2008 mitsibushi endeavor using 2 to 3 or more quarts of oil every 3000 miles and dealer says this is normal and I know it is not.

Depends on make and model. Cadillac Northstar engines often use a quart between 3000 mile changes, and this is considered normal.

Though I am not familiar with the 2007 model, on the e46s, I know that the low oil light comes on when you are down only about 1/2 quart. Does your model have a dip stick?
A half quart in 3000 miles is not cause for concern. Most of them burn a bit less than that, at least during the first 200k miles, but some burn more. It depends to some extent what kind of oil you are using. It will burn more Mobile1 than it will Castrol Syntec, for example.
I have an '04 330 that uses about a half quart in 7k miles between oil changes, and an '04 325 that goes through a quart every thousand miles. I am only a little concerned about the 325. I would not be at all concerned about a half quart in 3k miles.

what oil are you using?

it is not normal for that engine to use that much oil. i know of another grand prix like yours that lost the engine and the dealer had to replace it. something is wrong with that engine. maybe talk to another gm dealer. good luck

No more than 1 quart between oil changes ... usually about 3000 miles under most circumstances.

No it's not have your engine check for oil leaks, also have then do a wet and dry cylinder compression test this will let you know if you are burning oil, also have them check the spark plug's.Hope this was helpful.

That is NOT normal usage... I would escalate the issue to the Service Manager and insist that they resolve the problem.

If you do not get satisfaction, ask for the name and phone number for the district manager and make the call to complain. You may also consider taking the truck to a different dealer.

That is surprising and I'm sorry to read of your troubles. We have an 05 Legacy 2.5i with 68k+ miles and plugging along good so far......

I don't know what state you're in but there should be a lemon law applicable to the problem you're having. You're obviously under 3yr/36k manufacturer warranty. If I were you I'd formally request repair of the problem and not accept test/diagnosis without action. Sounds like you're getting a run around......

Figuring off of national standards thata gasoline engine is allowed to burn 1qt. of oil every 2,000 miles tthey would be correct.But That is not to say for that particular engine providing that oil has been changed every 3000 miles,There could be other problems contributing to your car,for instance cklogged pcv valve,leaking injectors or fuel preasure regulator both can cause fuel contamination to engine oil (Dillution) Thins oil too much,or overheat condition,or failed cat convertor.With this in mind talk with another Nissan dealer if only by Phone.

I had the same problem with my wife's 2006 passat turbo. We lost 2.5 quarts in 3000 miles and the warning light came on. They put us on a 1000 mile oil test and I lost 1.8 more quarts of oil. They finally agreed to replace the rings. Service tech told me that the factory rings are defective, they begin to lead after about 25,000.