The manufacturer of TerraClean – a product designed to clean internal engine components by removing harmful carbon deposits without the need to dismantle the engine – is to hold its first conference for its growing network of service centres. Randstad says its new television advertising campaign, to be aired across a number of digital and satellite TV channels, will be previewed at the conference. TerraClean claims to increase the miles per gallon of vehicles by between four and 15 per cent, reduce emissions, extend component life and improve petrol and diesel vehicle performance. The product has won an endorsement from TV motoring specialist and star of The Discovery Channel’s ‘Wheeler Dealers’, Edd China.