#2357330 - 08/22/11 07:53 AM
1997 CV Oil Consumption
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Over the Hill
Registered: 08/16/08
Posts: 3804
Loc: Brockton, MA
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I have noticed in my last 2 oil change cycles my car has been losing about a quart every thousand miles. I am confused about where the oil is going because I never see any smoke from the exhaust and I do not believe the car had any leaks. All info is in my sig, I am currently using Valvoline synpower 5w30 full synthetic and I run about 5ka between changes with a motorcraft filter. Any help as to what I should do is greatly appreciated.
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2003 Mercury Marauder 300A: 170k miles. Bolt ons, TR-3650, 4.56s. 
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#2357360 - 08/22/11 09:14 AM
Re: 1997 CV Oil Consumption
[Re: CrownVic97]
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Banned
Over the Hill
Registered: 05/14/07
Posts: 2724
Loc: MA
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I used Lucas on my Merc for 100Kk miles and it worked well.
I know tons of people hate the Lucas but it worked for me....???
YMMV
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#2357393 - 08/22/11 09:59 AM
Re: 1997 CV Oil Consumption
[Re: GSDNH]
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n00b
Registered: 03/13/09
Posts: 45
Loc: MS
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My 97 TC has the oil consumption issue as well. With 220k miles I'd expect oil use because of the mileage. I'd just like to know where it is going because I see no leaks and there is no blue smoke out the exhaust under any conditions.
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 1997 Towncar Executive
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#2357407 - 08/22/11 10:11 AM
Re: 1997 CV Oil Consumption
[Re: SouthernLincoln]
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Over the Hill
Registered: 05/10/10
Posts: 4420
Loc: Virginia
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My 97 TC has the oil consumption issue as well. With 220k miles I'd expect oil use because of the mileage. I'd just like to know where it is going because I see no leaks and there is no blue smoke out the exhaust under any conditions. Well the oil can't just disappear for no reason, if it isn't leaking then it's burning it... At 220K mi my guess would be the valve stem seals, or maybe just a defective PCV valve... Smoke isn't usually obvious until consumption is greater than a qt in 1000 mi...
_________________________
1998 Grand Marquis LS. 96K mi. .. Stock 2007 Grand Marquis GS. 90K mi. .. Stock 1996 F-150 XLT 196K mi Beater, Stock ---------- My Toys--------- (links are up)1969 Fairlane Cobra 428CJ 4-Speed 1972 Comet GT Restomod 306, C4 1988 Turbo Coupe 331 AOD & 3.73 .. Pressurized ½ Motor is History *****************NEW TOY!!!*********************1969 Base Fairlane 302, C4, 45K mi(really!) Now with P/S & PDB Gonna wake it up with a Blue Print headed 347
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#2357426 - 08/22/11 10:49 AM
Re: 1997 CV Oil Consumption
[Re: SouthernLincoln]
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Over the Hill
Registered: 08/16/08
Posts: 3804
Loc: Brockton, MA
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My 97 TC has the oil consumption issue as well. With 220k miles I'd expect oil use because of the mileage. I'd just like to know where it is going because I see no leaks and there is no blue smoke out the exhaust under any conditions.
That's what im saying! Im not surprised its burning, its high miles with mods, I just want to know where its going...Im thinking it may be time to pick up a mark viii engine and start getting ready...
_________________________
2003 Mercury Marauder 300A: 170k miles. Bolt ons, TR-3650, 4.56s.
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#2357446 - 08/22/11 11:43 AM
Re: 1997 CV Oil Consumption
[Re: CrownVic97]
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Over the Hill
Registered: 04/06/02
Posts: 1569
Loc: Vancouver
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It can be really tough to see that puff of blue, especially from the driers seat because it dissipates quickly. Given the reliability of these engines, especially in the 97-99 years, if the PCV is in good shape, and there is no oil seeping underneath, its probably valve stem seals.
If you're mechanically inclined, it's well worth doing this job yourself. Use the BOK on this site and search the forums as there is lots of good advice available. The first piece of advice, use new valve cover gaskets and grommets. A few didn't and have leaking valve covers.
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#2357510 - 08/22/11 01:47 PM
Re: 1997 CV Oil Consumption
[Re: White Falcon LS]
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Over the Hill
Registered: 08/16/08
Posts: 3804
Loc: Brockton, MA
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I will check the PCV valve but if its the valve seals it's not worth the time, I am planning a engine swap in the near future.
_________________________
2003 Mercury Marauder 300A: 170k miles. Bolt ons, TR-3650, 4.56s.
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#2357526 - 08/22/11 02:36 PM
Re: 1997 CV Oil Consumption
[Re: CrownVic97]
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Climber
Registered: 08/16/02
Posts: 851
Loc: Chattanooga, TN
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FWIW - Had a nice '95 MGM that puffed a bit of blue smoke after looong red lights (guide seals). Went to Penzoil Hi-mileage oil. Cured the smoking and used a quart about 2500 miles. Changed oil and filter @4000. Put 145K on it this way successfully. Sold it 2 years back to a friend - kept track of it. It is still doing the same - no smoke.
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Gaither
'04 GM GS
'02 CV LX HPP
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#2357550 - 08/22/11 03:39 PM
Re: 1997 CV Oil Consumption
[Re: Gaither]
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Over the Hill
Registered: 08/23/09
Posts: 1799
Loc: Omaha, NE USA
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Want to know where the oil is going, check your spark plugs.
_________________________
2005 Crown Vic LX: Eaton 1.5" P71 drop springs & KYB Gas-A-Just P71 shocks. Heinous Control arms. Addco sway bars. 18x8.5 Fanblades. Mini D2S Projector retrofit - 50W w/ 5000k. Mach 1 Chin Spoiler, Kenwood head unit, upgraded speakers, Infinity Bass-link. Cryostop Rotors, and Porterfield R4S Pads. Trickflow Upper plenum, AFe Stage 2 intake, Steeda UD Pulleys, Catco high flow cats, Factory Duals w/magnaflow 11224's, MMC Driveshaft w/ Fabtech spacer, BOC Tune. 1988 Isuzu Impulse Turbo: Torn to bits, being built and collecting dust. (2.6L engine, 7670 EFR, MUA-5 trans etc. etc.) 
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#2357553 - 08/22/11 03:46 PM
Re: 1997 CV Oil Consumption
[Re: ImpulseRocket89]
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Over the Hill
Registered: 08/16/08
Posts: 3804
Loc: Brockton, MA
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Want to know where the oil is going, check your spark plugs. Think so? I just changed them about 5k ago because I am running one step cooler with the tune. What would the culprit be if this were the case?
_________________________
2003 Mercury Marauder 300A: 170k miles. Bolt ons, TR-3650, 4.56s.
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#2357561 - 08/22/11 04:07 PM
Re: 1997 CV Oil Consumption
[Re: CrownVic97]
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Over the Hill
Registered: 08/23/09
Posts: 1799
Loc: Omaha, NE USA
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Most of the possibilities were already listed. With the plugs being fairly new it actually works out even better. Engines can burn oil slowly over time with no sign of smoke or other problems. The only evidence you have is buildup on plugs, valves, and the exhaust.
The Isuzu 3.5 V6 from 98-2000 had a severe oil consumption problem due to a factory design flaw with the pistons. The oil was not draining back fast enough from the rings and being forced through to the combustion chamber and burned. Most owners never reported smoke or other issues aside from plugs fouling sooner and excessive carbon buildup over time.
_________________________
2005 Crown Vic LX: Eaton 1.5" P71 drop springs & KYB Gas-A-Just P71 shocks. Heinous Control arms. Addco sway bars. 18x8.5 Fanblades. Mini D2S Projector retrofit - 50W w/ 5000k. Mach 1 Chin Spoiler, Kenwood head unit, upgraded speakers, Infinity Bass-link. Cryostop Rotors, and Porterfield R4S Pads. Trickflow Upper plenum, AFe Stage 2 intake, Steeda UD Pulleys, Catco high flow cats, Factory Duals w/magnaflow 11224's, MMC Driveshaft w/ Fabtech spacer, BOC Tune. 1988 Isuzu Impulse Turbo: Torn to bits, being built and collecting dust. (2.6L engine, 7670 EFR, MUA-5 trans etc. etc.)
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#2357709 - 08/22/11 08:40 PM
Re: 1997 CV Oil Consumption
[Re: ImpulseRocket89]
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Over the Hill
Registered: 08/16/08
Posts: 3804
Loc: Brockton, MA
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Most of the possibilities were already listed. With the plugs being fairly new it actually works out even better. Engines can burn oil slowly over time with no sign of smoke or other problems. The only evidence you have is buildup on plugs, valves, and the exhaust.
The Isuzu 3.5 V6 from 98-2000 had a severe oil consumption problem due to a factory design flaw with the pistons. The oil was not draining back fast enough from the rings and being forced through to the combustion chamber and burned. Most owners never reported smoke or other issues aside from plugs fouling sooner and excessive carbon buildup over time.
I will take a look at one of the plugs, thanks!
_________________________
2003 Mercury Marauder 300A: 170k miles. Bolt ons, TR-3650, 4.56s.
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#2357779 - 08/22/11 10:21 PM
Re: 1997 CV Oil Consumption
[Re: CrownVic97]
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Over the Hill
Registered: 04/06/02
Posts: 1569
Loc: Vancouver
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When my valve stem seals went, I don't believe I saw any evidence on the plugs. Without doing a leakdown test, the only evidence I could see of valve stem seals was an occasional puff of blue smoke. If you don't even see the blue smoke, don't be surprised if you don't see any evidence on your plugs.
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#2357781 - 08/22/11 10:23 PM
Re: 1997 CV Oil Consumption
[Re: enslow]
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Over the Hill
Registered: 08/23/09
Posts: 1799
Loc: Omaha, NE USA
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^ This is true. I was just offering a suggestions. Spark plugs are always a great place to check to see how your engine is doing. 1qt/1000mi is generally with in acceptable consumption limits for most OE manufacturers anyway.
_________________________
2005 Crown Vic LX: Eaton 1.5" P71 drop springs & KYB Gas-A-Just P71 shocks. Heinous Control arms. Addco sway bars. 18x8.5 Fanblades. Mini D2S Projector retrofit - 50W w/ 5000k. Mach 1 Chin Spoiler, Kenwood head unit, upgraded speakers, Infinity Bass-link. Cryostop Rotors, and Porterfield R4S Pads. Trickflow Upper plenum, AFe Stage 2 intake, Steeda UD Pulleys, Catco high flow cats, Factory Duals w/magnaflow 11224's, MMC Driveshaft w/ Fabtech spacer, BOC Tune. 1988 Isuzu Impulse Turbo: Torn to bits, being built and collecting dust. (2.6L engine, 7670 EFR, MUA-5 trans etc. etc.)
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