i try not to watch most of the myth buster stuff because quite abit is miss info or cant be aired due to sponsor issues.
the used cooking oil does work but if you live in the uk where its more chilly then i would do as top gear done and add in 3% white spirit and let stand for a week before refiltering and using used oil.
the white spirits acts as a thinner so doesnt put a strain on your pump and eases the load from your filter also.another problem which can be over looked is the type of gaskets if you have steel gaskets then your going to be safe but the rubber ones or cheaper ones like on rovers (untill they have the head gasket changed) have a tendancy of blowing up (breaking the gasket not actual explosion) id suggest having a look into your car engine and see if they have a tendancy for blowing up using diesel first before adding in another fuel type of any sort.many people run the engines on a mix of diesel and veg oil and especially in the cold will add in like 15-25% diesel to veg oil so it can still start up and it will warm the diesel in the pipes (it can freeze and gloop up in colder weather).
alcohol does work when i say it burns at a hotter temp what i ment to say was the compresion is higher slightly and if you want to go 100% alcohol then you might want to look at converting the timing slightly and maybe even skimming the head and changing some of the pipes to pipes that wont end up breaking down due to alcohol being corrosive.
quite alot of things come off from neat alcohol such as methaol,ethanol,and alcohol so you may want to look into the percentage from the first few batches to see the optimal time to get the fuel you want also the optimal time for just pure alcohol (so you can dilute it with some water and have a merry old christmas) without making yourself go blind
i was speaking to a old guy when i went to belguim the other day and he said he was the guy in the hip flask case 1971 and then we talked about many things and a very interesting thing he said was diesel engines were origionally run on crushed coal (obviously changed some what now but still got me interested)
HH0 does work if you go to smartscarecrow's channel on youtube he does some great things also sirHOAX there are many people on there doing it and many people trying to debunk it another very successful guy from taiwan daniel dingle has managed to make his car run 100% on water electrolosis so it can happen also stanley meyer did it but then went to public turned down 1billion dollers from the arabs and then the day after signing a deal with nasa died of food poisoning
now not saying its a conspiracy just saying like it is.