I suspect it won’t happen for a while. Oil prices will simply adjust - i.e. fall until they reach some kind of equilibrium with CNG. Isn’t CNG’s problem energy density? Shouldn’t an all-CNG vehicle will require at least 50% more space for fuel storage? Aren’t CNG fuel tanks also heavier than the average gas tank because the walls have to be thick enough to handle the stresses of highly pressurized gas?
I agree. The magic question is: "How long is a while?"
Oil prices will simply adjust - i.e. fall until they reach some kind of equilibrium with CNG.
I doubt they fall that far, at least not beyond a very short-term dip if that. I don't see gasoline equaling CNG for many months before climbing.
Shouldn’t an all-CNG vehicle will require at least 50% more space for fuel storage?
About that much.
Aren’t CNG fuel tanks also heavier than the average gas tank because the walls have to be thick enough to handle the stresses of highly pressurized gas?
They are mostly carbon fiber these days, but yes, a I would expect tanks storing equal amounts of energy would have a heavier CNG tank.
But it all comes done to dollars per mile, in my opinion.