Michelin says it has helped nearly 5,000 motorists save fuel this summer as part of its annual Fill Up With Air campaign. The event has been touring the UK since May and shows drivers the importance of keeping tyres at the correct pressure. The tyre giant believes the campaign has reduced the annual CO2 emissions of participating drivers by around 145 tonnes, assuming the 4,753 drive an average of 12,000 miles per annum at 35mpg. These figures suggest those motorists would save more than 12,700 gallons of fuel and around £70,000 on fuel bills in addition to the increased wear and the added costs of replacing incorrectly inflated tyres more frequently.