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One Lap of the Web: BMW M4 coupe, 'Fast & Furious 7' and soap box racing

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- We all know the new BMW M3 coupe – ahem, M4 coupe -- is on the horizon for the German brand, but we can only speculate about the new performance car.

Petrol sales '25% lower than 2008'

Petrol sales have plunged in the first half of this year – but diesel sales have risen sharply. Retail petrol sales for the period January to June dipped 5.8% compared with the same period last year, Government figures highlighted by the AA showed. The numbers amount to a fall of 512 million litres.

GMC adds Denali trim and a larger V6 to the Terrain for 2013

The GMC Terrain crossover gets an upscale Denali trim level and a larger, more powerful V6 engine for the 2013 model year, General Motors said on Wednesday. The 2013 Terrain goes on sale this fall. The new V6 displaces 3.6 liters and is rated at 301 hp and 272 lb-ft of torque.