welcome to the Club Arnage Le Mans forum
I'd venture Mazda 727B #55 in the '91 race. It had a totally trouble free run Just tyres, pads, fuel and a dash of oil on the last two stops. Explains the outright win over MercBenz, who were faster but had cooling and transmission woes.
Attached pic shows the details
you are right Werner!It was the Bentley in 2003!thank you for your help