ECO gas tank question

It's an artificial shut off limit.

Don't flood the charcoal canister and you'll be fine.

Will do, I'll probably shoot for a total of 15 gal to be safe and not overfill

I've put 17 in mine before! Lol

jblackburn said:

It's an artificial shut off limit.

Don't flood the charcoal canister and you'll be fine.

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Hold on what do you mean? My old 12' Cruze even at E would never take more than 13 gallons because of a false limit? That means even though the needle is at the full marker it could take another 2 Gallons?

My 16' Cruze is pissing me off because it has a smaller tank and I only get about 300 miles(City/Hwy) before I burry the needle in at the E line but it only takes 12.5 Gallons. So does this mean I can keep clicking the fuel till it gets up to the 13.75 marker?

Dunno about the new Cruze.

The Eco is artificially limited to 12.6 gallons when it's still a 15.6 gallon tank that all the other Cruzes use. It saves weight for that extra 1 MPG city.

The most I've put in my Cruze LT with a 15.6 gallon tank was 13.9. Range was on "low" for some time. 13 is pretty normal close to "E".

larlar75 said:

Hold on what do you mean? My old 12' Cruze even at E would never take more than 13 gallons because of a false limit? That means even though the needle is at the full marker it could take another 2 Gallons?

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Yep. I've put up to 16.1 gallons into my ECO MT.

jblackburn said:

Dunno about the new Cruze.

The Eco is artificially limited to 12.6 gallons when it's still a 15.6 gallon tank that all the other Cruzes use. It saves weight for that extra 1 MPG city.

The most I've put in my Cruze LT with a 15.6 gallon tank was 13.9. Range was on "low" for some time. 13 is pretty normal close to "E".

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Crazy! I will see how much my 16 can take next time I fill up. I'll be that guy *click* *click* *click*

larlar75 said:

Crazy! I will see how much my 16 can take next time I fill up. I'll be that guy *click* *click* *click*

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I actually tried that just once, and nearly overflowed the new one.

The real trick is finding a gas station with good top-tier fuel that you can actually get a pump to fill slowly enough to top off the tank. If you're not into top-tier gas, it's still the trick of finding a station with pumps that will fill slowly enough to trickle those last 2-3 gallons of fuel into the tank, while taking longer for the last 2-3 gallons taking longer that the fill-up AND cleaning your windows... LOL

That's crazy ndwood, what year/model is your car? And were you running on fumes coasting into the gas station?

Almost have to question when the last time that pump was calibrated lol

12' Eco I had about 30 miles worth of fuel left @ this fill up, so a little over 1/2 Gal before the sender stops picking up fuel. I've done the Lt/Ls fuel sender swap, so it takes the full 15.6 before I have to trickle fill the rest. This isn't the first time I have put over 17 in it. But I have rolled to the gas pump on more than one occasion. Lol

How do you not blow your fuel pump? I feel bad letting it hit E but dang!

I'm not much of a believer that running a tank empty is necessarily bad on fuel pumps. Especially newer vehicles. Safeguards have been implemented to protect pumps from overheating, such as the foam sleeve they put on modern pumps. They ensure that the pump has constant cooling no matter how much fuel is in the tank.

ndwood626 said:

I'm much of believer that running a tank empty is necessarily bad on fuel pumps. Especially newer vehicles. Safeguards have been implemented to protect pumps from overheating, such as the foam sleeve they put on modern pumps. They ensure that the pump has constant cooling no matter how much fuel is in the tank.

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I don't know how much cooling that would provide, I suspect the reserve capacity is more so designed to protect the pump. My Gen 1 1LT had the 15.6 gallon tank(no restriction), On more than one occasion I had the low fuel warning com on right as I was pulling up to a pump. Every time it was 13.1gallons fuel burned, that leaves 2.5 gallon reserve at low fuel warning.

I suspect 99% of people out there are not waiting until the low fuel warning or driving much past that, so the fuel pump should never have much under 2 gallons unless you ignored all indicators the tank is low(The Gauge, DIC low fuel message, and orange low fuel light). That's besides any stops you make the DIC low fuel warning coming on every time you start the car.

The pump actually sits in a plastic bucket which is full of fuel. I'm sure it stays cool even when very low on fuel. I believe the Cruze has about a gallon of fuel left when the range goes to zero. The FLVV is shorter on the regular Cruze than the Eco manual. There are FLVV's on eBay that're about 1/2" shorter than the 15.6 FLVV, and they are less than $20 delivered. I just installed one in my '13 Eco. I only have on fill up on it, but so far, so good.

Gus_Mahn said:

The pump actually sits in a plastic bucket which is full of fuel. I'm sure it stays cool even when very low on fuel. I believe the Cruze has about a gallon of fuel left when the range goes to zero. The FLVV is shorter on the regular Cruze than the Eco manual. There are FLVV's on eBay that're about 1/2" shorter than the 15.6 FLVV, and they are less than $20 delivered. I just installed one in my '13 Eco. I only have on fill up on it, but so far, so good.

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What does it do exactly?

The FLVV is the Fuel Level Valve Vent. The shroud points down and controls the venting of air as the tank is filled. When the fuel level reaches the shroud air stops venting through the main tank vent, cause gas to back up in the fill pipe and triggering a pump click off. The longer FLVV on the ECO MT's gas pump is responsible for the 12.6 gallon "full" rating for this tank - it causes the first click off to occur 3 gallons before the tank is actually full.