Currently in my bikes, I'm running 15w40 Rotella t4 in an OIF Triumph Bonneville (huge capacity and never gets hot), Kawasaki semi-syn racing 2T oil in a H1 Kawasaki, and for my CBX that I'm finishing I'm considering what to run in an air cooled bike that will generated much more heat than my other air cooled motors I've used. Almost exclusively I run 15w40 T4 with no ill effects on any wet clutch air cooled motor but the CBX will have much higher cylinder head temps then I have used that oil in the past. CBX's tend to consume a little oil and when idling in traffic will consume more. I will not be using this bike in traffic or ambient temps over probably 75f max (Alaska) but it will be ridden hard when used. Cylinder head temps can get in the high 300s with these and though I have an external oil cooler and low ambient temps, I want to choose an oil that handles heat the best. It's been a while since I've even had to think about anything other than t4 and Kawasaki 2 cycle oil so I'm checking in for some recommendations based on first hand experience from high temp air cooled bikes that are ridden hard.
Oil capacity is 5.8 quarts with the cooler. Pretty big sump but this oil gets worked hard. Factory fill is 10w40.
Thanks
Oil capacity is 5.8 quarts with the cooler. Pretty big sump but this oil gets worked hard. Factory fill is 10w40.
Thanks