It does say to put it in the petrol tank not the intake, or have I been drastically misusing it
"Hi I'm Troy McClure, you might remember me from such fuel additives as, "Turbo Jizz, 50bhp in just one squirt" and my self help programme, "Get confident stupid!".
It is so easy to use, just pour 1 bottle into your fuel tank before filling up with petrol. 1 bottle will treat 40 - 60 litres of petrol. Recommended dosage is one bottle every 2000 miles to keep your fuel system at its best. A week before your MOT, use a bottle of Catalytic Converter Cleaner to help your car pass the emissions test."