20k miles in 6 months on our ‘19 cx5 non-turbo, and on to another oil. This time was Rotella GT 0w20 courtesy of the AZ clearance. Engine seems to really like this oil and idles butter-smooth, like it did on the Zepro 0w20 Moly. So far here's how I'd rank the oils tried in our Mazda (all 0w20, completely subjective and anecdotal):
1. Idemitsu Zepro High Moly & Rotella GT (tie)
2. Valvoline ME & Mazda factory syn non-moly (tie)
3. Castrol Edge black bottle
Next up in a couple months will be QSUD, also courtesy of Autozone
1. Idemitsu Zepro High Moly & Rotella GT (tie)
2. Valvoline ME & Mazda factory syn non-moly (tie)
3. Castrol Edge black bottle
Next up in a couple months will be QSUD, also courtesy of Autozone