[dghughes]

That reminds me of Star Trek TNG Geordi boosted the engine efficiency 1% or so.

Data asked why he is working on the engines Geordi says the engineer on another starship had his engines at something like 95%.

Then Geordi asks the computer for an update on the Enterprise's warp engine and the computer replies the engine efficiency increased a bit due to his changes.

http://memory-alpha.wikia.com/wiki/Force_of_Nature_(episode)