Interactive Workbench
Engineering Calculators & Diagnostic Lookups
Instant browser tools — metric (L/100 km, kW, Nm, bar) and US/UK (MPG, hp, lb-ft, PSI) units side by side.
Fuel Consumption & Road Trip Cost Calculator
Calculate total fuel volume (L and US gallons), trip cost, cost per passenger, and convert L/100 km to US & UK MPG.
Tire Size, Rolling Diameter & Speedometer Error Calculator
Compare stock vs alternative ISO metric tire sizes (e.g. 205/55 R16 vs 225/45 R17), ride height change, and speedometer error.
Automotive Engineering Unit Converter (MPG, kW/hp, Nm/lb-ft, bar/PSI)
Convert fuel consumption (L/100 km, km/L, US MPG, UK MPG), power (kW, PS, bhp), torque (Nm, lb-ft), and tire pressure (bar, PSI, kPa).
ISO 3779 VIN Structure Decoder & WMI Origin Lookup
Decode the 17-character Vehicle Identification Number: World Manufacturer Identifier (WMI), manufacturing region, and Position 10 model year.
Engine Oil Viscosity & OEM Specification Reference Tool
Cross-reference SAE J300 viscosity grades, API SP / ILSAC GF-6A standards, and European ACEA C2/C3/C5 sequences by make and engine type.
Scheduled Maintenance & Severe-Service Interval Calculator
Adjust engine oil, brake fluid, ATF/CVT/DCT fluid, and coolant intervals based on annual mileage and urban/severe operating conditions.
Used Car Pre-Purchase Technical Inspection Checklist
Interactive 20-point inspection scorecard covering VIN stamping, paint thickness (µm), OBD-II readiness monitors, cold start, and road test.