I have an old Case that needs 65 octane gas and the Cletrac AG6 needs 75 octane. I mixed about a gallon diesel to 5 gallons gas because the guy I bought the Cletrac from said the valves had been stuck. I noticed it smoked a little until I pulled hard and the smoke quit and it ran fine. Gas is poor here in Colorado with a lot of alcohol. It took 15 gallons of gas to go 3 miles with the Cletrac. Does anyone have a fuel mix for better economy?
Normally engines run better on a higher octane fuel and since today's regular is 87 octane I dont see why you would have a problem. You might add some upper cylinder lubricant or lead substitute for a couple of tanks if you have sticky valves.
Walter
Though the fuel is 87 octane, you may have trouble on very hot days due to the fuel's vapor pressure. It seems like the gasoline today is designed for cars with positive-pressure fuel systems where vapor lock is not encountered. When used in a system with a vacuum fuel pump, or even a gravity fuel system, sometimes the fuel will boil in the fuel line or carburetor, causing vapor locking. I have found by going up one grade in gasoline the vapor locking is reduced.
As far as mixing fuel oil into the gasoline for valve sticking - I have not heard of that. I have heard of adding some ATF to the gasoline to help that and to reduce carbon, but I have never seen it proven.
Blake
I rewad this last night and I though I miss read it. What were you pulling to make it take that much fuel and how fast were you traveling.?
I started the Cletrac after it has set for 25 years. The timing was off and the choke stuck are part of the reasons that I used 15 gallons of fuel. The part of the manual that got me thinking is the section on the cheap fuel parts. Old John Deer tractors could use half gas half diesel fuel and ran quite well. The EPA fuel has a lot of alcohol to reduice combustion temperatures and polution. Diesel fuel gives more milage and power per gallon because it has more BTUs per gallon. Mixing diesel and gas would increase the BTUs per gallon and I can get off road diesel and not have to pay the road tax to operate a little cheaper. I want to see if acetone will help also.
Quote from: "G Huffman"Diesel fuel gives more milage and power per gallon because it has more BTUs per gallon. Mixing diesel and gas would increase the BTUs per gallon and I can get off road diesel and not have to pay the road tax to operate a little cheaper. I want to see if acetone will help also.
I know that fuel oil has more BTU than gasoline, but will not give you less fuel consumption in a spark-ignition engine. Tractors that were made to run on kerosene had lower compression to prevent preignition, as kerosene has less than zero octane. Some used water injection with much success.
Kerosene and fuel oil were burned very successfully in the Rumely Oil Pull tractors. These tractors have a two cylinder horizontal engine that is oil cooled and runs at a very high temperature, which allows low grade fuels to burn well. They also burn about the same amount of water as they do fuel in their water injection system. No doubt this water, when it flashes to steam, contributes to the power of the engine.
I have not heard of much problem burning gasoline with ethanol in most four cycle engines, but it is a big no no in two cycle engines that have oil mixed in their gasoline.
Blake