The US EPA seems to have a reasonable dataset for testing weight hypothesi: "Data on Cars used for Testing Fuel Economy" https://www.epa.gov/compliance-and-fue

The US EPA seems to have a reasonable dataset for testing weight hypothesi: "Data on Cars used for Testing Fuel Economy" https://www.epa.gov/compliance-and-fuel-economy-data/data-cars-used-testing-fuel-economy https://www.epa.gov/compliance-and-fuel-economy-data/data-ca... curl -s 'https://www.epa.gov/compliance-and-fuel-economy-data/data-cars-used-testing-fuel-economy' -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36' --compressed | xmllint --recover --xpath '//a[@class="file"]/@href' - 2> /dev/null | sed -e 's;^.*=";;' -e 's;"$;;' -e 's;^;https://www.epa.gov;' | while read url; do echo "Fetching $url"; curl -LO -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36' $url; sleep 2; done