You need to read up on runaway Detroit 6-71's. That truck engine had problems. The freight line I drove for had 4 GMC 9500 series tractors with 6-71 Detroit diesels all running on Rotella 15-40 oil and ran great until taken out of service with 2-3 million miles on them ( engines were rebuilt several time in their life). Seems funny that you have had low oil presure with Rotela 15-40. All my old farm tractors and trucks run on it with no oil presure drop And the company that I worked for used it in 30 tractors ,5 straight trucks, 3 wreckers, 3 fork lifts and other company vehicles all running on Rotela 15-40. The only time you would see drop when hot was when engine was getting tired and ready for overhaul.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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