It’s a common misconception amongst car enthusiasts that higher octane = more power. False. Its not black and white. The myth arose because of sportier vehicles requiring higher octane fuels. This is just because their engines are specifically designed to get the most out of them. Without understanding why, a certain section of the car subculture decided that this was because higher octane petrol meant higher power. But look at it this way – double A batteries and triple A batteries do the same exact thing, send power to an electronic device, each device is simply optimized to use one or the other.
Read the full article at …….. http://www.carponents.com/content/240/filling-up-on-gas-knowledge-understanding-the-difference-between-gasoline-octane-grades-240
MGB tips mods and maintenance 