I've just watched your Volkswagen Polo economy driving video. I recently bought a new Vauxhall Astra ST 1.4 150 T (i.e. same sort of small capacity turbo engine) which I run on Shell Nitro for low end torque and carbon combatting detergents. I am very impressed at it's ability to pull cleanly from low revs, but (especially while running it in) rather worried about letting it slog. Do you know at what revs maximum torque comes in on this engine? How low could I let the revs go to ensure good economy but also a clean pick up.