It's possible, but I wouldn't bet that it was a thorough job.
It takes more than 15 minutes to let as much of the old oil to drain out as possible. Me personally, after removing the drain bolt and filter, I let her sit for about 45 minutes to get as much out.
Check the dipstick to see the oil color. New oil should barely be a light tan color, and also check to see if it's below or above the "F" mark. When checking the oil level, do this after the car has sat overnight and when the engine is cold.
Why not do the oil changes yourself?
__________________
Don't like what I post? Too bad. I really don't give a sh!t 
|