Originally Posted by carLx

But, I've heard in passing that you can potentially damage your car by running on too low fuel (well below when the display hits 0 miles). I do not know the mechanics of this, though. If someone could clarify why (and if) this is the case, it would be interesting to hear.

That's why I said 10 miles. Regardless of whether these claims are true or not (that is, it's potentially harmful to run on literally, say, .2 or .3 gallons of fuel) going an extra 10 miles (half gallon) would still keep 2 gallons in the tank and hopefully avoid these potential problems.

But, once again, I can't even begin to tell you what the potential problems could be, I simply vaguely remember it being mentioned a while back. Hopefully lobuxracer or someone else can chime in.

Originally Posted by carLx

I took my car down to exactly 0 and when I filled up at the tank, I filled up exactly 14.699 gallons of gas.

Exactly (I did not pump in any extra to "overflow", it stopped naturally at 14.699). Well, that's awfully close to 14.7. I presume the car was designed to use 14.7 gallons of gas until the display hit 0.

What's the fuel tank full capacity? 17.2 gallons.

17.2 - 14.7 = 2.5

Very nice, round number.

Originally Posted by Kurtz

In older cars the fuel pump, sitting in the gas tank, was cooled by the fuel... and if you let it run much below 1/4 tank you risked overheating the pump or even running it dry if the fuel sloshed away from the pump during start or stop/

Since the MK4 supra at least Toyota/Lexus has used a better design that keeps the pump in a sub-tank of fuel such that it wouldn't be a problem.

See posts 23-26 or so in this thread for pics and details-

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