I run with AMSOIL... Yankee Doodle Dandy stuff... from Debbens
Bl**dy expensive, but its damned good, designed for performance roller bearing bikes, just like a Zed
Complete overkill if not tuned to the utmost, but HEY, peace of mind
If the motors not tuned, any old sh*te would be OK as long as you change it frequently
Synthetic CAN make clutches slip, unless specifically made for BIKES.
Also, synthetic can harm ROLLER bearing cranks, coz they make the ball bearings so slippy, they don't ROLL< but slip in the bearings, causing damage/wear
Pay's yer money, make yer choice
Do a search on this site, as mentioned, LOADS of discussion about this
