Zaezzd · Engineering Reference & Ownership Tools
Clear answers on car maintenance, specs, diagnostics, and road trips
Factory specifications for 75 makes and 579 models, SAE/API/ACEA fluid standards, OBD-II trouble codes, NHTSA & EU recalls, and 7 engineering calculators.
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.
Browser Vehicle Profile (Stored Locally)
Save your car in this browser for quick spec & interval reference
100% local in your browser (localStorage) — no account, no registration, no cloud sync.
Makes & Models
All 75 Makes & 579 Models
Toyota
Toyota technical specifications, maintenance intervals, fluid capacities, and tire pressures across 32 models.
Volkswagen
Volkswagen technical specifications, maintenance intervals, fluid capacities, and tire pressures across 19 models.
BMW
BMW technical specifications, maintenance intervals, fluid capacities, and tire pressures across 18 models.
Mercedes-Benz
Mercedes-Benz technical specifications, maintenance intervals, fluid capacities, and tire pressures across 17 models.
Honda
Honda technical specifications, maintenance intervals, fluid capacities, and tire pressures across 14 models.
Hyundai
Hyundai technical specifications, maintenance intervals, fluid capacities, and tire pressures across 18 models.
Kia
Kia technical specifications, maintenance intervals, fluid capacities, and tire pressures across 18 models.
Ford
Ford technical specifications, maintenance intervals, fluid capacities, and tire pressures across 14 models.
Audi
Audi technical specifications, maintenance intervals, fluid capacities, and tire pressures across 16 models.
Nissan
Nissan technical specifications, maintenance intervals, fluid capacities, and tire pressures across 24 models.
Mazda
Mazda technical specifications, maintenance intervals, fluid capacities, and tire pressures across 14 models.
Volvo
Volvo technical specifications, maintenance intervals, fluid capacities, and tire pressures across 11 models.
Tesla
Tesla technical specifications, maintenance intervals, fluid capacities, and tire pressures across 4 models.
Porsche
Porsche technical specifications, maintenance intervals, fluid capacities, and tire pressures across 6 models.
Peugeot
Peugeot technical specifications, maintenance intervals, fluid capacities, and tire pressures across 15 models.
Skoda
Skoda technical specifications, maintenance intervals, fluid capacities, and tire pressures across 9 models.
Compare
Head-to-head comparison
Toyota Camry vs Honda Accord
Side-by-side engineering comparison of Toyota Camry and Honda Accord: exterior dimensions, wheelbase, ground clearance, cargo volume, powertrain output (hp/kW), fuel consumption (L/100 km & MPG), and scheduled maintenance intervals.
Toyota Corolla vs Honda Civic
Side-by-side engineering comparison of Toyota Corolla and Honda Civic: exterior dimensions, wheelbase, ground clearance, cargo volume, powertrain output (hp/kW), fuel consumption (L/100 km & MPG), and scheduled maintenance intervals.
Toyota RAV4 vs Honda CR-V
Side-by-side engineering comparison of Toyota RAV4 and Honda CR-V: exterior dimensions, wheelbase, ground clearance, cargo volume, powertrain output (hp/kW), fuel consumption (L/100 km & MPG), and scheduled maintenance intervals.
Hyundai Tucson vs Kia Sportage
Side-by-side engineering comparison of Hyundai Tucson and Kia Sportage: exterior dimensions, wheelbase, ground clearance, cargo volume, powertrain output (hp/kW), fuel consumption (L/100 km & MPG), and scheduled maintenance intervals.
Hyundai Elantra vs Kia Cerato
Side-by-side engineering comparison of Hyundai Elantra and Kia Cerato: exterior dimensions, wheelbase, ground clearance, cargo volume, powertrain output (hp/kW), fuel consumption (L/100 km & MPG), and scheduled maintenance intervals.
Hyundai Santa Fe vs Kia Sorento
Side-by-side engineering comparison of Hyundai Santa Fe and Kia Sorento: exterior dimensions, wheelbase, ground clearance, cargo volume, powertrain output (hp/kW), fuel consumption (L/100 km & MPG), and scheduled maintenance intervals.
SAE J2012 / ISO 15031-6
OBD-II Codes
Catalyst System Efficiency Below Threshold (Bank 1)
Oxygen sensor 2 (downstream) waveform mirrors upstream O2 sensor, indicating reduced oxygen storage capacity in the three-way catalytic converter.
System Too Lean (Bank 1)
ECM has added more than +20% to +25% combined Short-Term and Long-Term Fuel Trim on Bank 1 to maintain stoichiometric λ = 1.0.
System Too Lean (Bank 2)
Excessive positive fuel trim correction on Bank 2 cylinder bank.
System Too Rich (Bank 1)
ECM is subtracting more than -20% fuel trim on Bank 1 due to excess fuel or restricted airflow.
Random/Multiple Cylinder Misfire Detected
Crankshaft position sensor angular velocity fluctuations indicate combustion misfires across two or more cylinders.
Cylinder 1 Misfire Detected
Crankshaft acceleration drop isolated to Cylinder 1 firing event.
Cylinder 2 Misfire Detected
Combustion misfire isolated to Cylinder 2.
Cylinder 3 Misfire Detected
Combustion misfire isolated to Cylinder 3.
Guides
Maintenance & Guides
Engine Oil Viscosity & Standards Explained: SAE J300, API SP, ILSAC GF-6, and ACEA Sequences
How to match cold-cranking viscosity (0W/5W), HTHS shear stability, Low-SAPS ash limits (ACEA C2/C3/C5), and LSPI protection (API SP) to your engine.
Complete Automotive Fluid & Belt Replacement Schedule (15,000 to 120,000 km)
Preventive replacement intervals for engine oil, DOT 4 brake fluid, ATF/CVT/DCT transmission fluid, coolant, spark plugs, and timing belts.
How to Read Tire Sidewall Markings: Size, Load Index, Speed Rating, DOT Age & 3PMSF
Complete engineering reference for ISO metric tire sizing (e.g., 225/45 R17 94W XL), DOT manufacture week/year, and winter 3PMSF homologation.
Used Car Pre-Purchase Technical Inspection: Paint Thickness, OBD-II Live Data & Mechanical Checks
How to verify structural integrity with a coating thickness gauge (µm), detect recently cleared fault codes via OBD-II Mode $01/$06, and test powertrain health.
Understanding OBD-II Fuel Trims (STFT & LTFT): Diagnosing Vacuum Leaks, MAF & Injector Faults
Using Short-Term (STFT) and Long-Term Fuel Trim (LTFT) percentages at idle vs 2,500 RPM to pinpoint air/fuel ratio faults without guessing parts.
12V Battery (Flooded, EFB, AGM) & Alternator Testing: Cold Cranking Amps and Voltage Reference
Open-circuit resting voltage vs State of Charge (SoC), minimum cranking voltage drop, smart alternator charging ranges, and AGM/EFB replacement rules.
| Makes & Models | 75 Global Makes · 579 Vehicle Models |
|---|---|
| Compare | 35 Side-by-Side Technical Comparisons |
| OBD-II Codes | 32 SAE J2012 Diagnostic Trouble Codes (P0/P2/B/C/U) |
| Calculators | 7 Interactive Engineering Calculators (Metric & Imperial) |
| Recalls | 12 Reference Campaigns · 14 Official OEM Portals |