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.
Valvoline Advanced with black Wix filter!
Valvoline 5w-30 full synthetic for good cold starts in winter and a royal purple oil filter for good small particle filtration.
Use either IDEMITSU Rotary oil or Valvoline Racing Oil.
Valvoline seems to be the quietest oil.
Valvoline oil and an STP filter. Good price and convenient because its at Autozone.
I use Valvoline. I am at 300,000 miles on my 2015.
I use Mazda Moly 0w-20 in our 2014 Skyactiv CX-5.
Thanks - I just ordered 2 5-qt jugs of the 5W40, less than $25 each and free shipping. We use this in my 2016 GSW and my wife's 2007 A4.
I throw valvoline 5w30 euro spec (vw 50700) cause it was cheap on Amazon.
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