Clean Funnel™ is the funnel that keeps itself clean. Replacing the caps on each end after each use prevents left over fluid from dripping out, and keeps your work area or baggage compartment clean. No need to wipe your funnel out with a rag before reusing. Clean Funnel™ is ideal for use with fuel or oil as well as winshield washer fluid, detergents, antifreeze, hydraulic fluid, and more. Great for aircraft, automobiles, motorcylces, tractors, boats, ATV's snowmobiles, and more.
Model 428 (black) has 1-1/2 quart and 13-1/4" long with a flexible spout and 1-1/8" O.D. spout.
Absolutely MASSIVE!! Will not fit a 172 oil filler spout.
Had this funnel fit into the oil filler port on my Lycoming engine (TIO540-AKiA) I would have given it a 5 for the screw on covers on both ends. Unfortunately, it would not fit in my oil filler opening more than an inch, which would require that I support it in some way while adding oil. Dont know if it would fit Continentals, or other Lycoming engines, but it is useless for my needs. Great idea though. Does away with the need to stuff paper towels into both ends after use to prevent leaks. Hopefully, the manufacturer will see fit, at some future time, to re-manufacture it for aviation use.