Can somebody recommend a high quality oil to run in my 1990 Honda CBR600F that I recently purchased. It has 23,000 miles on it and is unbelievably fast considering I upgraded from a 1974 Yamaha 650 cruiser. I was thinking Rotella 5w-40 or 15w-40? Is there any robust brands that are fairly cheap that can withstand the tourture of a CBR600?