Okay I have Killed GARFIELD!!!!!!

Since he is dead, yes get the two stroke fuel....Because well your nitro car is a 2 stroke (no brainer)

Second each time you change nitro content you will have to adjust your needle valve (hi speed only) accordingly about 1/8 of a turn rich or lean depending on your situation. This takes 35.7 seconds and is also a (no Brainer)

tom