Oil light comes on and "bings" when the tack shows 1000 rpm.

Thats mean your oil line needed to be change.

Remove valve cover and check for excessive sludge build up that may be restricting oil return passages in cylinder head.

no not normal. possibly oil pump going out. seek professional help a.s.a.p.

Your oil pressure sending unit is most likely the cause of this.

I show the capacity as 6.5 quarts, but owners report that 7.0 quarts with a filter change leave the level right at the top of the dipstick. Hope this helps.

get oil pressure test done and check for codes in PCM

have u noticed any blue smoke on start up or while driving if so possibly piston rings

Nowdays 1 Qt. in 3000 miles, really isn't that bad, even some new vehicles claim that's normal. I know with my current vehicles, both at approx. 150,000-160,000 miles, they won't use any for first while after an oil change, but then after mileage starts adding up again, they start to use a little, approx.I Qt, every 1000 miles or so, until it's changed again. I've switched to the high mileage oil, just for piece of mind, as they say it revives seals, and has added protection for the higher mileage engines.This time around I'm thinking of adding "Lucas" & see how it works, as I've heard some pretty good reports on it, just to see if it will prolong that oil breakdown, at mid change.

I had Walmart give me an ambassador package oil change years ago on a grand am and the nimrods never tightened the filter and the same thing happened to me. Even though I put oil in the engine seized within 48 hrs. Good luck! Get your documents ready because whether or not your engine fails you will still want to sue the oil replacement service worker for subsequent damages due to negligence.

Ok not to keen on newer vehicles actually prefer the carburated ones, but oil pressure is supposed increase on your gauge when accelerating. If it wasn't going up before and just staying at 40 the needle might have been stuck. But idle should be 40 lbs and when you work the moter (reving or driving down the road) the guage should show an increase for every 1000 rpm above idle. Second if you can get a hand held scanner (bought mine off ebay for $30) check for any codes in your computer you will probably find that you either have a bank running wrong or some other sensor that needs to be changed. I'd go with getting my own scanner it saves alot of money and time, garages make their money here.