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Old 08-05-2010, 08:40 AM
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oil level ?

I've noticed that when checking my oil when the engine is still hot,[within 15 minutes of shutting it off] that the level is higher than if I wait overnight. I would have thought the opposite to be true,[more drain back], but I've checked this repeatedly w/ the same result. Does oil expand? , like 1/4 of a quart? thanks dave

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Old 08-05-2010, 08:45 AM
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Expansion?
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Old 08-05-2010, 08:46 AM
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Quote:
Originally Posted by 2old2fast
I've noticed that when checking my oil when the engine is still hot,[within 15 minutes of shutting it off] that the level is higher than if I wait overnight. I would have thought the opposite to be true,[more drain back], but I've checked this repeatedly w/ the same result. Does oil expand? , like 1/4 of a quart? thanks dave
Yes , Dave , oil does expand , like any petroleum product . That's why it is best to buy gas in the morning when the tanks are the coolest . You're getting the most for your money . Years ago I filled up a 20 gallon barrel of gas in Wyoming and by the time I got to New Mexico the barrel overflowed a bunch of gas into my truck bed . I learned to only put in 18 gals if I didn't want a mess .
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Old 08-05-2010, 08:49 AM
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Originally Posted by Greg T
Expansion?
Hello Greg , from a natural born yooper . I was born and raised in Herman (outside of L"Anse) Left in '85 and do NOT miss the winters . I do miss the state fair in Esky .
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Old 08-05-2010, 09:03 AM
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Could it merely be that hot oil climbs the dipstick a bit more easily than cold oil?

Or that oil splashed up around the dipstick tube adds to the reading by getting on the dipstick when you insert and remove it?
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Old 08-05-2010, 09:49 AM
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Quote:
Originally Posted by 2old2fast
I've noticed that when checking my oil when the engine is still hot,[within 15 minutes of shutting it off] that the level is higher than if I wait overnight. I would have thought the opposite to be true,[more drain back], but I've checked this repeatedly w/ the same result. Does oil expand? , like 1/4 of a quart? thanks dave
To confirm . Check the oil on your other cars to compare , Or your neghbors cars . I think you'll find this is consistent . I worked heavy equipment for over 20 years ,which obviously uses much more oil, and all the components (engine , trans , hydraulic) have hot and cold markings (as much as 3" difference) for this reason . Example : a CAT dozer hydraulic tank filled to the hot mark when cold will blow hyd oil all over the deck when it warms up. This happens quite often when we hired a new lube man at the mine .
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Old 08-05-2010, 10:31 AM
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Quote:
Originally Posted by adantessr
Hello Greg , from a natural born yooper . I was born and raised in Herman (outside of L"Anse) Left in '85 and do NOT miss the winters . I do miss the state fair in Esky .

Howdy! I know what ya mean about the winters. But I'm too old to get out
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Old 08-05-2010, 11:08 AM
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thanx for answer, i'll check my pickup. i had never noticed this phenom before, but then again, i've never been this anal 'bout checking oil dave
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