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Harmful to only drive 3 days a week? 900

posted by  spook on  Fri Oct 22 04:25 CST 2004
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last visit: Fri Oct 24 08:06 CST 2014
[RELATED]

Dear Peter,

Good p.m. My guess is that an oil film clings to cylinder walls, rings, bearings, etc. Oil is pretty viscous, so even if free liquid has drained back into the pan, oil will cling to working surfaces. Over a three-day period, even if a high-temperature climate, this film is likely to be plastic. Over several months, especially in a high-temperature climate, this film likely will dry.

If inadequate lubrication at start-up - after a period of idleness - were a major issue, I'm sure cars would have electric oil pumps. Such a pump would pre-pressure the system, just as does the fuel pump (for 1-2 seconds, after the ignition key is moved to the "start" position).

As the starter motor turns the engine a for few seconds before ignition, the oil pump should restore at least some of the oil pressure.

I'd be interested to know, from those, who have an oil pressure gauge, how quickly the gauge shows positive oil pressure, once the ignition has been put into the "start" position.

Hope this sets your mind at ease.

Yours faithfully,

spook






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