Quote:
Originally Posted by Rodge
With small direct injection petrol engines becoming more and more efficient, (e.g. the new BMW328 twin-scoll turbo 2.0 petrol buring just 6.3 L/100 km's while still providing strong performance), when you factor in the extra regular service costs associated with a diesel and all the potential deep cycle service / replacement costs, you've got to wonder if Euro 5 and Euro 6 reg's are effectivly the nail in the coffin that ruins diesel's long held efficiency advantage ?
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Many manufacturers are having problems with carbon deposits on intake valves with DI engines, so that is not an automatic solution. Normally the spray of petrol onto the back of the valve would prevent the deposits occurring.