I just fired up a 235 that I bought and oil overflowed the oil canister after I put in a new filter. It was old oil cause I didn't want to waste money on new oil if the motor wasn't any good. Anyway, I had A filter so I used it. Took out the filter and no overflow. Just bought a new filter and will try it again with new oil. By the way, that Kroil's oil used for stuck stuff is the bomb!!!! That's reall really good to u older (not old, just older!) guys. This 235 smoked like a train at first. I let kriols soak about a week and the first time I fired it up, no smoke!!! Unbelievable. good advice/info-thanks