Oil light came on. checked oil and it is fine. car does leak about a quart of oil every two weeks. is this a oil pump problem. if so, how do i check

Since you recently bought this car, did the seller inform you that the car had a problem? If they didn't and knew there was a problem (and 1-2 quarts a week oil consumption is something they would know) that is fraud.

Did you have oil residue on your plugs when you pulled them out and checked them? Which cylinders did you have the oil residue if any?

If you are burning 1-2 quarts of oil a week your tail pipe should be black if not oily. Is your car smoking badly? Have you considered doing a compression check to find out the health of your engine? I would if I was in your position.

Although you seem to be the handy type of guy, rebuilding an engine is not for the light hearted without a thorough mechanical background. Depending on your knowledge base and tool inventory and rebuilt engine might be the way to go.

That is strange. Do not rule out the possibility that you have a leak somewhere in the vehical. I would check this out immediately, or it is going to cost more in the long run. Check the oil pan and the ground where you park your vehical.

Get a compression check at a modern shop.

2 quarts in a week is a lot. Check your positive crankcase ventilation PCV pipe (and valve if you have one). If the pipe is clogged or the valve is stuck shut then this could cause pressure to build in the crankcase and force oil vapor past the piston rings to be burnt. The amount is so fine per stroke you would hardly see it in the exhaust plume, this is not like worn valve guides where drips of oil cause great clouds of blue smoke. If the PCV is OK you need to have your engine dry and wet pressure tested to determine if you have worn rings

WELL NO OIL LEAKS.WARRANTY MIGHT COVER IT BUT YOU NEED TO SHOW ALL OIL CHANGE RECEIPTS.ALSO YOU HAVE TO USE GM MOTOR OIL LIKE 5W - 30 VALVOLINE USE GM OIL FILTERS.THEY WILL CHECK TO MAKE SURE YOU BEEN KEEPING UP WITH SERVICE MAINTENANCE AND SERVICE SCHEDULES.CHECK YOUR OIL LEVEL ON DIP STICK SHOULD BE AT FULL MARK LINE. THE CHEVY COBALT LS LT LTZ 2.2 ENGINE HOLDS 5.0 QUARTS OF OIL WITH NEW FILTER AND CHEVY COBALT SS SC HOLDS 6.0 QUARTS WITH NEW FILTER.IF OIL LEVEL LOOK OKAY.CHECK ON INTERNET FOR ANY RECALLS OR ANY TROUBLE WITH EARLY OIL PUMP FAILURE.

in many country's oil standart is deferent for example in indonesia, there is only twop season... so they using oil with sae 30-40, but in europe they using oil wiht weigth viscosty more heavy...

oil good using for 10.000 km, or approximetely 25k miles..

there is some solution... check the engine if there no oil leak, so your car is fine...

have that checked ASAP. its going somewhere.

Check for oil leaks, oil cooler, turbo, hoses. etc... if there is no leak then maybe you need to replace the piton rings.
frm: teh of philippines

You must use 5w\40 or 10w\40 remember BMW recommends castrol for engine oil

Check the Seal around the Oil Pan Drain Plug. If this Seal is Missing or Warped it will slowly leak oil.