peterr, remember that Fuel Power goes only in the fuel. Lube Control goes in the oil only. Neutra can go into fuel or the oil. Auto-RX is only for the oil, although it can also be used in transmissions, etc. Don't put Auto-RX in the gas.
I personally believe in Auto-RX. I had a seal leak and I tried both Valvoline MaxLife motor oil (which is supposed to have a seal conditioner) and a stop leak product to try to stop the seal leak. Neither worked. The Valvoline MaxLife did seem to really run great in my car, however.
I tried Auto-RX and after the Auto-RX cleaning the seal leak stopped. I can't prove it was the Auto-RX that stopped the leak and I am not a lubrication chemist or engineer. But I can state that the seal leak stopped and did not come back. That is the simple truth. It made me a believer in Auto-RX. Plus Auto-RX is considered a safe and natural product, although I certainly would not drink it.
If you consider Auto-RX too expensive you can try Neutra. It can be used in the oil and the gas-follow the directions on the container. The guy who used to own this web site (Bob) really believed in it. What I was hearing was that it worked kind of like Auto-RX but would not necessarily stop a seal leak. The smell was not too bad for me. I find Fuel Power and Lube Control to be very strong.
I once put a full 12 oz. of Neutra in my fuel tank and it seemed to improve my fuel mileage. The car ran really good also. I didn't seem to get the same effect used smaller amounts.
Based on the results I achieved with Auto-RX I figure it is worthwhile to do a cleaning once a year and use maintenance doses of 3 oz. each oil change. If you wanted to use Neutra instead you could maybe do a yearly cleaning with it-but I don't believe it is intended for continual use as maintenance doses.
There was a mechanic at this web site who swore that Auto-RX worked fantastic in sludged up engines. I think he was kind of a Toyota specialist. And I have heard that Auto-RX is used by some used car dealers.
