Search the net; there are several Oil-Test sites out there. Mobil-1 Syn is one of the highest rated oils you can buy. Also, you may want to look at a Purolator Pure-One oil filter, part# PL14610.I was curious about the diff. types of oil to use in our fury motor. I have a buddy that rides a VTX1800 and uses Mobil 1 light truck 5w40 fully synthetic. My question is has anyone done any research on this oil in our bike motor compared to OEM Honda? HIs oil filter is the same as a Honda civic. This would be cheaper for us if we can find out any good info.