6.6 duramax how many quarts of oil do I need for change

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"with the LF8 Isuzu Diesel, engine oil capacity is 23.7 quarts or 22.5 liters."

Put four litres or quarts in and check the level with dip stick if its down some then add another part litre or quart till its up where it should be.

Your gas tank should hold about 13.1 gal.s I believe and your oil for a oil change including filter is 4 quarts only....don't overfill! I own one so I know.

Buy 5 qts of oil. Drain the oil and replace the filter. Add 4 qts and start the engine. let it idle for a few minutes. Shut it off and recheck the level on the dipstick, use the last qt to finish adding to full if necessary.

Go into auto factor and ask for filters they will know what you need ,as for oil then use cheapest diesel /petrol oil you can buy 10/40 20/50 natural or synthetic it doesnt matter which but change it every 6000 m and oil filter every third oil change and you will not go wrong .Dont forget the antifreeze either -all year round leave it in as its to stop corrosion .

There is only one owners manual for the truck. The Trucks with the Duramax came with a Duramax Diesel Supplement Book. This is what you want.

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You need to run an engine cleaner through your engine. Drain about 1 quart out and pour in a bottle of cleaner. Let engine run for about 5 minutes and drain oil and change oil filter. You may want to consider doing this with the next 2-3 oil changes to remove all the build-up in the engine. You will tell a big difference. Also, some do this as I am one of them. During the winter months I use a thicker oil and during the summer the recommended oil weight. Just to assure you it's fine, read the owners manual and it should be in there about using a heavier weight. Good Luck

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.

As not to tell you wrong, I would take it to a quick change oil place, and have them do it this time....they know exactly what it needs, and ask them how many quarts it holds, for your information....