Why can't they make something that can be operated in the manner you've done for 50 years? They are using the science they used on over the road vehicles on slow moving tractors, many of which are not operated at high rpms, like going down the highway. They need to come up with a better solution.
Abolish the EPA.. tell California the emision standards they want will make everything made for use in that state will cost twice as much as everywhere else.. leave the rest of us alone... as for global warming, how many internal combustion engines were used by the dinosaurs when the entire globe was much hotter????.. bah@#!$