I wasn't going to weigh in until I saw what tractor vet wrote. Why do you need 95 octane fuel for an engine in the 7:1 compression ratio area? Thats wasting money. If you find an engine that runs better on premium than regular that it was designed for, there is a problem. Usually its carbon buildup causing increased compression or hot spots. Both cause pre ignition (pinging or spark knock). What are you going to do when 95 octane isn't enough? Using octane above whats recommended is only treating the symptom and not the cause. Premium does not "burn slower". Octane in simple terms is "flash point". An engine needs only enough octane to not set the fuel charge off by a hot component. A glowing bit of carbon is not as hot a spark, but it will set off a fuel with lower flash point. There's no substitute for routine maintenence. Have your fuel injectors and induction cleaned on a fuel injected vehicle every 30k. The best fix for that Oliver would be remove the head to remove the carbon build up and grind the valves. Fully inspect the intake for cracks/leaks. Verify you have the correct plugs.
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Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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