[cockerpunk]

LowestWwhatever the factory recommends is always the correct the oil rating.

5w20 compared to 0w20, the 0w20 will wear the engine less.

oil is very misunderstood, the notion that thicker oil is better is wrong. oil must be thin to work properly. the issue isnt that oil gets thin when its hot, the problem is that its thick when its cold. thus, the thinnest oil while cold and the proper thickness while hot. thus, lowestW whatever the factory recommends.