3 ms·
It's not. It has something to do with the catalytic converter needing some amount of unburnt fuel to work properly. But the Volkswagen engines are so efficient
by dingo_bat 10y ago
It's not. It has something to do with the catalytic converter needing some amount of unburnt fuel to work properly. But the Volkswagen engines are so efficient that they burn the fuel too efficiently. So the catalytic converter is unable to perform it's function.