Engine oil OEM Toyota or OEM Audi

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 suggest you to use 5W40. I have a Toyota Auris and i change them every 7.500km without filter change and at 15.000 km with filter change. In my city at summer the temperature is about 40°C on summer and I have 257.000 km. I haven't any problems till now. My engine running smooth and never burned oil.

I plan to run Toyota oil in my rav4. In the past, I would have never considered running OEM oil and I would tell most people it's a waste of money to do that. However, I've seen a few reports showing Toyota 0w-16 as having more than 700ppm of molybdenum in it, and it isn't from assembly lube used when putting the engines together.

I run the 5w-40 in my 2004 Audi A8 and both of my power strokes just because it's handy and the diesel grade oil is overall better than the other synthetic I was running in a 0w-40 weight.

Toyota oil is pretty good, actually. Lots of moly and a good additive package for overall protection.