I was a Klotz dealer. I will give you a little insight on why I quit using Klotz in 2009. Klotz may work for many out there, just not for me. The two 550 fans I built for the grand kids runs mixed gas with no oiler. They ran a 40:1 ratio of Amsoil dominator (I was an Amsoil dealer also). We ran Amsoil for half the year. I didn't get a timely shipment of Amsoil so we switched to Klotz. We lost 200 RPM by the second tank of fuel. I couldn't figure this out. We ran another weekend, same thing 200 RPM low. Both 550 sleds mind you. During the week I tore one of them down. The film in the motor was like glue, for a lack of another word. I cleaned it up and put it back together. Went back to Dominator, the following weekend and that sled was back to running RPM. The other sled took 2 tanks to get cleaned out and it was back. So the question was, was it the oil or because we ran it in a fan cooled sled? We then tested the Klotz in my son-in-laws 2007 600HO. It started to get sluggish and was getting worse. The guillotine bellows EV port would get plugged constantly. We tore the engine down and found the same residue as the fanners. Cleaned the residue and put it back together and we were off to the races again. The film reminded me of film the product Energy Release left behind. If anyone remembers that product.