The original question was will a diesel engine last longer?? All of the replies have been excellent and well thought out. My thoughts on the original question..if the owner is going to keep the car for 100,000 plus miles comparing the turbo diesel and the naturally aspirated gas that the turbo will go before the gas engine will as far as maintanence. Anything with more moving parts will finally give up first and the turbo whether gas or diesel will go first. As far as reliability the electronics will go first while the engines will be a lot more trouble free. just my opinion.

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2008 E-70 4.8 Titanium Silver Met/Black/Bamboo