Ah ha , assumption , the mother of all **** ups . Not being an expert , i cannot offer a valid argument . Other than to say , many bikes I have owned have been equipped with air / gas assisted suspension , some running at very high pressures. Whilst a few have stated only use nitrogen , all have recommended nitrogen to maintain stable pressure ! Sure one can buy a filtered pump or such like , but at what cost compared to penny's for a squirt of nitrogen . As for temperature ranges during normal use , touch any suspension reservoir after a spirited ride and it will be on the hot side of warm !