Oil and Filter change 6.5 qts.?? - Pontiac GTO Forum
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post #1 of 23 (permalink) Old 11-24-2005, 07:18 PM Thread Starter
 
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Oil and Filter change 6.5 qts.??

When I did the first oil + filter change I put in 6.5qts. This indicated over the full mark on the dipstick. I am guessing about 1/2 Qt. Is this a known problem, or unique to my car only? I am wondering if the book is right or if my dipstick calibration is wrong. The AC oil filter PF44 , referenced in the owners manual, is not available it's substitute is PF46 ....could this be the problem, the PF46 is a small filter.

2005 GTO, M6, Quicksilver / Black
2003 GTP, Silver / Black, 3.4" Pulley
1994 Z-28, Red, M6, Hotcam, SLPs, Tune
1994 Z-28, Red, M6, stock
1994 Cadillac STS
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post #2 of 23 (permalink) Old 11-24-2005, 08:53 PM
 
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Let me go and recheck my manual but I believe mine said 6.0 quarts. Mine is asn '04 though.
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post #3 of 23 (permalink) Old 11-24-2005, 08:55 PM
Rob in CT
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Engine oil (qt / L): 5.3 / 6.0 Mobil 1 5w/30
 
post #4 of 23 (permalink) Old 11-24-2005, 09:08 PM Thread Starter
 
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I just double checked my 2005 owners manual and pg.5-90 capacity chart shows 6.5qts / 6.2L. Does anyone have a 2005 owners manual that has a different oil+filter drain and refill amount?

2005 GTO, M6, Quicksilver / Black
2003 GTP, Silver / Black, 3.4" Pulley
1994 Z-28, Red, M6, Hotcam, SLPs, Tune
1994 Z-28, Red, M6, stock
1994 Cadillac STS
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post #5 of 23 (permalink) Old 11-24-2005, 10:36 PM
 
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Did you check after running the engine? I know the LS1 is 6.5 qt, no reason to believe the LS2 would be less than that.

2004 QuickSilver GTO
M6
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post #6 of 23 (permalink) Old 11-25-2005, 12:00 AM
 
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I put 6.0 quarts in my LS1 and checked dipstick and it is in the correct range. HMMm.
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post #7 of 23 (permalink) Old 11-25-2005, 08:08 AM
 
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On the GTO the LS2 is more oil than the LS1. I think it was 6.5 for the LS2 versus 6.0 for the LS1. Here is the weird stuff for you. The LS1 Corvette had a winged oil pan. It took 6.5 qts. The LS1 GTO takes 6.0 qts. In the LS2 the corvette gets a new baffled oil pan to allow higher cornering limits without starving the oil pump. The Corvette is now 5.5 and the GTO goes to 6.5.

I think what you need to do is start the engine after the oil change and let it idle for a minute or so. Then to get an accurate reading let it sit for 10-15 minutes before checking the level.

Some things to check for are did you get all the oil out of the car. If you are using ramps the car will not be level and will not drain correctly. you may be leaving as much as 3/4 of a qt in by doing that. The smaller filter also takes away about a 1/3 of a qt. IMO you should only use a premium filter. AC/Delco, Mobil 1, or Amsoil are rated as the best, and they will not reduce your oil capacity or your filtering ability.
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post #8 of 23 (permalink) Old 11-25-2005, 08:10 AM
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excellent info!
post #9 of 23 (permalink) Old 11-25-2005, 09:21 AM Thread Starter
 
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Quote:
Originally Posted by fergyflyer
On the GTO the LS2 is more oil than the LS1. I think it was 6.5 for the LS2 versus 6.0 for the LS1. Here is the weird stuff for you. The LS1 Corvette had a winged oil pan. It took 6.5 qts. The LS1 GTO takes 6.0 qts. In the LS2 the corvette gets a new baffled oil pan to allow higher cornering limits without starving the oil pump. The Corvette is now 5.5 and the GTO goes to 6.5.

I think what you need to do is start the engine after the oil change and let it idle for a minute or so. Then to get an accurate reading let it sit for 10-15 minutes before checking the level.

Some things to check for are did you get all the oil out of the car. If you are using ramps the car will not be level and will not drain correctly. you may be leaving as much as 3/4 of a qt in by doing that. The smaller filter also takes away about a 1/3 of a qt. IMO you should only use a premium filter. AC/Delco, Mobil 1, or Amsoil are rated as the best, and they will not reduce your oil capacity or your filtering ability.
Thanks for the information....I did have the car on ramps, good point! I am changing the oil again soon. I only use Mobil1 and AC filters. I checked the oil many times after the first change and it was consistantly over full until it used enough to get to the full mark. I assume your car ends up at the full mark when you cahnge oil and filter with 6.5qts? What AC filter part number do you use?

2005 GTO, M6, Quicksilver / Black
2003 GTP, Silver / Black, 3.4" Pulley
1994 Z-28, Red, M6, Hotcam, SLPs, Tune
1994 Z-28, Red, M6, stock
1994 Cadillac STS
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post #10 of 23 (permalink) Old 11-25-2005, 10:35 AM
 
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I also used ramps and just put 6 quarts in and I m just a hair under the full line
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