FYI - Your manual transmission has its own separate fluid.
I changed my manual transmission oil @ 30,000 miles. I may do 60,000 miles changes in the future. Many forum members are using Redline, because they make the proper oil grade for our Mirage. It's a bit costly, but you only need 2 quarts to do the job (1.7 quarts to be exact). It's an easy job on a manual, & no filter is required.