Motor oil tools
Quick, neutral tools to make sense of your oil. Every result is a general, educational guide — your owner's manual and OEM specification are always the final word.
What these tools use as inputs
Viscosity choices 13 grades
Sorted by winter rating and hot number, not alphabetically.
Spec labels 24 labels / 11 families
API, ILSAC, ACEA, GM, VW, BMW, Mercedes-Benz, Ford, Honda, Porsche, and JASO.
Vehicle lookup 4 data rows
Provisional car rows are labeled and must be checked against the owner's manual.
New manual-first tools
- Find your owner's manual Open official manual portals and record the oil fields before buying.
- Manual evidence builder Turn manual oil-section details into a copyable source-evidence packet.
- Oil label decoder Read API Donut, Starburst, Shield, GF-7A/GF-7B, and OEM approval cues.
- Verify oil approvals and licenses Check API, GM dexos, ACEA, and OEM claims against the current issuer source.
- Oil spec checker Compare what your manual requires with what the bottle label says.
- Wrong-oil emergency triage Get conservative next steps for wrong oil, overfill, low oil, leaks or warnings.
- Saved garage Save local oil-change cards and next interval reminders in this browser.
- Oil change cost estimator Compare DIY oil, filter, washer and supplies with a local shop quote.
- Oil consumption calculator Normalize a measured top-up interval across US and metric consumption units.
Can I use this oil instead of that one?
Pick what your manual specifies and what you'd like to use for a manual-first risk guide.
Choose both grades to see a general, manual-first risk guide.
How a grade behaves with temperature
Drag the slider to see the cold-start vs operating-temperature zones for 5W-30.
At 20 °C the engine is near ambient — the 5W winter rating governs how quickly 5W-30 reaches moving parts on start-up.
Which winter rating suits your climate?
Pick a climate for general cold-start guidance.
Look up oil by car
Year/make/model/engine lookup. The data layer is still being verified — listed vehicles show a provisional entry you must confirm against the owner's manual.