Home [wwwnnel] The Mr. Funnel Fuel Filter is specially designed to filter out water, dirt, and debris from most fuels including, gasoline, diesel, heating oil, and kerosene. These harmful contaminants can lead your engine to a loss of efficiency, engine shutdown, or even system failure.Models · Contact · FAQ Amazon: water filter funnel Amazon: water filter funnel. Skip to main content. Try Prime All Mr. Funnel AF8CB Fuel Filter. 3.7 out of 5 stars 262. $31 $ 31. 95 $37 $37. Get it as soon as Thu, Aug 29. FREE Shipping by Amazon. ProTool 3-in-1 Multi-Purpose Funnel with Extension & Removable Debris Screen.