Engine hours, trip runtime and device counters are different
An hours figure means nothing until you know what resets it. Cumulative vehicle hours, one session's runtime, trip duration and a device's own counter are separate sources. Ask what starts, stops and resets the counter before you use it for maintenance.
Write down what the counter means
Request the source field, unit and reset conditions for the exact vehicle and device. Which engine-time fields exist depends on the vehicle and device. Ignition, location or a trip label alone cannot show engine running or productive work.
Agree the basis with maintenance
Keep the gap visible
- Mark an unsupported field unavailable, never zero.
- Note the date of any device replacement or reset.
- Investigate a reading that drops; do not repair history by adding counters.
- Let the maintenance team approve any alternative source and interval.
Where ReWheel stands
ReWheel FMS connects supported vehicle information with equipment and operational records for field and institutional operations. Vehicle compatibility, data-access requirements, connectivity and installation are assessed per deployment, never assumed. A workflow discussion gives you a written list of the engine-time questions to settle with your maintenance team.
Engine-time sources and reset-check worksheet
Use the table, or download the CSV worksheet. Keep unsupported lifetime hours unavailable.
On a small screen, scroll this table horizontally. Keyboard users can focus the table region and use arrow keys.
| Reading label | Scope to verify | Reset question | What it does not establish |
|---|---|---|---|
| Cumulative OEM engine hours | Explicit supported vehicle field with documented cumulative meaning | Counter replacement, reset or source change? | Availability on every vehicle or a complete service history |
| Since-start runtime | One documented engine/session start scope | Has a new session begun? | Lifetime hours from one session |
| Trip duration | Chosen trip start/end definitions | Did trip logic or the reporting period change? | Engine running for the whole trip, productive work or billable time |
| Device-accumulated counter | Device-specific accumulation rule and start | Was the device replaced, initialized or reset? | Vehicle lifetime hours without source evidence |
What ReWheel provides
ReWheel FMS connects supported vehicle information with equipment and operational records for field and institutional operations. Vehicle compatibility, data-access requirements, connectivity and installation are assessed per deployment, never assumed.
Continue with ReWheel: RW-F1 OBD GPS Vehicle Tracker
Discuss your workflow