yea just change it
it would be best if you ran all your gas our first
then put the other brand in
but it will take a little for the motor to break in to it
why you wanna switch from klotz? i run benol and i LOVE it, just like a hour ago my buddies dad smelled my blaster and asked me if i was running race gas. nope. its the klotz baby!!! lol great sh*t though I:I I:I