Should the government impose stricter fuel efficiency standards on vehicles?

No, but it should impose only moderate standers/more of a hands off approach while the market/people want more efficient standards on vehicles. Although I am in favor of better fuel efficiency it just I don't trust the government to implement those standers because I don't want government over reach and for it to take away what ever freedoms that U.S. citizens still have.

Yes but incentivize with offsetting increasing costs of fuel efficient vehicles by limiting price or with a tax return

No. Instead they should offer more incentives to e vehicle manufacturers and infrastructure companies.

Emissions regulations should be balanced with the carbon footprint, longevity, maintenance implications and research and development they impose. Regulations that create a shorter service life for vehicles systems don't serve the consumer or the environment.

No, vehicles themselves are inherently a problem, and the production of new vehicles, regardless of fuel efficiency, let alone EVs, have an incredibly high up-front cost in terms of carbon emissions and other environmental damage; the majority of the time, it is overwhelmingly better to use an older, pre-owned, less efficient vehicle than a new one; additionally, overly strict efficiency standards would disproportionately affect poor individuals who are unable to purchase new, compliant vehicles.