good day folks, I am using Picco Boost .21 engine for my buggy,
Intially I had used a Gallon of 20% nitro, later used a bit less then gallon of 25%

recently someone told me to use 10% nitro as this will help with long life of engine.

Since I am still new bie and do not necessary care about winning races, and our track is also medium sized and little bumpy,

my question would it be ok to shift to 10% if this help me improve my engine life at expense of little performance I am ok with it?

The manual say to remove .1 MM shim if i were to use 10%, this is belive is one goes right above sleeve and there are two more shims under the button head.

Please advise. Thanks