i know you really should not clean an air filter with gas becaue on how flamible it is but someone gave a me a spare twin-air filter that has only been used one time. the person used maxima filter oil on it but i use no-toil, i tried using various cleaners and degreasers on it to get the old filter oil out but it still felt gummy so i used gas and it actually worked. i remember reading on another board that gas can cause the pores in a foam air filter to expand by 20%, do you guys agree with this, the filter looks fine but im not sure if i should take the chance and use it or not, i dont want to allow dust to get into my engine and ruin my valves. what do you guys think?