Engine Oil Wear-Iron (Fe) Trend Tracker
Log iron in oil readings, see the wear trend and get a projected date when the 100 ppm limit will be reached.
Readings stay in your browser (localStorage) โ nothing is uploaded.
Straight-line (least-squares) extrapolation of your logged readings to the 100 ppm alarm threshold (warning at 60 ppm). A low Rยฒ means the trend is noisy โ log more readings before trusting the projection.
Field notes from maintenance practice
Iron alone says 'steel is wearing'; the companion metals name the part โ Fe with chrome means rings/liners, Fe with lead and copper means bearings, Fe with aluminium means pistons. Always sample identically: engine hot, from the same port, mid-drain stream. A silicon rise alongside iron is the classic dust-ingestion signature: check the air filter before the engine. The default action limit of 100 ppm comes from typical heavy-diesel condemnation guidance of 90โ150 ppm Fe at normal drain intervals (Caterpillar/Cummins fluid analysis tables; always use your OEM's limit for the engine family); adjust it if your OEM or procedure specifies otherwise.
Linear extrapolation is honest only when the Rยฒ is decent (โฅ 0.7) and degradation is steady. Iron accumulates with hours since the last oil change, so normalise mentally for drain interval: 60 ppm at 250 h is far worse than 60 ppm at 500 h โ log consistently sampled-at-drain values for a clean trend. If the last reading jumps far off the line, re-measure before believing it โ measurement technique drifts too.
Sources & references
- Caterpillar SยทOยทS / Cummins fluid analysis interpretation guides
- ASTM D5185 โ multielement determination of used lubricating oils by ICP-AES
Trend screening only โ confirm with a proper inspection before running equipment to a projected limit.
Engine Oil Wear-Iron (Fe) Trend Tracker for maintenance and reliability teams: Log iron in oil readings, see the wear trend and get a projected date when the 100 ppm limit will be reached. Free, private (everything runs in your browser) and ready for daily plant use.
About Engine Oil Wear-Iron (Fe) Trend Tracker
This tracker is a remaining-useful-life (RUL) estimator for iron in oil. Log a dated reading whenever you measure; the tool fits a least-squares straight line through your history and projects when it will cross the 100 ppm action limit (warning at 60 ppm) โ turning scattered measurements into a forecast date you can plan parts and downtime around.
How to use Engine Oil Wear-Iron (Fe) Trend Tracker
- 1Enter each dated measurement as you take it โ readings persist in your browser between visits.
- 2Adjust the alarm (and warning) threshold to your OEM or procedure limit if it differs from the default.
- 3Read the fitted trend, Rยฒ, days-to-alarm and the projected date โ then plan parts and downtime around that date.
Why use Engine Oil Wear-Iron (Fe) Trend Tracker?
- โLog iron in oil readings, see the wear trend and get a projected date when the 100 ppm limit will be reached โ computed instantly with the standard formula
- โ100% free and unlimited, with no sign-up, login or paywall
- โRuns entirely in your browser โ readings and asset data never leave your device
- โNiche-specific defaults and thresholds for iron in oil, traceable to the cited standards
Frequently asked questions
What limit should trigger action for iron in oil?+
The widely used limit is 100 ppm (typical heavy-diesel condemnation guidance of 90โ150 ppm Fe at normal drain intervals (Caterpillar/Cummins fluid analysis tables; always use your OEM's limit for the engine family)). Set a warning at 60 ppm so parts and labour are ready before the alarm. Your OEM manual or internal procedure overrides the generic figure.
Iron doubled but the lab marked the sample 'normal' โ who's right?+
You both can be: labs flag against population averages, but a doubling in YOUR engine's trend is significant even inside 'normal' ranges. Rate beats absolute. Pull the next sample at half interval; if the climb continues, look at silicon (dust), soot (injectors/duty), and fuel dilution first โ they cause most genuine wear accelerations and are all cheaper to fix than the wear they cause.
How many readings before the projection is trustworthy?+
At least 4โ6 spread over a meaningful fraction of the asset's life, with a fit Rยฒ of about 0.7 or better. Two points always make a perfect line โ that is curve fitting, not condition monitoring. Keep measurement conditions (load, temperature, location) consistent.
Is straight-line extrapolation valid for wear?+
It is the standard first approximation for steady-state degradation, and it is deliberately conservative to act on. Many failure modes accelerate near the end (bathtub curve), so treat the projected date as the latest acceptable intervention date, not a promise.
Where is my logged data stored?+
Entirely in your browser's localStorage on this device โ nothing is uploaded to any server. Export or note critical values elsewhere if you need a permanent maintenance record shared across a team.
Embed Engine Oil Wear-Iron (Fe) Trend Tracker on your website
Want Engine Oil Wear-Iron (Fe) Trend Trackeron your own site? Paste this snippet into any HTML page โ it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/diesel-engine-oil-iron-tracker" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Engine Oil Wear-Iron (Fe) Trend Tracker โ ToolJolt" loading="lazy"></iframe>Related Industrial tools
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