No problem, just follow directions on the can, It took care a tickling noise in my 97 S10 4WD Blazer (put it into the oil) and the gas (cleans throttle, intake manifold so I've not had to do the dreaded top end service), and took care of backfire on a cub cadet 1028 (cleanup a sticking fuel shutoff solenoid 1 can to 3 (5 gallon cans) of gas. It does work over time. Keeps all my other gear in tip top shape. Also stabilizes the gas (both rec and ethanol blends) for up to a year or more.