Disposing of old petrol

[Pondrew]

Help me out here people....
I want to get a nearly full tank of petrol out of a car as I have no idea what it is, or how long it's been in there (I think it's at least 3 years).

I can get 20 litres out and put it in a jerry can, but how can I dispose of it? I can't keep it as I won't use it and I only have one jerry can anyway, so I need it for the rest that is in the car.

OR...
Do I just leave it in the car (it runs OK with it) and when I eventually start using it, just keep topping it up with better fuel to dilute the old crap?

I don't really want the old petrol going through my engine, as it had a major engine service just as it came off the road 18 months ago.

[Usel]

https://ukfueldoctor.co.uk/essex/fuel-c ... -disposal/

Or give to a farmer or gardener

[PerryGunn]

As the car runs OK on it, the fuel hasn't completely degraded so, assuming the tank holds about 50L, I'd buy another 20L Jerry can and fill that, then refill the tank so that you're diluting the older petrol at at least 4:1 - then keep refilling as normal but leaving enough room to add the last 5L or so from one of the Jerry cans.

Petrol's too expensive to waste.

Alternatively, put it in your wife's car - you'll probably be selling that before you get through all the fuel....

[Stevo1987]

House of Commons and a match?

[Zedebee]

The petrol in your tank is unlikely to have significantly degraded. It’s quite a stable product, except when you ignite it in the presence of oxygen. Petrol sitting in pipes for a prolonged period is more likely to attack the pipes (if rubber /plastic) and contain dissolved material, but you will have run that through if running the engine occasionally.
If I were you I would take 20l out in your Jerry can and fill up with fresh petrol, then put back in 5l with each tank to use up the old petrol.
If you’re really not happy to use it, you can dispose of it in the oil bund at your local tip.

[TitanTim]

If the car runs fine and the fuel is only a few years old it should be fine, as suggested drain it off and use it in another vehicle. Shame to waste it.

I imagine some of the fuel in my old M140i was sitting in it for years as it did so little mileage, car always ran fine.

Tim.

[pvr]

I had issues with the fuel filter of the Golf that had petrol for a number of years in it, but once I replaced the filter - the petrol was absolutely fine. I did add some stabiliser in it. Note that it is E5 though, no the watery mess of E10

[Pondrew]

I did add some stabiliser in it. Note that it is E5 though, no the watery mess of E10

What is this stabiliser you speak of Paul?
I have no way of knowing what fuel it is, other than I know it's petrol and not diesel. It could be 4 star for all I know.

[Pondrew]

you can dispose of it in the oil bund at your local tip.

I didn't know this, thanks. Knowing my local tip, they will probably have a host of reasons why I can't get rid of it, or try to charge me (on top of the £3,500 p/a I pay the bastards already in Council tax).

edit: just checked and there is a 5 litre at a time limit. That's fecking useful.

[enuff_zed]

I have no way of knowing what fuel it is,

Peer down the filler cap and check the colour of the fuel.
You'll probably need to light a match to see it.

[pvr]

Excellent test. If it is E10, there will be so much water floating on top that there are no fumes.

In any other case, well, at least you knew

[PerryGunn]

Excellent test. If it is E10, there will be so much water floating on top that there are no fumes.

Water would be at the bottom - it's denser than petrol...

[pvr]

Shush, no need to point that one out

[pvr]

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I did add some stabiliser in it. Note that it is E5 though, no the watery mess of E10

What is this stabiliser you speak of Paul?
I have no way of knowing what fuel it is, other than I know it's petrol and not diesel. It could be 4 star for all I know.

[PerryGunn]

Redex isn't actually a fuel stabiliser, it's an additive that claims to help clean the system and improve combustion.

A proper fuel stabiliser is something designed to prevent fuel degradation during long-term storage
e.g. this one on Amazon

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