What is the best way to filter the oil used from (lets say) fries and use it as BIO- Diesel ????

..........How efficient is it???What is the best way to filter the oil used from (lets say) fries and use it as BIO- Diesel ????
I believe that the process requires more than filtering. Clean cooking oil does not make bio-diesel.


There is a procedure that is fairly complicated but possible for the hobbyist to do.


Try doing a little search on it.





While you are at it, I should point out that you need a diesel engine to burn it, you can destroy a gasoline engine by putting the wrong stuff in the tank.