Mazda 3 Owner's Manual page 571

Engine oil viscosity, or thickness, has an effect on fuel economy and cold-weather operation
(starting and oil ow).
Low-viscosity engine oils can provide improved fuel economy and cold-weather
performance.
When choosing an oil, consider the temperature range your vehicle will operate in before
the next oil change.
Then select the recommended viscosity from the chart.
Using oils of viscosity besides those recommended for speci c temperature ranges
could result in engine damage.
(SKYACTIV-D 1.5 and SKYACTIV-D 2.2)
SKYACTIV-D 1.5 and SKYACTIV-D 2.2 use speci ed oil. Please con rm the
speci cation in owner's manual. If engine oil other than the speci ed oil is used,
the Diesel Particulate Filter effective period of use will be shortened or the Diesel
Particulate Filter may be damaged.
CAUTION
Maintenance and Care
Owner Maintenance
6–25