Originally Posted by HighlandPete
The test, here in the UK, was switching fuel only. Can't see what else is coming into play except the fuel itself, and the ECU adapting to the knock rate. OK, the fuel additive package could be different, as it often is across brands, but the HP change is from switching fuel and octane rating. All fuels would have been to the same British Standard.
exactly. they only changed the gasoline and listed the average dyno (rolling road) reading of 3 separate pulls per type of gasoline.
fifth gear won't let us in the US view the vidoes on their website. perhaps someone fromthe UK can post the episode video.