Engine oil OEM Mazda or Eneos

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]

For shits and giggles I switched to ENEOS 5w30 synthetic in my 2 current vehicles and now I'm able to go 5,000 miles between oil changes and while some oil is still consumed, it stays above the "add" line on the dipstick without adding oil between oil changes.

After reading several posts I got the Mazda Molly and Personally really like it! With the Molly it seems to run much quieter not such a heavy tick and just overall feels better’

I run 5w-40 in everything. Mazda Skyactiv, Toyota 3UR, Honda J35. They all like it and run quiet.

I bought a Mazda CX-5 dealer test car with 300 Km's on it back in 2015 when I moved up to Osaka. I drive a LOT and was getting the oil changed roughly every 5000 km's per Mazda's recommendation.

I use Mazda's weight recommendation for my environment, as illustrated in your owners manual. I use 10W-30 and 15W-40 Full-Synthetic oils with zinc additives to stave off carbon deposits.

I use only Eneos 0w20.

I normally use Mobil 1, but did experiment with a JDM brand called ENEOS. The engine seemed to run smoother with that engine than other brands I've tried before.

From my personal experience, I used to use Mobil 1 and Pennzoil Ultra Platinum oils, which are really high-quality oils. However, I did notice a big difference when I began using the OEM Mazda oil. I don't know what is so different about it, but my engine runs much more smoothly and very quietly. When I am at a stop light, I don't even feel the engine running, it's gotten that quiet, and I just hit over 100k miles.

I’ve used Shaffer’s and now ENEOS and T6 when it was the in thing and I can’t really tell a huge difference.