Engine oil OEM Mazda or OEM Audi

For [Naturally-Aspirated Skyactiv engines](https://en.wikipedia.org/wiki/SkyActiv), it is highly recommended that you use Mazda's own(Idemitsu) high molly GF-5 0w-20. [Arguably it is one of the best oil for skyactiv engines](http://www.cleanmpg.com/community/index.php?threads/45295/#post-357910).

I always buy OEM oil from dealer and then get it done at the shop or do it my self sometimes. Just prefer that way cuz I care way too much.

Ive been using 5w40 for 100k miles and my engine is happy as can be. It actually is noticeably smoother with thicker weight

For [Naturally-Aspirated Skyactiv engines](https://en.wikipedia.org/wiki/SkyActiv), it is highly recommended that you use Mazda's own(Idemitsu) high molly GF-5 0w-20. [Arguably it is one of the best oil for skyactiv engines](http://www.cleanmpg.com/community/index.php?threads/45295/#post-357910).

Mazda says every 7500 miles for normal duty OCI, and I’ve done every 7500 miles since brand new on my 2014 3z.

It’s now at 187k flawless miles, consumes no oil *at all* (I’ve literally never had to add oil beaten changes, ever, what goes in comes out every time), runs like new, seems easily headed to 250k.

I tested it myself on my 3.0T, pumped everything out with the extractor, then jacked the car up and pulled the plug, catching evening that drained out in a measuring cup. It had less than 1/4 cup of oil left in the pan.

Did this every oil change on my sq5. Made it 180k miles before trading it in. Works very well. That was the easiest oil change I’ve ever done. Of the 15 minutes the job takes, about 4 of those minutes is actually doing something

I have a C7 3.0T A6. I put about 2 quarts of oil in it in between oil changes depending on how hard i drive. I don't have a check engine light. The engine doesn't knock, it runs fine.

I do this on my Q5, I started using like half a quart of cheap new sacrificial oil to mix up the bottom of the pan and extract as much black oil as possible. I almost had an issue with the extractor tube getting stuck in the engine l, but I was able to get it out with a bit of force

2015 Audi A3, new to me a year ago. One quart every 400 miles. First car I've ever owned that consumed this much oil. It's a nightmare!