Just convert them to run ethanol or.methanol biofuels the greens are happy and you can double or more the output of the motor with levels of boost that you can never active with pump gas you have to go to racing grade 114 octane to be even come close to E85 levels of performance and E100 lets you go even higher. There is a reason Top Alcohol dragster cars use methanol and now due to toxicity ethanol instead these are cars with 3000+ horsepower engines and 250+ mph quarter mile times. F1 is going full biofuels soon with ethanol being the choice for 10000 r boosted V10s
There are probably other things as well, like regenerative braking. It is a question as to whether you can recover your costs with the piddly amount of electricity you generate from that, but it’s still interesting imo.
As usual, total lie from our resident promoter of unreality.
Because then they whine about tire dust.
They are already doing it.