I'd follow the directions for best results. Kreen is volatile so it might have flashed off.
Originally Posted by D1dad
About 600 miles in right now with it in the gas and oil. I put the stuff in PP 10-30 before my son took a 450 mile trip back to school and according to where the dipsticks at, the kreen either burnt off or it used a half quart. I'm gonna have him get the oil changed at Walmart, against my better judgment, at 750-1000 miles. I have another quart so if this doesn't help then I'll do a piston soak.