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 - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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