I was watching an episode of Sports Car Revolution on Speed TV this weekend, and they introduced some products from EXP4 Performance. Now I'm as skeptical as the next person when it comes to "miracles in a bottle", but these guys did a dyno test with the additives.

They brought the test vehicle up to temperature and established baseline numbers. Then they put EXP4 Gas N&I in to the fuel tank (and I think EXP4 Oil Enhancer in to the crankcase, but I can't remember). Once the additives were in, they did another pull on the dyno, and the vehicle had a 5% HP gain at the rear wheels. I still don't know if I'd put any of this stuff in my car (I subscribe to Larry Bible's 'hot and often' approach) but it is hard to ignore dyno test numbers.

The website is http://www.exp4additives.com if anyone feels like checking the products out.

Jonathan