How do you answer the 1st with out ******* off the 2nd ?
The diesel engine was invented over 100 yrs. ago by Rodolf Diesel in Germany , and he intended farmers to have a tractor that they could make there own fuel [ vegitable oil ] .
there is basicaly 2 ways to go , 1 used cooking oil, filter very well and use a fuel preheater , start on petrol diesel till eng. is warm , then switch to bio. / veg.
some time before turnning eng. off switch back to petrol , to get bio out of fuel system , then shut down . - not my choise -
2nd is transesterfication , using lye & methinall alchol [ to early to spell ],
this is to remove all water & gliserin [ about 20% ] and just put in tank , no mods , except if you have rubber fuel hoses , about 94 and earlyer .
Lots of info under the alterntive fuels form .
I've got it figured to about . 40 cents per. gal. after collecting used oil and my labor , the . 40 is the lye , meth , and electic .
If I was closer I would be happy to take that cooking oil off your hands.