Engine Oil

[Ex-Member]

The previous owner of my boat had it from new and was meticulous, money was not an object.  He left me volumes of instructions for everything plus loads of extras & odds and ends including enough oil to do the last service.  He used Morris Servol Performance Plus 15w-40 Premium Engine Oil, which I have no problem buying, but will I be paying over the top when there may be something else which is more than adequate? My engine is a Nanni Kubota 4.2 and uses the same oil for engine & gearbox.

[Ex Brummie]

This is the same oil I use and will change 4 times a year. All I know is that if I use a cheaper oil, I use maybe 1 litre between oil changes, whereas with the Morriss It burns none. For the sake of about £30 per annum (£7.50 per oil change) on original cost, deduct the 4 litres burnt so reducing to £18 per annum, why look to go cheap? Also, if the oil is not burning, them I reason it probably does a better job. Engine oil is an important contributor to engine cooling besides lubrication.