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What's the best cleaning products for diesel engines?

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Should I have the timing belt changed on my 2007 Saab 9-3 Sportwagon?

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Does my Audi TT's cambelt really need replacing?

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Do I need to replace my Mazda 3's DPF?

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How should I make sure my turbocharged engine cools properly when I switch it off?

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Dealer has charged for work it never carried out - what should I do?

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Volvo XC70 suffering engine problems - what's the cause?

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Buying a new Audi on finance with free servicing - is this a good deal?

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