Burning 1 qt oil 2007 grand caravan sxt per 1000 miles. changed pcv vale still happenung

check for a vacuum leak from a hose not connected
possible transmission actuator , brake booster hose, pcv hose or vent controls hose

generaly oil burning will not cause the engine to seize, just the lack of oil ,if it burning it real fast you could run out of oil and then seize the engine,how much oil does it burn, the industry standard is 1 qt. per 1000 miles, if it using more than that it could be the rings on the piston, first has the engine oil been changed regular, if it has been then i would suspect that its not the rings and more like the valve guides and seals

all engines burn oil, ALL!
and if you dive faster, it burns more. (rate)
you did not state the rate, here in USA we do
quarts per mile (liters are same )
1 qt/ 3000 miles is norm.
but if you dont service a vehicle , for sure every 60miles.
100km. the PCV valve will clog and the crankcase will go over
pressure, and the car will leak and burn more oil.
the dip stick hole must **** not blow.
if it dont **** , running, the PCV is DEAD !
(1960 to present same deal)

My 1993 voyager is like that. It may burn some , it definitely leaks some , and it could be just sending some through the PCV valve. Oil leaks and burning oil causes pollution . If you can fix it with a new seal or a valve cover gasket it is easier than constantly checking your oil. Temperature, trailering, speed, outdoor temperature, and engine RPM all can be factors if you are losing oil. If your engine is a quart down, the engine oil consumption rate doubles or triples. In other words the lower the oil level the faster it disappears. High mile cars will drive for years as long as you add oil when it is needed (keep the oil level between the marks). Fix any obvious leaks. Then determine your oil change interval (3000 miles, 4000 miles, 5000 miles). I change between 4000 and 5000 miles. If i am a quart low at 3500 I add a quart. If I am a quart low at 4500 miles I just change the oil in the car. A good practice is to carry a quart of oil in your vehicle just in case you need it. It is far cheaper to add a quart when needed than to go to the dealer once to maybe fix a problem that they may not be able to find or fix. Older engines (even some newer ones) just use oil , especially in hotter climates. Fix the obvious and carry a quart.

You should never buy any van type vehicle, in the first place,
the transaxle will fail any day.
I used to own a trans repair shop

Other then sell it,I would,I won't ride in one, not safe

Your correct,you should go 5000 miles and maybe use a 1/2 qt,
on most vehicles, none.

So you do a cylinder leak down test
Check Emission Gas Readings,to see what that shows
I suspect a broken oil ring,scored cylinder, broken piston
skirt or serious cylinder head issues.

Never go to a dealer. Calling or Visiting is okey

You are most likely burning it. There is much less smoke produced these days, with the cat. converter.

A wear area on yoru vehicle is valve stem seals, when they go, oil is actually pumped out...

Also, consider a high mileage blend oil, like casteroil. I am not into mechaninc in a can, but this stuff lowers consumption and is semi synthetic...

You can reaseal the valve stems, but I wonder about guide looseness, and fairly rapid seal failure again...Still, you can get it going and sell the vehicle....

is the car smoking blue or is the oil leeking out ?

if the is consuming oil by buring it while driving the faults are either :

Valve seats / Burnt valves
Piston Rings
or sump compression which can force oil into the combustion chamber causing it to burn it and expel the burnt oil via the exhaust system.

Either way, its going to pretty expensive on a 2002 5 series.

5000 is too long in between oil changes for that vehicle. Change it every 3000

under warranty? how many miles? what engine? what kind of driving do you do? what brand and weight of oil do you use? is all this well documented?......I think 1 qt per 800 or 1000 miles is considered normal, but I would talk to the service manager at the dealer about it. theres got to be a problem with that.

I had same problem....valve seals were bad....dealer fixed free...warranteed 7 years or 70,000 miles...good luck!