That laughing gas is good.
I used it on my Buick with no problems. In fact when I remove my stock heads to install my new Champion irons the heads gaskets were in excellent condition and that's after many passes on the juice. Timing and fuel is the key!! 
I used it on my Buick with no problems. In fact when I remove my stock heads to install my new Champion irons the heads gaskets were in excellent condition and that's after many passes on the juice. Timing and fuel is the key!! 
