Mazda 3 2004 Owner's Manual page 344

How to Use the
Turbocharger
To get the most from it, observe the
following.
1. Change engine oil and filter
according to Scheduled
Maintenance.
Refer to Scheduled Maintenance
(U.S.A., Canada, and Puerto Rico)
on page 9-6.
Refer to Scheduled Maintenance
(Mexico) on page 9-9.
2. Use only recommended engine oil
(page 9-16). Extra additives are
NOT recommended.
Driving
Turbocharger
5-213