What grade oil do you prefer?

[banjos-n-beer]

I know it comes with 0W-20 in USA, but I am thinking of switching to 5W-30 at the 5,000 mile oil change interval. An oil change video on YouTube by a Mazda tech on a CX90 convinced me it’s probably the correct path to go. I also used 5W-30 in my QX70 with good results.

Thoughts?

 

[Boland01]

We live in Houston so 95% of the year it's hot. My next oil change I'm going to use 5W-30. I saw that same You Tube video and it convinced me to try it.

 

[BoomerZoomr]

I normally always follow the owner's manual where an engine is concerned. I don’t care for this trend towards 0W oils, but would probably follow the manual's recommendations. I don’t know enough about the design of these engines to deviate from the suggested oil. I would definitely use a quality full synthetic oil. Luckily, both my Mazdas use 5W-30.

 

[Mazdiod2]

I'm pretty sure the type, brand, and formulation are all important things to consider over the basic grade to use, either 0w20 or 5w30, which are pretty close.

 

[SparkYellow]

Thought this was the clip but dude didn't say much about why he went with 5w30.

I used 5w30 in my CX-3 once or twice and noticed no difference. What are the benefits for Skyactiv engines? For two of my other cars, thicker is recommended for the summer (20w50/10w40, 5w40/5w30) and for their oil-burning tendencies.

 

[banjos-n-beer]

This is the video. He talks about how Mazda mandated 5W-30 in all turbo engines. They only recommend 0W-20 if it has Moly. My local Mazda dealer buys 0W-20 in bulk and its not the same thing. When I asked them about 0W-20 with Moly years ago after I bought my 2016 CX5 they had no idea what I was talking about. That didn’t inspire confidence. He talks about oil grades near the end of the video.