The columns that earn their place
Ask owners who've kept a log for fifteen years and the same columns come up: date, odometer, service, parts or vendor, and cost, with a notes field for the details you'll want later — oil spec and quantity, part numbers, torque values, which shop did the work. Serious DIYers on forums like IH8MUD often go further, tracking purchase date versus install date for parts, and keeping a separate "coming up" sheet as a manual maintenance calendar. The template above ships the core columns plus notes; add specialist columns only when you feel their absence.
One structural tip taken from long-running logs: one row per event, one sheet (or tab) per vehicle. Resist merging fuel and service into a single undifferentiated list — a "type" column keeps fill-ups, maintenance, repairs, and mods separable, which is what makes totals and filters useful years later.
What spreadsheets do well — and their two blind spots
A spreadsheet log is genuinely good: free, flexible, portable, and yours. For many owners a cloud-accessed sheet is a real workshop tool — plans, specs, and history in one place. But two failure modes recur in every forum thread on the subject. First, reminders: maintenance is due on a distance basis while calendar apps remind on a time basis, so mileage-based services slip — the classic story is the owner who realizes from their own spreadsheet that a car went unserviced for over a year. Second, capture friction: retyping from memory at a desk means entries lag reality, get rounded, or never happen — and a phone at a gas pump is a miserable place to edit a spreadsheet cell.
Template now, import later — no lock-in either way
This template's CSV is deliberately shaped to match Odobook's import format. Run your log in Sheets or Excel for as long as it serves you; if the blind spots start to bite, import the file into Odobook and continue the same history with reminders by date and odometer, automatic fuel economy stats, and receipt photos attached to entries. Everything stays on your device, and CSV export remains free forever — so the road back to a plain spreadsheet is always open. That symmetry is deliberate: a maintenance log should never be hostage to any tool, including ours.