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Original Message
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Engine Wear and Oil Temperature |
By John - 10/24/2002 11:20:29 AM; IP 142.177.93.22 |
Allan....the sludge is formed from engine wear (metal), and carbon. It is because the oil was hardly ever changed. All motor oil sold today appears to meet well above the min SAE standard. The only oil I know to have less detergent is 2 cycle outboard motor oil (that 50:1 purple stuff)...not useful for your car engine! (but great in chainsaws, whipper-snippers, lawn-mowers, etc.)
Davy, I agree the engine should run for a little while before driving off....just to let the oil fully circulate (about 30 seconds). But most engine wear occurs in a cold engine, during and immediately after, start-up. The best thing to warm up an engine quickly is to impose a load on it...and that means getting the car under way. Obviously, until the oil warms up, one shouldn't "push" things. No "tramping" it until between 5 and 10 miles are driven to allow the oil to come up to temperature. |
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