I think its just cooking oil they use not sure though.... I can upgrade the BB gun to Co2 proberly 250fps with a better spring, but can't trust him with it at 9yrs, the pets would get shot!
I was shocked at the price of the Tamiya ones jees price of an old golf some.....

One good thing the tracks and gear train is metal unlike the early plastic ones that broke very quickly.
Top speed 15MPH on a tank
