The red circle is the location of the drain plug. Also, synthetic oil is over kill and wasted money in my opinion. Low oil casuess damage but in 50 years i HAVE ONLY SEEN 1 engine damaged from poor oil changes and that was caused by oil port pluggage.
O My income loves ethanol. Repeat or returns are a problem because they get it home and add water, I mean gas to the tank and expect my effort solves everything forever.