I was originally using the Stanadyne additive but shifted to the Powerservice brand in the silver bottle. Lately I've been using some from a commercial vendor(can't remember the name of the maker) after being given a nearly full 55 gallon drum of it by the folks my Dad was working for. They said they had to get rid of it because they couldn't get an MSDS sheet for it. It took me about two minutes to call the place listed on the drum and find out everything I needed to know about the stuff. In this case it was a somewhat proprietary mix they had made up for a bulk distributor.
So far I haven't noticed any real difference in any of the brands, and have been maintaining within about 1/2 MPG with all of them. With the stuff I'm using now, out of the drum, they make claims of a slightly higher percentage of gain than I am seeing, but there always seem to be better results gained under controlled conditions than typically seen in the field so it doesn't bother me a bit. Not to mention it's nearly $1000 worth of free additive so who am I to complain...LOL
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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