Gas light on, only 25 mile range?? How long can you drive on empty?
02-19-11, 11:37 AM
#32
I had a loaner for 3 weeks and I did an experiment! You can go exactly 64 miles after 0 and then you run out of gas.. That was in a 2010 IS250... I Imagine an IS350 would be around 50 miles. I had 2 gallons in the trunk to pour in when it died. Funny, it let me re-start and drive another mile and then it died again. It was fun... poor loaners 
06-18-12, 07:31 PM
#34
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I have driven only 20 after hitting 0.
Hypothesis or fact
1. contaminants etc... may get in our filters and damage parts in our engines
Question
1. if we are using 91 octane, should we still be concern with this intruders/radicals?
My opinion
1. if true that stuff is settled at bottom of tank and can damage parts of car/engine when we use the last 2.5 gallons of gas remaining in our tanks.
2.With hundreds of gallons of gas going into our tanks shouldn't it be the same when car moves, shakes or bounces.
3. Go to the beach, water looks clean but because of waves (water movement) you'll have some/lots of sand particles on body.
I am not an expert.It's just an analogy and opinion here
Hypothesis or fact
1. contaminants etc... may get in our filters and damage parts in our engines
Question
1. if we are using 91 octane, should we still be concern with this intruders/radicals?
My opinion
1. if true that stuff is settled at bottom of tank and can damage parts of car/engine when we use the last 2.5 gallons of gas remaining in our tanks.
2.With hundreds of gallons of gas going into our tanks shouldn't it be the same when car moves, shakes or bounces.
3. Go to the beach, water looks clean but because of waves (water movement) you'll have some/lots of sand particles on body.
I am not an expert.It's just an analogy and opinion here
10-11-14, 09:49 AM
#38
^^LOL! I had that feeling too. I did however drove over 20 miles on my is350 with "0" miles left displaying on my guage. I did wanted to see how much further I could go but I didn't want to risk my fuel injectors and fuel pump for that. You never know what junk is on the bottom of your gas tank....
10-11-14, 11:26 AM
#39
isn't the pump going to be pulling gas from the bottom of the tank regardless? So aren't the only contaminants that are going to be in there coming from the pump? Or (perhaps) water condensing from water vapor that would sink to the bottom anyway? And if it is sinking to the bottom, it will get sucked into the gas line regardless of whether or not your tank is full, no?
Furthermore, water (vapor) is actually an octane booster. People who boost will inject it, mostly to cool the charge, but also to boost octane. Not that injecting a lot of water from the gas tank is going to make your car run better, but it hardly seem catastrophic either. May run rough for a second or two. And again, if the gas is being taken from the bottom, that is going to happen regardless.
As to cooling the fuel pump, do they get hot? It would seem to me the fuel flowing through it should cool it a lot more than some fuel around the casing.
Anyway, when my "go get some gas" light comes on, it also tells me I have around 30 mi. left. I usually don't fill up until that happens. Mostly because I'm lazy. I also did that with my last car, which I had for 12 years. It was a chev, which are not supposed to be reliable, but I had no problems with it. I did run out of gas a couple of times with it, but when I did nothing catastrophic happened.
Furthermore, water (vapor) is actually an octane booster. People who boost will inject it, mostly to cool the charge, but also to boost octane. Not that injecting a lot of water from the gas tank is going to make your car run better, but it hardly seem catastrophic either. May run rough for a second or two. And again, if the gas is being taken from the bottom, that is going to happen regardless.
As to cooling the fuel pump, do they get hot? It would seem to me the fuel flowing through it should cool it a lot more than some fuel around the casing.
Anyway, when my "go get some gas" light comes on, it also tells me I have around 30 mi. left. I usually don't fill up until that happens. Mostly because I'm lazy. I also did that with my last car, which I had for 12 years. It was a chev, which are not supposed to be reliable, but I had no problems with it. I did run out of gas a couple of times with it, but when I did nothing catastrophic happened.
10-11-14, 12:48 PM
#40
found the following on another site
So perhaps the pump will overheat, if run dry. BUT by the same token, unless you run it bone dry no problem, and any contaminants that don't float on gas will be pulled in by the pump almost immediately, including water from condensation. IOW the only problem keeping a 1/4 tank of gas will solve is the problem of no gas station within range of 1/4 tank of gas 
Starting in the Mk4 Supra they came up with a clever design where the fuel pump sat in it's own small reservoir... this avoids several common problems with fuel pumps-
1. The problem where with low fuel the pump isn't being properly cooled... since you'd now have to run it to pretty much bone dry to exhaust the fuel in there cooling the pump
2. The problem where the pump sucks air because the level is low, the tank is poorly designed, and when you floor it all the fuel sloshes to one end, away from the pump pickup.
The ISx50 uses this same design.
1. The problem where with low fuel the pump isn't being properly cooled... since you'd now have to run it to pretty much bone dry to exhaust the fuel in there cooling the pump
2. The problem where the pump sucks air because the level is low, the tank is poorly designed, and when you floor it all the fuel sloshes to one end, away from the pump pickup.
The ISx50 uses this same design.
10-12-14, 04:56 PM
#41
I had an E46 330ci ZHP and it started counting BACKWARDS once I passed "0 Miles Left" Seriously...it was on like "-6 Miles left" when I pulled into the gas station.
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