My 1-year-old Toro mower has the 6.75hp 190cc B&S engine. I just changed oil on it today before putting it away for winter. I drained the old oil through the dipstick by tipping the mower. I had it nearly upside down, no more oil wanted to come out. Afterward, I was only able to pour in about 14 oz before it reached max on the dipstick. According to the manual, oil capacity is 20 oz though. Anyone else had this happen? It would mean that about 1/3 of the old oil was still in the engine. Probably not a huge deal, but kind of sucks by BITOG standards...