Audi recommends 5W-40 oil in the US.
The oil must be VW 502 and API SL
Other viscosities allowed are 5W-30 or 0w-40.... and only if 5W -40 not available.
I year / 10000 miles fixed interval.
Castrol Syntec is used by Audi USA.
The oil used in RS4s outside the USA ( UK /Australia) is a vw 504 spec oil. This only comes in 5w-30 weight. Australia has fixed service intervals, UK variable. Australia does not need to meet Euro 4 emission standards.
The Castrol oil used by dealers in UK and Australia is VW Longlife III vw 504-507. ( Also known as SLX Powerflow Longlife III in Australia and Castrol Edge 5w-30 in the UK). No API rating given as these are Audi specific oils.
It seems that outside the US Audi/VW has tried to rationalize their very complex oil specification guidelines such that (with a couple of exceptions) all Aud/VW cars from the smallest Diesel to the largest most powerful petrol engines use the same oil : VW spec 504/507 5W-30 oil.
I am unsure of the reason why in the US different VW oil specs and viscosities are used. More imporatantly I am unsure if these oils ( VW 502 /5W-40) represent a better choice.
Also confusing is why Australia would not have similar oil recommendations to the US.
What oil would you use?
The oil must be VW 502 and API SL
Other viscosities allowed are 5W-30 or 0w-40.... and only if 5W -40 not available.
I year / 10000 miles fixed interval.
Castrol Syntec is used by Audi USA.
The oil used in RS4s outside the USA ( UK /Australia) is a vw 504 spec oil. This only comes in 5w-30 weight. Australia has fixed service intervals, UK variable. Australia does not need to meet Euro 4 emission standards.
The Castrol oil used by dealers in UK and Australia is VW Longlife III vw 504-507. ( Also known as SLX Powerflow Longlife III in Australia and Castrol Edge 5w-30 in the UK). No API rating given as these are Audi specific oils.
It seems that outside the US Audi/VW has tried to rationalize their very complex oil specification guidelines such that (with a couple of exceptions) all Aud/VW cars from the smallest Diesel to the largest most powerful petrol engines use the same oil : VW spec 504/507 5W-30 oil.
I am unsure of the reason why in the US different VW oil specs and viscosities are used. More imporatantly I am unsure if these oils ( VW 502 /5W-40) represent a better choice.
Also confusing is why Australia would not have similar oil recommendations to the US.
What oil would you use?