Harviestoun's Old Engine Oil Porter

Old Engine Oil Porter apparently reminded Harviestoun's original brewer of the engine oil he was familiar with having worked for Ford.

One of those times bitterness is satisfying rather than repulsive. A little goes a long way I suspect, hence perhaps the 330ml size. 

Generally I like Harviestoun's beers and this is an enjoyable addition to their stable. It has a very slightly scouring aftertaste which I normally dislike but in this case it is pleasingly like dark chocolate . 

Powerful - I wonder how much knowledge of the percentage of alcohol affects perception of strength. There is a general placebo effect of belieiving something is alcoholic leading to intoxicated behaviour even if, in fact, no alcohol is present.