Engine oil Castrol or OEM Audi

As someone who lives in Florida, and has a high mileage m54 motor, I only use Castrol 5w40 and 5w30 if I cant find the first option. Runs amazing and daily driven with some abuse lol

Go to wallmart and buy two jugs of Castrol Edge Full Synthetic 5W-30 and then just purchase a couple filters off of FCP Euro.

The 2020 has been great but the engine still clacked and groan albeit nowhere near the 19. With the 0.5 quart of Castrol 5W50 I love the car now! Pickup is great and the engine being pettier seems to help the transmission shift better also.

I don’t drive my car enough to hit any of the reasonable mileage points. I change my oil yearly, roughly around the time it gets inspected. Might be overkill (last year the car moved 2k miles, the year before was 2.4k), but I figure the $80-85 I pay is worth it. My wife’s Q7 will be getting its oil changed every 5k miles. It’s a 3.0T supercharged and they love to eat oil, I’d probably add half the oil back just to make it to 10k.

I do every 5k (2013 S4)

Over here in Germany changing your oil every 3k miles in a normal A4 absolutely tanks your resale value. The only reason to do this frequent oil changes is to hide problems. Personally my car did 30 000km(~20k miles) until 91 000km and then every 15 000km(~10k miles). It's a diesel and almost all longish distance highway trips.

I do 5k/3 months. 3 months usually comes first.

In Canada Audi recommends oil changes ever 15,000km. I always do 10-12,000km because I do city driving. My buddy did every 25,000km on his Mercedes Benz and the thing lasted to 400,000km.

5-6k. It depends on how much you push the car. Hard acceleration and high revs will require more frequent oil changes.

I use Castrol EDGE Fully synthetic oil in my 2013 Mazda 3 skyactiv. It does burn a little but I did not have any issues.