One for all those gorgeous bikers saving the planet out there.
Cheapest anywhere I've seen. Have been shopping around for my next oil change and came across this. Ends with their oil sale. Much cheaper than SCA (not sure if SCA will price match) Part No: A9625789
They also have the Castrol Activ 4T Motorcycle Engine Oil 15W-50 4L - 3384526 for $20 Part No: A5352002