"Quality adjustments are based on costs provided by manufacturers in categories such as reliability, durability, safety, fuel economy, maneuverability, speed, a

"Quality adjustments are based on costs provided by manufacturers in categories such as reliability, durability, safety, fuel economy, maneuverability, speed, acceleration/deceleration, carrying capacity, and comfort or convenience. Adjustments are also made when equipment is added or deleted from the tracked model. Adjustments are not made for changes in gasoline content due to mandated air quality requirements. Additional information is available in the Guidelines for Quality Adjustment of New Vehicles Prices document." (https://www.bls.gov/cpi/factsheets/new-vehicles.htm https://www.bls.gov/cpi/factsheets/new-vehicles.htm) The Guidelines for Quality Adjustment of New Vehicle Prices are at https://www.bls.gov/cpi/quality-adjustment/new-vehicles.pdf https://www.bls.gov/cpi/quality-adjustment/new-vehicles.pdf. New Vehicle CPI has increased 22% since 1990 (https://data.bls.gov/pdq/SurveyOutputServlet https://data.bls.gov/pdq/SurveyOutputServlet).