I have just bought a 406 (90) hdi, 35k, 3 years old. It is a nice drive, no obvious issues and suprisingly spritely. However, on long motorway runs I am only getting 40 mpg, I was expecting 55-60, and the tech data indicates 62. It is overdue a service.
Any ideas - clogged injectors / air filter - could these impact the mpg as drastically as this, or do I have a real problem?
Many thanks
Gareth
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There's another current thread on exactly this topic ...
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That would be my thread, at least I know I am not alone!
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