Since the E-85 is considerably cheaper, the question arises also in view of the increasing gas station density whether the A8 can also tolerate this fuel. Does anyone know an answer?
P.S.
All of these vehicles have an electronically controlled injection system with a controlled catalyst (lambda control), which should be able to operate around approx. 10% lower calorific value of the petrol ethanol mixture.
You can have the Lambda control checked on your vehicle with the help of an OBD tool. The correction values should not reach the maximum values in the partial load range and the Lambda voltage should not fall below 800 mV in the full load range, unless the manufacturer specifies any other values.If you have fuelled too high an ethanol content, then the control limits of your motor control would be exceeded and an error would be generated by the motor control system in almost all modern injection systems (MPI). Lambda to long lean). If this error occurs permanently, then your engine control lamp (check engine) starts to light up. When accelerating, you would detect a slight jerking of the engine and feel a loss of power. Simply fill in petrol and the error is fixed immediately.
Edited by Friedrich
