...well not really...but it does seem that anything works as long as it is filled up. I talked to a Midwest Honda parts dealer and he said that pressure lube and a filter makes a lot of difference and the better synthetic oils extend life quite a bit with this type of set up. A splash set-up is oly a disaster when mowing inclines and when the oil gets used up. Tolerances on splash engines is looser. You need to chesk the oil more often and a heavier viscosity (30wt) is best.