
Well, in 1981 Shell SA took a Passat that has been driven more than 5000km with Shell oil in the engine, and drained the oil

According to the ad the poor old (new at the time) Passat did another 150km (minus the Shell oil) before it 'failed to proceed' (no further mentioning of what happened to the car). Interesting enough, there is no small print stating something like 'Shell SA does not advise driving your Passat without oil' - it only says 'Independently tested'. Those were the days...
