I have to change the oil on a recently aquired P12 2.0l petrol.
The manual specifies almost every combination of 0W20, 0W30, 5W30, 10W40, 20W50 you can think of. However, there is no mention of 5W40.
I have a lot of quality 5W40 oil available from a previous vehicle and wondered if this would be OK?
I cannot think why it would be bad but am open to other peoples thoughts on whether 5W40 fully synthetic A3/A4/B3/B4 SLJ would not be OK?
Q.
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