How we write our guides

The owner’s manual always wins

Specifications — oil viscosity, torque values, fluid types, service intervals — vary by vehicle, sometimes by model year. Where they vary, we say so and point you to your owner’s manual rather than print a single number that would be wrong for a third of readers.

When a page on this site and your owner’s manual disagree, follow the manual. It was written for your car; our guides are written for every car.

How guides are researched

Each guide is built from manufacturer owner’s manuals and service procedures, plus the mainstream automotive practice taught by established industry sources (the procedures a competent independent shop would follow). Steps are written to be performed by a first-timer with basic hand tools.

We deliberately cover the jobs a regular driver can do safely: tires, battery, fluids, and core driving skills. We do not publish guides for brake hydraulic repair — bleeding, lines, calipers — or for airbags, fuel systems, or high-voltage hybrid/EV components. Those go to a professional, and our guides say so at the point where you should stop. Checking a fluid level is owner maintenance; opening the circuit it belongs to is not.

Safety callouts over confidence

A step that can hurt you — hot coolant under pressure, a car held up by a jack, battery gas near a spark — gets a visible safety callout explaining the specific risk, not a generic “be careful.” Steps that are merely fiddly get none, so the warnings that appear carry weight.

Every guide opens with a disclaimer naming the conditions under which you should stop and call roadside assistance or a shop instead.

This is not left to memory. An automated check reads every guide in the library and fails whenever one describes a hazard — raising a car, opening a cooling system, disconnecting a battery, running an engine for more than a moment — without carrying the matching warning in a callout. It reads what the steps actually tell you to do, so a new guide is caught by the same rule whether or not its author thought about safety.

How cost estimates work

Where we quote repair or parts costs, they are typical ranges for the United States, intended to tell you whether a fix is a $20 problem or a $2,000 one. Actual prices vary with your vehicle, your region, and your choice of shop. Treat our figures as a sanity check, not a quote.

No sponsored content, no affiliate links

Car Basics accepts no payment from parts makers, tool brands, shops, or insurers, and no page on this site contains affiliate links. When a guide mentions a category of product — “a winter-blend washer fluid,” “a 6-point socket” — it describes a type, never a brand.

Dates and sources

Every guide, warning light, and tool carries a “last updated” date. It is not a publication date and not a marketing refresh: it is the date that page’s own content last changed, taken from the site’s revision history, and it is the same date the page reports to search engines. A page that has not needed a change keeps its original date rather than being re-stamped to look current.

Where a page states a specific figure that a public authority has fixed — a federal safety standard, a government specification — it cites that document under “Sources,” with the date we last read it. Pages without a Sources list are ones whose figures are mainstream practice rather than a citable rule; we would rather show no citation than one that does not really say what we claim.

Corrections

Cars change, and so does best practice. If you believe something on this site is wrong or unsafe, treat your owner’s manual and a qualified mechanic as the authority in the meantime — they always are.