I have a 01 YZF426 and I am currently using Motul 300V 100% synthetic oil but it is pretty expensive for an oil change for me ( $20cdn a litre plus tax). So i don't get to change my oil as often as i should. So i am just wondering if i should keep doing what i'm doing or switch to a cheaper oil and change it on a normal basis like i should. Someone told me that if you go to a cheaper oil its not good for a bike thats amune to the expensive stuff. not sure if it true...but any info on what i should do would be nice. I don't race my bike or anything, I just drive on the trail with it, but might go to a few races. People say that once you go synthetic, stay synthetic....what do ya think? thanks alot!