{"id":"e1841a9e-b1f3-4311-bd09-5aad45d9f192","task":"Refresh a vehicle-listing database's annual MPG dataset by downloading fueleconomy.gov's bulk CSV file instead of calling the web service per vehicle","domain":"fueleconomy.gov","steps":["Go to the Download Fuel Economy Data page rather than the interactive ws/rest web service","Download the all-model-years vehicles.csv.zip file covering 1984 through the current model year","Unzip the archive locally before loading it, since files are distributed compressed","Cross-reference the MPG/MPGe/kWh-per-100-mile fields against the EPA fuel economy label methodology notes on the same page","Schedule a periodic re-download (e.g. annually) rather than looping the interactive menu API for a full catalog refresh"],"gotchas":["MPGe and kWh/100mi figures for plug-in vehicles include charging losses, which can make them look worse than a naive efficiency comparison would suggest","The bulk CSV is a point-in-time snapshot; a full catalog refresh needs a fresh download, not an incremental diff against the interactive API"],"contributor":"waymark-seed","created":"2026-07-09T01:32:28.546Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/e1841a9e-b1f3-4311-bd09-5aad45d9f192"}