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Posts: 3
Join Date: Jun 2009
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Oil capacity question -
11-20-2009
, 09:18 PM
Specs all say Xfires take 8.5 qts oil; but at 8 qts dipstick reads full. Query whether or not to add that extra .5 qt. --B4114
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Senior Member
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Posts: 3,336
Join Date: Jan 2008
Location: North Plains, OR
Age: 60
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Re: Oil capacity question -
11-20-2009
, 09:27 PM
When the dipstick says full, stop adding..... 
2005 SRT 6 SSB coupe FOR SALE
2005 SRT 6 Aero Blue coupe
"The Aero"

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Senior Member
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Posts: 3,092
Join Date: Apr 2006
Location: Caledon,Ontario
Age: 70
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Re: Oil capacity question -
11-20-2009
, 11:41 PM
Quote:
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Originally Posted by Bladerunner4114
Specs all say Xfires take 8.5 qts oil; but at 8 qts dipstick reads full. Query whether or not to add that extra .5 qt. --B4114
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If you were to take a brand new engine, add oil to the full level on the dip stick, then run the engine and recheck the oil level, I am sure that you would have to add oil to bring it back up to the full level again.
Not all of the oil would drain when the plug was removed as oil would be adhering to the inside of the engine, inside the oil ways, hydraulic lifters and in small puddles throughout the engine etc. I am sure that a pint of oil could easily be left inside the engine in this manner.
You may put in 8.5 qts at first but you would not put that in the next time.
How is it one careless match can start a brushfire, but it takes a whole box to start a campfire?
Cheers !
2004 Coupe 6 speed
Black/dark slate, Gray
Added Becker Navigation and
Becker Silverstone 2660 CD Player
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Senior Member / Moderator
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Posts: 10,109
Join Date: Jul 2007
Location: Aurora , ILL
Age: 48
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Re: Oil capacity question -
11-21-2009
, 02:06 AM
8 Quarts fills mine perfectly every time and I change my own oil.
Mobil1 0W40
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Senior Member
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Posts: 1,667
Join Date: Apr 2008
Location: Orlando, FL
Age: 57
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Re: Oil capacity question -
11-21-2009
, 07:22 PM
1 thing people are overlooking is that the oil filter is on top of the engine, meaning that when the car is off, it all drains down. So it may show as full with only 8 quarts with the filter being empty. 
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Senior Member
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Posts: 3,092
Join Date: Apr 2006
Location: Caledon,Ontario
Age: 70
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Re: Oil capacity question -
11-21-2009
, 11:02 PM
Quote:
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Originally Posted by Mimi05SRT6
1 thing people are overlooking is that the oil filter is on top of the engine, meaning that when the car is off, it all drains down. So it may show as full with only 8 quarts with the filter being empty. 
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As the oil is checked with the engine stationary all the time using the dipstick this really proves nothing. I stand by my statement in post #3 but specifically add oil trapped in the filter. The line from the oil pump I believe is fitted with a one-way valve, so oil past that point is trapped except oil that is subject to gravity which pulls it beyond the filter and joins the oil subject to the leak down. As air has to enter the lines to replace the oil, the leak down of oil could take a very long time and not be apparent at the dipstick until much much later.
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