I have one for fuel and one for air filter cleaner/oil. Don't try to use the filter sock like in the picture...it will fit beautifully over the funnel like that but the fuel (for me, anyway) splashes on the filter. Instead, I put it on like in the photo, then push down in the center until the elastic is just at the lip of the funnel. No spillage, high flow rate.
I got the smaller capacity and it works well for transferring gallons of material at a time, though I'm sure the large one would be faster.
The size of the narrow end is somewhat annoyingly exactly the same size as pour spouts on metal solvent cans, but clearly you can also get another funnel and use the filter for that.
Also, the picture does not display it well, but there is a brass screen built into the bottom of the funnel in addition to the prefilter sock.
Do yourself a favor and buy this. Its cheap insurance making sure you have clean fuel going in your machine. I grew up using one. I had to finally buy my own. You will be shocked and the crud that this thing will catch. I bought the 6qt on accident, its absolutely overkill massive. But works just fine other then I look goofy filling up with it.
I have had 2 fuel pumps fail on 2 different machines and when I replaced them found a fair amount of dirt in the system. I'm not sure if the dirt caused the fuel pumps to go out but I'm sure it didn't help. Bottom line the cleaner you keep the fuel the less likely hood of problems
I recently bought the larger 6 qt. funnel. I will be using this item from now on. It works very well as the fuel travels quickly through funnel, yet it filters out even the smallest particles. I am planning to buy another to use with tractor, lawn mower, log splitter, maybe even the car. I think it would work well right from the gas pump into the cars fuel tank! Very good product. Everyone should use one who is concerned about dirt in their gas.
i dont run a filter on my bike, so when i fill up my fuel jugs at the pump i run it through this filtered funnel. The amount of crap it collects is unreal. The thing i dont like is its so big you cant see your fuel level in your tank while filling. Thats why i filter the fuel going into the jug rather than the bike.