I just did the 2nd oil change on my Crossfire coupe, when I put in the new oil, I put in 7.75 quarts, knowing the capacity is 8.5 quarts, I didn't want to overfill.

When I checked the oil, it was over the line and into the plastic above the dipstick. I thought I was being conservative, but I ended up overfilling it. Doubled checked several times, it was absolutely over. I siphoned out exactly .75 (3 quarters) of a quart. to get me exactly at the top of the hash mark.

Based on that, I calculate about 1.25 quarts of old oil was still in the engine! I did a long drain, but I suspect that using only front ramps is the cause of this? All my other vehicles have oil pans designed to drain best on front ramps, but I suspect the M112 engine is designed best to be drain on a flat surface.

Has anyone else noticed this, that over a quart is left in the engine when oil changing on front ramps? I was expecting maybe half a quart would be left in the engine, but not over a quart. I don't remember having this issue on my last oil change.