So: I’ve already got everything you need for an oil change (oil: Castrol 10W40 partial synthetic, oil filter). I also bought an oil drain screw with a magnet. Now I wanted to know if this investment was useful at all, because for example the manufacturer KAWASAKI assembles the oil drain screws with magnets from factory. Meaningful sounds already, because if any metal chips are in the oil, then these are from the magnet of the drain cartridge Thus the wear in the engine is also lower. Or what does YOU mean about it. Thank you in advance!