Aluminium is a better conductor of heat than stainless - it's the reason carpet will "feel" warmer than a tiled floor when at the same temperature. A tank made from ally will heat/cool much faster. It's why your hot water tanks are made from copper which conducts heat even better than ally. It's so little energy is wasted heating up the pipes/tank in a system DESIGNED to heat the fluid within it. The stock tank is a better insulator than a stainless or ally one would be. The stock tank is a superb material and was designed that way for crash-worthiness. Martin #1458 Farrar Hudkins wrote: > /lurk mode cancel > > Hi Walt, > > A stainless fuel tank sounds wonderful. Have you considered aluminum? I > have no experience in metallurgy (hint: somebody who does please help me > here) but aluminum always feels cooler to the touch than stainless, > according to my hands anyway. It also might be less expensive! However, > if aluminum is too weak, my question becomes moot. > > Okay, two posts in one day is more than enough for me. > > /lurk mode engage > > - Farrar