I can get enthusiastic about things sometimesoh ok. Sounded like you work for an oil company........get on ur bike!!
like when changig something in/on my car (tyres, oil, filters, etc)
so i do my research, and this is what came out
I changed my habbit using 5w-40 castrol slx formula to the 5w-30 edge, and the thinner oil helped reduce petrol consumption and also the oil pressure builds up earlier in the winter time. I run the car mostly on short distance (<15km) so those are important factors to me.
if you do track days then you probably need something higher viscosity in the warm side like the 10w-60 edge sport but in normal conditions 30 on the warm side is more, than enough.
sorry if I do sound like a marketing guy for any oil company, I am not. really