Diesel DEF and Oil Top-Off Log
Most vehicle apps track fuel and call it done. Modern diesel ownership means watching two more fluids that most apps ignore: Diesel Exhaust Fluid and the slow creep of oil consumption between changes. FuelHawk gives each its own dedicated log. DEF tracking keeps you ahead of the warning light; oil top-off logging builds a consumption baseline over time — often the first measurable sign that something inside an engine is beginning to change.
Frequently asked questions
- Why should I log DEF separately from fuel?
- Diesel Exhaust Fluid consumption is independent of fuel consumption and varies by load and temperature. Tracking DEF separately lets you anticipate refill needs, avoid an unexpected warning light on the road, and spot consumption spikes that could indicate an emissions system issue.
- How does oil top-off tracking work as an engine health indicator?
- FuelHawk logs each oil top-off with the amount added and the date. Over time you can see how quickly consumption is increasing between oil changes. Accelerating oil consumption — burning or leaking more than usual — is one of the earliest detectable signs of engine wear, valve seal issues, or a developing leak.
- Is the DEF log only for heavy trucks?
- No. Any diesel vehicle with a Selective Catalytic Reduction (SCR) system uses DEF — light-duty pickup trucks, vans, SUVs, and passenger cars included. FuelHawk's DEF log works for all of them.
- Can I link my oil specs to the Oil Change scheduled service?
- Yes. Store your oil type, capacity, and filter part number as saved specs for the asset, then attach those specs to the Oil Change service. When the reminder fires, your oil spec information appears right alongside it — no need to look it up separately.
- Can I track both DEF and oil top-offs on the same vehicle?
- Yes. FuelHawk maintains separate logs for fuel, DEF, and oil top-offs for each asset. You can view each log independently and build up a full consumption picture over time.