Take care when collecting waste vegetable oil as it may contain water, which should not be in the fuel system of your vehicle. All water may not be removed by these filters alone. There are two types of water in oil: free and suspended. Free water is that which is not mixed thoroughly into the VegOil. The Goldenrod Waterblocker Filter will capture this type of water very well, and will clog when it is full - disallowing any fluids to pass.
 
Suspended water, which occurs when water is mixed in thoroughly with the vegoil, may make its way through a waterblocker element. This oil should be avoided if you are on the go, as settling and heating must be applied to remove this type of water. Starting with good oil is your best protection against water. For a complete discussion on this topic, read the WVO Filtration Guide.

Oil Source?

Finding free fuel is an exciting prospect, and it is a skill that anyone can learn. There is bit of a learning curve, but as any veggie enthusiast will tell you - research first, try it out, be persistent, and you ll be able to spot and filter good veggie like a pro! Generally Asian buffet places are golden. Read about where to look and how to ask for it in the WVO Filtration Guide and watch a video showing an oil hunt.

Filtering in Winter?

Oil filters best when it is thin. When it is cooler or cold out the oil becomes thicker which makes filters unnecessarily clog quicker and pumps work too hard. To mitigate this collect during the day when the sun has the opportunity to warm the container, or use a "bucket heater" to warm the oil up first.

Converting a Vehicle to SVO?

Vegetable Oil as Fuel works best in a fully converted diesel. Find full Diesel Conversion Kits for Cars, Trucks, Semis, and more. Just listen to the discoverer of vegetable oil as fuel: