You likely consider the cost of oil in aircraft operations often. While small oil waste may seem unavoidable, it can quickly add up to significant expenses, especially when we look at the bigger picture.
Oil spills can occur during the oil change process while topping up, or when disposing of oil leftovers.
But have you thought about how oil spills can lead to unnecessary next steps and bigger costs elsewhere? Have you ever assumed oil was leaking from the aircraft engine, only to discover it was just spilled oil?
Whether it’s a piston or turbine engine, helicopter or fixed-wing, large or small—oil spills still mean wasted time and money. Removing cowlings, cleaning the engine, running it to check for leaks—all for nothing, just to find there was no leak at all. Someone simply spilt oil while topping up.
That’s the indirect cost of what was assumed to be an oil leak.
The Problem with Improper Tools
I’ve seen many methods of topping up oil, but most involve improper tools and fillers, resulting in oil spills both outside the cowling and inside the engine compartment. Very often, oil ends up spilled over the engine itself. After just one flight, it’s everywhere.

The Solution: TheCanKey FunnelCap
To address these challenges, we developed TheCanKey FOD-Free FunnelCap for both turbine and piston engine oil. This innovative tool minimizes oil spills, waste, and contamination, offering an effective solution for aviation maintenance. Learn more about TheCanKey FunnelCaps and watch the video here.
Use TheCanKey FunnelCaps to:
- Avoid oil spills during use, thanks to the no-spill design.
- Safely store open, half-used oil cans without the risk of leaking—avoid unnecessary costs from wasted leftover oil.
- Keep oil off your hands or clothes, reducing toxicity risks.
- Prevent FOD in open oil cans with a tight closure. For extra protection, consider our DustCap.
- Avoid environmental fines from spilled oil.
The FunnelCap solutions include the FunnelCap with Bottle Fittings, Gallon Can FunnelCap, and Quart Can FunnelCap
Our FunnelCap product line includes:
These tools are designed for the safe and efficient servicing of aircraft oil and hydraulic systems. These innovative tools help prevent spills and Foreign Object Debris (FOD) contamination, making them essential for aviation maintenance.