Disposal of Old Gasoline ...?

[Wild Bill Hiccup]

Never had this problem before.
Here, on the island, I drive much less than previously on the mainland.
Plus, tropical lawn grass grows much more slowly here, than northern tier states' lawn grasses.
Because of the high miles I used to drive, my vehicle has a large 22 gal. fuel tank.
I don't fill it very often anymore.
I stored  4-5 gals of gas for the lawn mower maybe 9 months or more ago in a plastic fuel can, has a nozzle and is not sealed.
Heat buildup in the storage shed is probably also part of the problem.

Because of my being lazy and the lawn grass growing slowly, I finally need to mowed lawn again.
The mower has a sealed tank and started up easily.
I added fuel from the plastic can.
Mower ran for a few minutes, then died.
The added fuel is obviously the cause.
I'll get a sealed steel can for future storage, keeping less than 5 gals.
I need to get rid of about 5 gallons of no ethanol gasoline.
Mixing it 1:1 with new gas should should make it OK for engine use.
But, I do not trust the possible reaction from mixing it into my vehicle.
Getting rid of old gas has it's problems.
Any suggestions?

[HawaiiEV]

Fire?

[Wild Bill Hiccup]

Ok got a plan.

When I moved her, fool that I was, I threw all my Jerry cans out, and bought a plastic can locally.
Just ordered a steel 5 gal NATO fuel can, lid, and spout for my gas storage.
The old U.S. military cans are getting hard to find.
Plus, those selling them seem to think they're made of gold.

Car has a sealed tank.
Fuel should and does seem to keep for long periods.
I'll add a couple of gallons of the old fuel to its tank every time I add 5 gals. or more.
Should use it up that way.

[terracore]

About 2 weeks ago I put some 18 month old gasoline into my car. It's ran fine, it's all used now.

I put PRI-G into the plastic can when I stored it. I didn't intend to store it longer than a year, it got misplaced by accident.

You can also put PRI-G into gas after it's stale and bring it back to life.

Also, I never store fuel with ethanol in it.

[Wild Bill Hiccup]

I  only store fuel for yard machines.
I never use ethanol in them, ever.

Doing a bit more online checking, the consensus is that stabilizers work best on new, unaged fuel.
Their effectiveness diminishes as the fuel degrades.
An age degraded fuel (gasoline) is considered to be unusable.
Stabilizers cannot add the evaporated volatiles required to run an engine, assuming there are no actual storage related changes in composition.

I'm thinking the heat generated in the shed is probably the cause of the gas going bad so quickly.
The gas may have been  relatively old to begin with when bought.

Going to drain the mower's tank, add it to the car's tank, get and add a couple of gallons of new gas to the mower, should fix the problem.
Should only need to worry about getting the old gas out of the carb.

EDIT;
Quote:
About 2 weeks ago I put some 18 month old gasoline into my car. It's ran fine, it's all used now. ...

How much fuel you added and how much was already it the tank are the probable reasons it worked.
Plus, a car's engine may be more forgiving.

[My 2 cents]

Question 1.  Are you trying to dispose of the bad gas in the most environmentally friendly way possible, or are you trying to get some positive use out of it, or perhaps both?

Question 2.  Will either of these goals be achieved by burning it up in your car’s engine?

Let’s say your car gets 30 mpg, so 300 miles on 10 gallons of gas.  If you add a gallon or 2 of funky fuel that won’t run an engine on it’s own to 10 gallons in your tank, would you expect to get more than 300 miles, or less because the 10 gallons of fresh gas is now doing more than just pushing your car, it’s also powering an incinerator?

And since your car’s engine is not designed to be an incinerator, how clean will the resulting emissions be?

I’m not trying to rattle anyone’s cage, I’m just curious if anyone has thought about it from this angle.

[terracore]

"Plus, a car's engine may be more forgiving."

A modern car's computer should be able to adjust the fuel injection to handle a wide range of fuel qualities.

I had a sedan and accidentally put "premium" fuel in it instead of the 87. The computer recognized the difference and the check engine light came on, but the car ran fine. At the next fill I put 87 in and the light turned off. I wasn't expecting an "upgraded" gas to do that, but the owners manual did stipulate to only use 87.

"How much fuel you added and how much was already it the tank are the probable reasons it worked."

It was about 50/50. Granted, I have an E85 so the car is engineered to use crap fuel by design.

I wouldn't put old gas in my 95 Dakota. Because I drive it so seldom the gas ages in the tank on it's own. I use ethanol free and PRI-G just to be safe.