mkirsch said: (quoted from post at 15:27:38 05/14/14) Just my opinion here, but doctoring up your gas really only serves to separate cash from your wallet.
What exactly are you expecting that tiny bit of oil in the gas to lube on an overhead valve 4-stroke engine?
On a 2-stroke engine it makes sense because the fuel has to go through the crankcase and past the bearings to get to the cylinder.
On an overhead valve 4-stroke, the only place this tiny bit of lube will touch is the protruding section of valve stem on the intake. A fraction of an inch. How much good do you really think that is doing?
The oil burns during combustion, so nothing gets to the exhaust valves.
If you think it's doing something for you, by all means continue, but like someone else said earlier, there is no science to back it up.
It was me who said that there is no science behind it yet I am the one also recommending to do it.
As for the benefit: You already answered your own question. The intake valves seem to be the ones more prone to sticking on this new gas on tractors that sit around and rarely get worked much or worked hard. Hopefully, the OP will respond back and confirm it was intake valves that stuck open. A little oil on the intake stem is exactly what I hope to accomplish with my mixture. Plus for whatever reason my ole JD model A seems to run a bit better with some Kerosene mixed in the gas.
As for the cost: Whoopey do on the 10 gallon or so a year that I might put through one of my ole clunkers tractors that does more sitting around than running. Guess I wasted $2 bucks or so a year if I had some type of cheap oil to my gas. Frankly, If I add diesel or Kersoene to the gas then the cost of whatever I add is close enough in price as the equivalent amount of gas - so basically no added cost at all if using diesel or Kero.
If you remember using gas from a few decades ago for use as a poor man's greasey parts cleaner and compare it to trying to do the same with modern gas. Well the modern gas really dries out your hands real quick like where the older stuff was more oiley and much more like a solvent.
Again, I admittingly have no science behind what I am doing, but in my case real cheap peace of mind that is not costing me anything substantial to do.
This post was edited by rankrank1 at 16:23:56 05/14/14.
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