I've owned two Poulan chainsaws over the past 30 years and have had good results with them. My son bought a Poulan model PP4812AVX last year and the chain jumps off at least twice for every tank of gas that you run through. The saw hasn't got hardly any hours on it so the blade has to either be a dud or a bad design and, yes, we've kept the bar oil reservoir full and it is oiling. I've wondered if changing the blade would help. The OEM blade was made by Oregon. The Oregon replacement blade (combo pack) is a PN39272. If the replacement blade is no better than the OEM blade I won't be accomplishing anything by changing the blade. Any experience with this?