2005 pontiac GTO - Oil change light came on. I change the oil and filter, it took almost seven Quarts. Drain it by jacking up the left side, right side and back of car. I then tried to reset the the change oil light by turning on the key, pressing the gas pedal to the floor slowly twice in five seconds many many times. Change oil light still on. Hmmm? Then tried to reset the computer by disconnecting the battery and pressing the break pedal for thirty seconds. Change oil light still on. Then disconnected the battery for five minutes, change oil light still on. Hmmm? My car has 7,883 miles on it and looks and smells like brand new, in&out and under. The car is spotless. Could this be the sensor and where do I find it. Your help is welcome. Thanks Mark

For the 3.8L, the oil filter is right underneath the engine near the front bumper. Really easy to get to. So, this a general procedure which applies to most oil changes as well:
What you need: new oil filter, 6 quarts of 5w20 oil (the vehicle calls for 5, but, it's always helpful to have a bit extra just in case), socket wrench and socket set, a car lift or a jack, jack stands, and wheel chocks, one can of brake clearner, a shop towel, a little bit of time, and a little arm muscle.
***It is best to let the vehicle cool before doing this. Hot oil hurts!!!
1) Open the hood, take the oil cap off and put somewhere where you won't lost it!2) Either put the car on a lift if you have access to one or dot he following: have the vehicle on a level surface, place chocks or something similar behind the rear wheels to prevent the vehicle from rolling backward, jack the car up, place jack stands under secure spots under the vehicle, slowly let the jack down letting the vehicle rest on the jack stands (if you are unsure on where to place jack stands, best to spend a few bucks to have a shop do the oil change).3) Have a large pan or container ready for the oil to drain into.4) Use a socket wrench (I cannot recall the size needed for the Pacificas) to take the drain plug off of the oil pan. Slowly take the drain plug out so you can also make sure the pan is going to catch the oil.5) Let the oil drain for about 5 to 10 minutes and put the drain plug back in. It doesn't need to be Superman tight!!! It needs to be snug. 6) Spray some brake cleaner on the oil pan where there is oil and wipe off with the shop towel. Be very careful not to get brake cleaner in your eyes. It burns. 'Nuff said.7) Now, the oil filter is not at an angle. It's on the engine straight. What this means is when you take it off, it will go down the sides of the filter and down your hand and arm. However, still has to come off. Reposition the oil pan under where the oil filter is. Lefty loosey, righty tighty. 8) Use the brake cleaner to clean the area where the oil filter went. Wipe off with towel. After wiping, some oil will continue to drip. 9) Take some oil and put some in the oil filter, tilt the filter and let it soak up all or most of what you poured in. Also, with your finger, run some oil around the gasket on the oil filter. 10) Put the oil filter back on the vehicle. Remember, this also does not have to be Superman tight, just very snug. The tighter you put it on, it will be that much harder to take it off next time.11) Now, with the oil pan drain plug and oil filter back in place, put the jack underneath the car, jack it up and remove the jack stands, and lower the vehicle down OR lower the car if it is on a lift. 12) Pour in the rest of the quart of oil from the open bottle that you used to pour a little bit of oil in to the filter with and pour in 4 more quarts of oil after that. 13) Pull the dipstick and wipe clean. Put the dipstick back in and pull back out to check the oil level. If a little more oil is needed you should have that extra quart. If needed, put a little more in and recheck.14) Replace oil cap after oil level is correct. 15) Turn on the car and let it idle for about 5 minutes. 16) Recheck the oil level (which there should be no issue with it).
Done!

well let me see you have 4.6L engine you need 7.5 quarts of oil with new oil filter.to do the oil change you need large drain pan and oil filter wrench and a metric wrench to remove oil drain plug you need a funnel also.you need first start engine let it run for 5 minutes to warm up thin out the oil so it will flow better.once engine warm up.turn off the engine.open you hood.now safely raise support vechicle on jack stands make sure vechicle parked on solid level ground.place large drain pan under oil pan remove oil drain plug you need a 15m wrench remove drain plug let all old oil drain out until you see slow drip then reinstall oil drain plug dont over tighten drain bolt.then place drain pan under the oil filter then remove oil filter using oil filter wrench or large channel lock pliers.once you remove oil filter wipe oil filter seal surface with clean paper towel.take new oil filter add oil to new filter then install new oil filter hand tight take filter wrench turn oil filter one half more turn dont over tighten will damage oil filter seal.make sure oil pan drain plug is in place. then lower vechicle. remove oil filler cap on the valve cover add new oil to the engine using a funnel to keep from spilling oil all over the valve cover and exhaust manifold.add all 7.5 quarts to oil crank case wait until oil settle down in crank case check oil dip stick oil level should be at the full mark on oil dip stick.dont over fill crank case.once you finished oil level correct crank engine check for oil leaks at oil filter and oil drain plug. if engine running okay you see no oil warning lights you ready wheel and deal.

first you will check your owners manual for the required specification of what weight ( 10w30) oil to use and then the fill capacity.( 5.quarts ) also the auto parts store will tell you those as well. I always buy one extra quart. Once you have oil and filter, warm car up for 3-5 minutes, (this will help oil drain faster and easier) once car is warm shut of motor,block rear wheels jack the front of car up enough to slide under it. BLOCK car or support with jack stands.put a drain pan under car, remove the oil drain plug on the bottom or side of the oil pan.( make sure your catch pan will hold at least 6-7 quarts of fluid. once oil has stopped draining replace drain plug, now remove the oil filter, unscrew counterclockwise, lube new oil filter seal with oil, screw on to oil housing clockwise rotation, hand tighten. fill motor with oil to recommended fill capacity.start car , check for leaks around filter, if no leaks shut car off and lower car to ground, check oil on dipstick and wipe off,insert and check again,fill to fill line on dipstik and your done.

Jack up your Porsche using a floor jack and place the car securely on jack stands at all four corners using the factory jacking points.

2 Place an oil container under the oil drain plug of the motor.

3 Using an 8-mm allen socket, remove the drain plug at the bottom of the oil pan.

4 Let the oil drain thoroughly--this will take about 20 to 25 minutes.

5 Once all the oil is drained from the engine, install a new drain plug along with a new aluminum sealing washer. Tighten the drain plug to 37 lbs .

The oil filter cartridge is located in front of the oil pan on the right side. With an oil filter removal wrench, unscrew and remove the cartridge. Be careful of spilling oil.

Install a new oil filter cartridge and O-ring. Before installation, run a bead of oil around the O-ring to lubricate it. Torque the oil filter cartridge to 19 lbs.

Pour new oil into the oil filler neck located in the engine bay. 1998 to 2001 911s (996) take 8.5 quarts, and 2004 and up take 8.25 quarts. Newer 911s (997) take 9 quarts. When filling the engine with oil, pour in 8 quarts and then use the dipstick to get the amount of oil exact.

Lower the car off the jackstands.

BEST TO LET DEALERSHIP CHANGE ENGINE OIL.YOU NEED A DEALERSHIP OIL FILTER.YOUR OIL FILTER INSIDE A HOUSING ON FRONT SIDE OF THE ENGINE. CHANGING YOUR OWN OIL NOT HARD.YOU NEED 9 QUARTS OF OIL LOOK INSIDE GLOVECOMPARTMENT FOR OWNERS MANUAL TO SEE WHAT TYPE OF ENGINE OIL YOU NEED TO USE AND HOW MANY QUARTS.IF YOU DONT CHECK READ MANUAL TO SEE WHAT OIL TYPE AND QUARTS YOU NEED. IF YOU BLOW OR DAMAGE THE ENGINE WARRANTY WILL NOT COVER THE ENGINE.FIRST OF ALL TO CHANGE ENGINE OIL YOU CRANK VECHICLE UP LET IDLE FEW MINUTES TO THIN OUT OIL THEN YOU TURN OFF ENGINE. YOU NEED TO RAISE VECHICLE USING THE FACTORY JACK.USE JACK STANDS. LOOK IN OWNERS FOR CAR JACK LIFTING LOCATIONS TO KEEP FROM DAMAGING ROCKER PANELS. AND PLACE A DRAIN PAN UNDER THE OIL PAN. UNDER THE VECHICLE.YOU NEED A WRENCH TO REMOVE OIL PAN DRAIN PLUG.WHEN ALL THE OLD OIL DRAIN OUT IN THE DRAIN PAN.SCREW BACK IN THE DRAIN PLUG TIGHTEN IT DONT OVER TIGHTEN STRIP THREADS.THEN YOU NEED SOCKET TYPE OIL WRENCH YOU USE WITH A 3/8 RATCHET WRENCH REMOVE OIL FILTER HOUSING.PLACE RAGS AROUND THE OIL FILTER HOUSING TO CATCH OIL SPILL. YOU WILL NEED TO GO TO THE DEALERSHIP FOR THE OIL FILTER AND FILTER HOUSING O RINGS. ONCE YOU GET NEW OIL FILTER AND O - RINGS INSTALL THEM IN THE OIL FILTER HOUSING.LOCATED OIL FILLER CAP ON VALVE COVER UNDER THE HOOD.REMOVE OIL FILLER CAP.POUR OIL IN ENGINE USING A FUNNEL.ENGINE HOLDS ABOUT 8.5 TO 9.0 QUARTS OIL. BUT LOOK IN THE OWNERS MANUAL CHECK HOW MANY QUARTS ENGINE NEED.CHECK OIL DIP STICK OIL LEVEL SHOULD BE ON THE FULL MARK ON THE ENGINE OIL DIP STICK.TO BE ON THE SAFE SIDE BUY 10 QUARTS OF OIL FOR A EXTRA.DONT OVER FILL MAKE SURE YOUR OIL LEVEL CORRECT.OIL DRAIN PLUG AND OIL FILTER TIGHT BEFORE CRANKING THE ENGINE.LOOK IN THE OWNERS MANUAL FOR OIL DIP STICK AND LOCATION.

FIRST OF ALL YOU NEED 4.0 QUARTS OF OIL FOR 2.2L 2.3L AND 2.4L OHC ENGINES AND THE 2.2L OHC USES 5.0 QUARTS WITH NEW OIL FILTER.TO GET START YOU NEED A FILTER WRENCH,DRAIN PAN, RUBBER GLOVES WHICH PROTECT HANDS FROM OIL. OILWILL CAUSE CANCER , IF STAYS ON SKIN TOO LONG.YOU NEED TO CRANK ENGINE UP LET IT IDLE 5 MINUTES TO THIN OUT MOTOR OIL SO IT CAN FLOW FASTER.WHEN 5 MINUTES UP.TURN OFF ENGINE.SAFELY RAISE SUPPORT VECHICLE ON JACK STANDS ON SOLID LEVEL GROUND.SLIDE DRAIN PAN UNDER THE CAR OIL PAN. PUT ON RUBBER GLOVES THEN REMOVE OIL PAN DRAIN PLUG ON BOTTOM OF OIL PAN USING A 15 METRIC SOCKET WITH RATCHET WRENCH.WHEN ALL OIL DRIPS.SCREW IN TIGHTEN OIL PAN DRAIN PLUG BACK IN OIL PAN REMOVE OIL FILTER ITS NEXT TO OIL PAN USE SOCKET TYPE OIL FILTER WRENCH IF OIL FILTER IS DOWNWARD POSITION. IF OIL FILTER ON THE SIDE YOU NEED THE BAND TYPE OIL FILTER WRENCH. ****** NOTE THIS THE 2.2L OHC ENGINE USES A OIL FILTER ELEMENT THAT HOUSED INSIDE A RECEPTACLE LOCATED AT THE LEFT FRONT CORNER OF THE ENGINE.YOU UNSCREW THE OIL FILTER CAP THEN LIFT THE CAP AND OIL FILTER FROM THE FILTER RECEPTACLE IN THE ENGINE.SEPERATE THE OIL FILTER ELEMENT FROM THE CAP USING A CLEAN RAG REMOVE OIL DIRT AND SLUDGE FROM THE OIL FILTER CAP AND FROM THE RIM AROUND THE OIL FILTER RECEPTACLES.INSTALL A NEW O RING INTO THE GROOVE IN THE CAP.THEN INSTALL THE NEW FILTER ELEMENT IN THE CAP AND INSERT BOTH INTO THE FILTER RECEPTACLE.SCREW DOWN THE CAP AND TIGHTEN IT SECURELY. WHEN ALL IS DONE POUR NEW OIL IN CRANK CASE.MAKE SURE OIL LEVEL ON DIP STICK ON THE FULL MARK YOU CRANK THE ENGINE.MAKE SURE OIL DRAIN PLUG SCREWED BACK IN OIL PAN.WHEN INSTALLING OIL FILTER FILL IT HALF WAY WITH NEW ENGINE OIL,RUB OIL ON FILTER SEAL TO HELP IT SEAL TO ENGINE.BESURE WIPE OIL FILTER SEAL SURFACE ON ENGINE TO MAKE SURE IT CLEAN. WHEN ALL IS DONE CRANK ENGINE UP CHECK FOR OIL LEAKS.IF ALL IS GOOD LOWER CAR BACK TO GROUND,YOU DONE.

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

The oil filter is towards the front of the car, underneath on the passenger side, at the corner of the engine cradle. Loosen the drain plug and drain the oil. Make sure the old oil filter gasket came off with the oil filter. Reinstall the new oil filter. Reinstall the drain plug and fill with 5 quarts of 10w/30 motor oil.

Look on the ground where you park it. That much oil has to be a leak. Don't let it get 2 quarts down. Check it more often. Use thicker oil. Like 10-40 instead of 5-30. You could even try 20-50.

When you say fluid ... I assume you talking about the oil and oil filter.
If you changing oil here are the steps :
1> Jack up the car, make sure you do not put the jack on the oil pan as it is most likely it will damage the oil pan.. rather put it on the frame which is little bit to the left of the oil pan. Trace the bolt to the rear of the oil pan.. I believe it is a 17mm bolt. Place the oil pan under the bolt and take the bolt off. Almost all your oil will drain out here. Make sure the oil cap on top of the valve cover is taken off.
2> About 10 inches to the top of the oil pan bolt .. you will find the oil filter. Usually you should be able to remove it with your hand, rotating it in an anticlockwise direction. The rest of the oil will drain out here.. so adjust the oil catcher pan accordingly.
3> Take the new oil filter and apply some of the old oil on the rubber gasket of the oil filter and tighten it back up in clock wise direction.
4>Tighten the bolt to the oil pan and lower the car from the jack or jack stand for easier access.
5> Put in 4 quarts of 5W30 or 10 W 40 through the oil cap on the valve cover.
6> Wait a few minutes and pull the car back a few feet. Check for leaks and you should be good to go.