You 4 stroke owners make me laugh....
Just to give an idea of oil usage and top up's I will give my figures...
The last 2 trips with my 90 E-Tec have totaled just about dead on 400 km...used 161 litres of fuel and 1.1 liters of xd100
Now I did venture 75 km's offshore both times,weather was good and I drove at cruise speed but the stats say that I'm getting near 2.5km per liter of fuel and around 145 to one with the oil ratio ...i think my oil reservoir holds around 3 litres which means i can get over 1000 km's between fill ups.
So to put it in perspective with a 50 hp E-Tec driven in your average inshore conditions topping up of oil may only be needed very infrequently...with all the other regular maintenance it would be very insignificant...
Not that I am stating that they are a better motor at all...
Just that topping up oil in the smaller E-Tec's will happen so rarely that you may actually forget to do it until a beeping sound starts and a light comes on the guages that tells you that it's time to top it up.
Scott