KTM is not the only company by any means that specifies 10w-60 oil. As is true with any motor, and especially this one, being a big piston with high compression, the majority of the wear happens before the engine reaches operating temp, so the thinner the oil at startup the better. In other words, a 0w oil is best for any engine in the world at Registered. Joined Jul 1, 2012. 127 Posts. #61 · Nov 15, 2012 (Edited) moonshinerunner said: I use a 10/30W. The reason being is for better fuel economy, quicker revs etc. Semi synthetic. The recommend oil for my bike is Mobil 1 but here in Australia for 4 litres it is $100.00. I can buy other brands for around $38.00 for five litres. The W that is between the numbers stands for winter. The number after the W represents the viscosity of the motor oil at high temperatures. The higher the number, the thicker the oil will be. 5w-40 Vs 15w-40: Key Things In Common Multigrade oil. The 5w-40 and 15w-40 are both multigrade oil. The motor oil’s cold viscosity is essential because it will dictate the lubrication. For example, a 10w40 motor oil will be a lot thicker at startup than the 5w30 motor oil. This means that the 10w40 motor oil will cling to the engine’s moving parts more than the low viscosity of the 5w30 motor oil. Vay Tiền Trả Góp Theo Tháng Chỉ Cần Cmnd.

difference between 10w and 15w oil