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[decaman]

What is the best/safest/cleanest method of removing the old petrol from an 80 CJ's tank?

[willo]

be feckin careful, and remember its the fumes that are the dangerous part. An empty tank is way more volatile than a full tank

[decaman]

What's the best way or is it to pay someone else to get blown up?

[Nosebolt]

to what end?

if to just clean it the more fresh petrol will normally do, but have also used something with a higher evap like thinners to rinse then left an airline in it for a few hours to blow out the fumes

if you need to work on it (weld it) the fill it with water and leave it full while you weld it.

[wildwood]

Empty out tank and put 1 bag of dry ice in .

Dry ice will evaporate and remove all fumes and dangerous shit..............

[Bishops Finger]

Did someone say Uriah Heep concerts...

[decaman]

Diluting it with newer juice probably best. Just old petrol, nothing too sinister in it, that I'm aware of. Cheers.

[Dutch]

Are these petrol additives like Redex any good to clean tank, fuel system, carb etc...?

[wildwood]

Best to ditch old fuel cos it goes like varnish and change fuel filter and use injector/carb cleaner....... nothing worse than a spluttery old carb on a motorway

[decaman]

So how would you go about that? Procedure, disposal, etc.

[wildwood]

Best to remove tank and drain into old bucket for use as firelighter at next bonfire at the bottom of garden

[decaman]

Ha!! Like it, neighbours, not so much.