Premature low fuel light

[DoomsdayJesus]

Originally Posted by jakev9041

I'm a pilot and no pilot will EVER trust their fuel gauges, visual check is a must. Further, every tank has a certain unusable fuel quantity as in there is a certain volume of fuel remaining in the tank that cannot be used to supply the engine, airplane manufacturers have to publish these numbers in the pilot operating handbook, and some even put it in the brochure. Just look at this web site: http://www.diamondaircraft.com/aircraft/da42/specs.php
Fuel capacity, total / usable 79 gal / 76.4 gal

Cars are no different, but manufacturers have not ever published or made known the usable fuel, so a word to the wise: a certain % of the total fuel capacity of your fuel tank is unusable & to drill it in, any pilot who trusts a fuel gauge ought not to be a pilot.

I wasn't referring to fuel gauges. I was just referring to the general aviation idea that if you're unsure of your position, trust your gauges. Not necessarily fuel gauges.

[DoomsdayJesus]

Originally Posted by BlueDubbinTDI

Mine comes on, I fill up, and its always 10.6 before the pump clicks. That's a shitload left so I feel you OP. Granted I've only filled up twice since Ive had her lol. 24 and 25mpg average :/

Your mileage will get a lot better after the engine break-in.

Originally Posted by RurumariGhost

I fill up at 1/4. I worry about suspended particulates getting into the engine if i go much lower. Given I buy high quality gas and am probably being ocd, but better safe than stranded

That's why we have fuel filters.

[mav1178]

Originally Posted by Sarlacc

That is a shame, I had thought they would design the fuel tank with high G-forces in mind.

Impossible for a street car, for packaging and weight distribution reasons.

Usually for a high-performance street car, there would be a dry sump oil pump but nothing special for fuel. No manufacturer would assume you to run aggressively on a near-empty tank...

-alex

[ntron1]

Thought I would push the limits. My Torque App reading the OBD2 data stream said there was 2.2 gallons left when the low fuel light came on @ 410 miles. When I filled up @ 437.3, the OBD2 said 1.6 gallons remaining. Took 11.983 gallons with 2 clicks of the pump to fill it up.

Apparently, I need to use a few more rev's.....

[jakev9041]

@ Doomsday Jesus, modern day pilots entrust the go perfectly straight machine, aka the GPS! But I understand what you meant now.

[ntron1]

Originally Posted by Marchy

flat roads must be nice lol

Change elevation by 700 feet twice every day and very little traffic. Some days I can make the 17.5 mile run to work and never touch the brakes or downshift to reduce speed. Neutral on the way down accelerating from 45 to 70 without touching the pedal. Much more being 47 and having a real go fast car to play with that struggles to get 17 mpg on a good day. The BRZ is just a casual daily driver.

[Dadhawk]

For those of you pushing this to the limit, you might want to pick up some of this from Woot today.

Of course, after reading the CAUTION below, I think I'd rather push my car than take a chance on this stuff.

[DeeezNuuuts83]

For that price, you might as well just buy a little red tank with real gas.

[BlueDubbinTDI]

Originally Posted by DoomsdayJesus

Your mileage will get a lot better after the engine break-in.

Ha...break in...since this is a lease I've decided to give the middle finger to the break in period and throttle it out probably every other day. She's got 900 miles on her. Should I still expect to see better mileage around the 2000 mark?

[BlueDubbinTDI]

Shooting for a new low atm. Currently at 29.9mpg (automatic) on the avg clock halfway through the tank. Here's to hoping I havnt screwed the break in ability of this car lol. However I have seen some 21.8 fuely averages around the forums so atleast its not that bad.

[996garage]

Is this early fuel light warning a Subaru thing? Of the 14 cars I've owned, I've never seen a fuel light go on so early either... only happens with my 04' WRX and my BRZ.

[qoncept]

Originally Posted by 996garage

Is this early fuel light warning a Subaru thing? Of the 14 cars I've owned, I've never seen a fuel light go on so early either... only happens with my 04' WRX and my BRZ.

The light on my 04 WRX didn't come on so ridiculous early. Or, at least, the gauge read nearly empty. Best I ever did was 375 on a tank.

[Dadhawk]

Originally Posted by BlueDubbinTDI

.. Should I still expect to see better mileage around the 2000 mark?

Originally Posted by Marchy

mines stayed about the same over nearly 5k miles,

I've documented my fuel usage in my Owner's Journal. I would say there hasn't been a significant increase over the near 20K miles I have on it, although the average has risen over time. In the first 3,000 miles I average right around 31.8, and in the next 17,000 miles I've averaged 32.5. Nearly all the driving has been straight commuter "stuff", and spirited road driving on occasion.

[DoomsdayJesus]

Originally Posted by BlueDubbinTDI

Shooting for a new low atm. Currently at 29.9mpg (automatic) on the avg clock halfway through the tank. Here's to hoping I havnt screwed the break in ability of this car lol. However I have seen some 21.8 fuely averages around the forums so atleast its not that bad.

The Avg. MPG clock is pretty generous. My fuelly fill-ups show actual MPG at least 1-1.5 MPGs lower on a regular basis. I could actually adjust average MPG on my Outback with the easter egg menu, but I haven't seen anything on how to adjust it on my BRZ.