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post #2 of (permalink) Old 3rd March 2011
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Re: Renault Scenic 1.5dCi 106

The main problem is that its not Renault who have made these claims for the fuel consumption - its the government when establishing what your car's CO2 emissions are. Manufacturers would love to submit their own figures, I'm sure.

The cars are not tested on the road - they are on a simulator (rolling road), and the 'driver' merely follows the pre-set commands for speed achieved & distance travelled.

So factors like road surface variation, wind resistance, ancillaries & accesories fitted & used don't enter the equation - neither of course can it allow for congestion or different driving styles.

I'm not of course saying that this in itself can explain the differential (there may well be a fault), but the figures are really only for comparative purposes between makes & models - not claiming what should be achieveable.

Can your retailer provide another car of similar engine & transmission so you can carry out a 'back to back' comparison? This would confirm whether a 'fault' needs investigation - or 'they all do that sir'.

At least you would know where any 'issue' lies.



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