Posted by karl f on October 29, 2007 at 19:35:51 from (172.162.143.154):
In Reply to: what octane gas to run? posted by new 560 owner in ks on October 29, 2007 at 10:04:19:
the manual will likely say "93 octane research method." If you look at today's pumps, they will say "?? octane rating (r+m/2)." There are 2 methods of determining the octane rating, and both seperately will come up with a different number. today's octane rating is an average of the two. skipping the science, today's 91 octane, measured r+m/2 will likely be equivalent or barely higher than 93 octane observed with only the research method. there is a lot of info on octane on the internet. on our farm, my dad cannot justify high test so, i just let it go. changed the plugs on the 656 gasser 18 mo.s after an overhaul, and all kinds of carbon in the combustion chambers!
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Today's Featured Article - History of the Nuffield Tractor: Conclusion - by Anthony West. In the last piece I mentioned that Nuffield had reached the stage where they had chosen to drop the "Universal" from production. The two new models were given three figure numbers, instead of "three" and "four". Model numbers were introduced to help farmers and dealers instantly recognize the engine size and horsepower of the tractor, the 4/60 had a four cylinder diesel engine which developed 60 bhp at 2,000 rpm. The 3/42 had a 3 cylinder diesel engine which produced 42 bhp at 2,000 rpm. Th
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