So I always ran Repsol 4T 10w-50 in my CBR1krr when I lived in Arizona as the dealers recommended the higher viscosity due to the Arizona heat. Well, I have 4 liters of the stuff sitting around and I'm about to store my bike away for winter and am contemplating running it in the RC51. I reviewed the instruction manual and it only shows 30 and 40 weight as recommendations. I always change my oil just before storing so the bike doesn't sit all winter with dirty oil.
A couple reasons I have given this some thought. First, I don't want the oil to be wasted and two, the Mobil 1 40 weight (3000 miles) that is in it now is pitch black. We all know the RC51 runs hot in traffic which explains the black oil.
I'm sure it will be fine to run but want some opinions of others who have more experience with the RC51. Afterall, I've only had it for a year.
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