Engine oil
http://www.forabodiesonly.com/mopar/showthread.php?t=51840
Please see the thread above for a further discussion of oils and additives.
You guys might check out this site @ Perdue Univ.:
http://www.hort.purdue.edu/newcrop/ncnu02/v5-029.html
Its all about Canola based motor Oil. Its very technical but the short version is a 10% increase in horespower, a huge decrease in emissions and wear, and a good increase in mileage.
I had my father-in-law take a look at the data, he was very impressed and said if it performs like it reads its quite remarkable. By the way his speciality for thirty years was oil additives for EXXON, he was their lead PHd Chemist.
Andrew