Anyone heard of or used a product called "10k Boost"? It is a decoking product, gets sprayed into the inlet of the car, supposedly cleans out alot of crap. The magazine that tested it put it through a type-44 Audi and supposedly it makes a big difference, but they're still going to keep an eye out for long-term results. Idle improved instantly, along with driveability. Anyone know of the stuff? G.