Ok dont want to sound like a din here but....ive got an LPG system on my v8, but it takes 4 ever to fill it up, its got 2 tanks 1 under each side step, when i fill it up, it seems to take a lifetime, then i discover its not full up, ive got the green ligh thingy in the dash, these show full as in 4 green lights, im not convinced its full tho, it seems to go down rather quick..it starts off quite fast filling then gets slower and slower and slower, any ideas cheers Andy