Originally Posted by Lagerlot
wow what an eye opener that article was!! Has anyone heard anything like that about " risoline" I have been using that for a few years now in my vehicles. But I do change the oil between 3000 and 4000 miles. I have also switched to synthetic oil.
Similar tests have shown the same results about Rislone, Marvel Mystery Oil, Gunk et al, while some swear by these additives. Modern day oils are so well constructed (that is, the quality of base oils and additive packages are very good) that additional additives are not necessary. This is especially so if you are using synthetic fluids which are superior lubrications.