About 1.5 years and 4000 miles ago, I got a oil change at a local shop for my 2006 1.8L Nissan Sentra. Just last weekend I decided to change the oil and filter on it myself and to my dismay the amount of oil that came out was 4.5 quarts -- which alarmed me since the car only takes 3. Presumably this was due to operator error, but what I don't know is if 4.5 quarts was originally put in or if it was 5 and 1/2 quart burned off.
I'm aware that having too much oil is potentially harmful, but now that I've discovered this, how should one proceed going forward? Things I'm currently thinking of are:
- Check the oil level myself more regularly, to see if it is now burning oil due to any damage done.
- Ordering a UOA (Used Oil Analysis) kit from blackstone, to see if it reveals any accelerated wear occurred, and to see if they even used the right type of oil (5w-30).
- Looking at various aftermarket additives, treatments, cleaners etc that may help clean up any carbon deposits.