Harviestoun Old Engine Oil Black Ale

This is the first I've heard of Harviestoun Brewery. Old Engine Oil is one of the best beers I've ever had. This is some really good stuff and is exactly what I want when I get a dark beer. It even has an A rating on Beer Advocate from both the users with an A- and the site owners with an A+, which is pretty rare from what I've seen.