Aspen 4 is (if I am correct) naptha.
I use naptha panel wipe in my coleman stoves and lamps. (It's also the same as Zippo lighter fluid.)
Delete/correct/flame me as appropriate.
Nope, it is not naptha (which is a very broad brush description).
It is an alkylated fuel, chemically created. Not a simple distillation of crude oil.
What is alkylate petrol?
Superb stuff. I use it when doing small jobs with my strimmer, brush cutter and two chain saws. You can leave it in the tank, carburettor etc. indefinitely.
Also used when I lay up my small 4 stroke generator, used in my campervan, after each trip. I.e. syphon out remaining E5 petrol, run carb. dry, Top up with a bit of Aspen, restart, let it run a bit until ordinary petrol all gone. Lay up. Starts first or second pull every time.
I run all these things on super unleaded (E5) usually. But drain that afterwards and flush through with Aspen if not going to use them again for a week or two.
I buy about 5l/year for all of this. Find your stockists at
Aspen Alkylate Petrol | Alkylate Fuel | Aspen Fuel I paid about £18 last time. Or you can have it delivered for maybe £30, which doesn't seem unreasonable. BTW the container it comes in is of course legal for storing petrol of whatever sort.
It doesn't seem to work well in Coleman stoves, possibly not volatile enough to get them going quickly, flares up, but eventually does run well when the generator has heated up sufficiently. However it does very well in my Primus backpacking stoves. Panel wipe is horrible poisonous stuff, laced with all sorts of other things, I've tried it in stoves, it does work but I'd only ever use it outdoors, not standing over the stove. I'd rather just use pump petrol. You can tell it's not just a refined naptha like Coleman fuel just from the smell of it, my can mentions from memory toluenes and other things as well. Never mind near or under a tent awning. I'm happy to do that with Aspen.
I use the plain 4T version and mix it in the correct ratio for my 2T machinery. The 2T version is I think 50:1 ratio, which is not correct for my tools.