Micaiah

Ummm....correct me if I'm wrong but isn't it damaging to the fuel pump and injectors if you let it run till almost out or where you are 'running on fumes'? I try not to let any of my cars go down past 1/4 tank. 1/8 at the most.

meefer

iTrader: (8)

Same story pretty much in my 250, 0 miles on range computer = 15.1 gallons pumped. I have taken it past 0 a lot of times but have never run out completely. The most I've ever gotten on a tank is 470-ish I think. I can't remember I've got way too many miles to remember. But my avatar is an undoctored photo of what the car THINKS it can do on a tank.

Raralith

Running pretty low would very, very slowly kill the pump since it has to work harder to pump fuel compared to a full tank where you can let the weight of itself push the gas down. As for when you run out of gas, yeah that's pretty bad for everything, especially the cat's I believe.

rizzy

iTrader: (7)

I've gone about 26 miles past '0 miles' remaining. I forgot how many gallons I had to put in to fill up.

I have about '20 miles' on this tank, so I will see how many gallons it takes.

BlkSapPrl7

I never let my tank get below 1/4 tank for two extremely important reasons!!!

One: the pump motor uses the fuel to cool the motor

Two: depending on if the motor is pulse width modulated which helps control fuel pressure. And to protect the motor. Average fuel pump motor draws a lot of amps under normal operating conditions with >1/4 tank of gas and spins at a certain rate with the friction caused by the fuel. With low fuel to no fuel. The motor has nothing slowing it down and it spins much faster thus burning out the motor.


also you risk the lever sticking from rubbing the bottom of the tank especially with debris settling.

Sango

iTrader: (10)

I have to agree with close to 2 gallons because I did the calculations (think it is correct) based on what the readouts gave me.

Trip : 396 Miles
Tank Avg: 27.4 MPG

396 M/27.4 MPG = 14.5 (Gallons used)
17.1 - 14.5 = 2.6 Gallons left.

So I guess I could of travalled an extra 20 miles based on the above if I really needed to.

Snubbles

iTrader: (2)

Yeah thats what i think too

juice14

if its on the highway, you can drive over 35 miles after it says "Range 0".. I dont remember whats the most ive done, but 30 miles after it says range 0 you are good.

BlkSapPrl7

so is the question how low before your car dies or whats the lowest your tank can be without burning out your fuel pump motor??

2slow

iTrader: (5)

Never go until the light turns on. The fuel is what cools down the fuel pump. Driving until the light comes on will overheat the pump and will wear faster than pumps that stay above the 1/4 mark.

Kurtz

iTrader: (1)

Actually, ever since the Mk4 supra Toyota has been using a fuel pump/tank design that has a small reservoir with the pump in it holding fuel to keep it cool... so you can run much lower than 1/4 tank without any harm.

See posts 23-26 for an explanation-

https://www.clublexus.com/forums/is-...ccuracy-2.html

You'd still wanna refill by the time the light comes on though to be safe, but you're certainly doing no harm to the fuel pump in the 1/8-1/4 tank range on these cars.

Sango

iTrader: (10)

I would say more like both. In any case I would not want end up out of luck and end up damaging the motor.


Ahh ok, I typically would stay around the 1/5, but since 1/4 is better for the car, I can change to suit it.

Sango

iTrader: (10)

Cool thanks Kurtz for the link.

TokerIS350

iTrader: (13)

I did this Monday, that's about right

Chadley6mt

iTrader: (1)

I ran it down to 0 approx while going 60km/ trying to get to the gas station. ill never do that again.