude up (full tank) i lost the end on a corner i've taken(faster) thousands of times before and since , my only thought at the time was that the full tank had made the rear of the car heavier . Maybe not but it was the only thing different.
anywho
That was the end of that honda adventure !

Tire pressure, road/tire temperature, inexperience driving with full tank of gas. Could be anything. The physics of it are fairly simple though.

To illustrate this another way: My truck rear end slides around fairly easy if it's unloaded. When I put all my tools in it's almost impossible for the engine to spin the rear tires or cut loose in a corner.

[crismillencolin]

By adding weight to the gas tank you actually move the center of gravity lower and more toward the center of the car thus improving handling. I wouldn't know how to quantify the improvement but it could be significant given the added 100lbs.

lol i disagree , very first time i filled my prelude up (full tank) i lost the end on a corner i've taken(faster) thousands of times before and since , my only thought at the time was that the full tank had made the rear of the car heavier . Maybe not but it was the only thing different.
anywho
That was the end of that honda adventure !

Tire pressure, road/tire temperature, inexperience driving with full tank of gas. Could be anything. The physics of it are fairly simple though.

To illustrate this another way: My truck rear end slides around fairly easy if it's unloaded. When I put all my tools in it's almost impossible for the engine to spin the rear tires or cut loose in a corner.

lol i think i was just looking to blame something other than my driving

[95celgt]

my gas light usually come on when I hit 1/4 of a tank, and when i fill it up it right at the E and only 12.6G to fill up?

[amysmojo]

my gas light usually come on when I hit 1/4 of a tank, and when i fill it up it right at the E and only 12.6G to fill up?

serious??? mine light wont come on until it hits E....I think most everyones on here is like that

[BlackCelicaGT94]

128 oz = 1 gallon

16 oz = 1 pound

128/16 = 8 pounds per gallon

If my math is correct then a full tank if its about 13 gallons = 104 pounds.

DOes that math look right yall?

is this a reason why u drag with a 1/4 tank of gas? weight reduction

i think its cuz of weight and the fire department requires this so that incase ur car catches on fire you dont have a full tank of gas in there!

[boosted_K2]

celica fuel tank is 15.9 gallons

http://auto.consumerguide.com/Auto/Used/re...carreviewspecs/

and yes the reason people race with low fuel is because of weight, there is nothing reguarding safety or fire hazard.

the only problem is you can run into issues with starving your fuel pump if you run too low due to sloshing and shifting of the fuel inside the tank, it also can begin to vaporize further increasing the chance of starving the motor. my friends saturn SC2 has a very well designed fuel tank and he has run many autox events when the fuel light has been on all day long, though i wouldnt recommend it. personally i try to run between 1/4 and 1/8 of a tank. but in all honesty the difference is negligable and you wont see a difference unless your skill level has hit a plateau and you are running very consistant times.

oh and if i remember correctly you are mixing fluid ounces with a weight ounces that only works with distilled water nat

This post has been edited by boosted_K2: Feb 20, 2006 - 6:00 PM