"Recommended Oil for an 2000 Audi A4"

2000 Audi A4 Front View

I bought an 2000 Audi A4 1.8t it’s got just over 135000 miles on it and was wondering on opinions of what kind of oil to use in it.

Answer: I would recommend Castrol. In the cold months use 10w30 and in the warmer months use 10w40. I would not recommend switching to synthetic at this point due to the mileage as your engine is used to running with standard oil unless the previous owner used it. Switching at high mileage can sometimes cause issues. On a side note these engines were prone to oil sludge buildup and after repair Audi recommended switching to synthetic but most of the sludge issues occurred before this mileage. Be sure to change your oil every 3000 miles with the standard oil and you should be fine assuming no sludge buildup already.