Yes, cold oil will make higher pressure. Much higher... but it simply gets dumped across the relief valve in the pump body. The net result is that the rest of the engine is starving for oil. The pressure sensor being somewhat higher up than the relief valve will see a lower pressure, and it is right, as are the rapping lifters. You did the right thing by dropping the oil. I guess if it's desparate cold then mabey 5W20 is in order, but I probably would have went with 5W30 minus the Lucas. While I suppose it's good as a viscosity improver in an old worn engine, if yours is still in good shape and tight, all it's doing is starving the engine for oil because cold thick oil can't flow.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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