I'm not running IH low ash oil in my old tractors either, but, they are toys. On a hard working gas engine like a 656, the calcium, barium, magnesium additives(which happen to be the additives low ash oil has left out) in a regular diesel motor oil will definetly contribute to burned exhaust valves as it collects on the head and face of the valves and retards the transfer of heat of valve to the seat to the head to the coolant.
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Today's Featured Article - Oliver 550 Purchaser Checklist - by Greg Sheppard. Pound for pound the 550 is better than anything I've seen. It has great power for its size and can really hunker down and lug. Classified as a 3-bottom plow depending on soil conditions. I personally don't think it can be beat for a utility tractor in the 40 HP range. They are extremely thrifty on fuel, at least my DSL is. Most drive train parts are fairly easy to get. Sheet metal is probably the hardest thing to
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