Any substantial different in performance for 25%油 and 30%油?
Will 30%油 more easy to damage the engine?
C-hings, please share your experience?
Many thanks!
If under the same brand, 30% give you more torque less run time.
30% also easier to tune.
30% more expensive!
30% you need to add more head shim and use higher number plug "Cooler plug."