I have a Toro Bronco Tiller with a 126312/0023 E1 Briggs engine. It smokes really bad but I may have put in too much oil. It has 3 oil fill caps. I filled the top one until I could see oil. I have oil coming out of my air filter. Sometimes after running a while it will clear up. The motor has no dipstick to check oil level. I am confused as to how much oil to add to the mower and why it has 3 oil fill caps.