my newest car has a 3.0 V6 its actually the largest engine size I've owned. unless I buy a mustang or a full size truck ill most likely stick with 4 cylinder or V6.
I just fill the V6 up for the first time from E since I've owned the car too.
I've been filling it with 87 octane but I just found out, that although running it on 87 won't hurt it. Its recommended to run it on 91 octane.
After speaking to others on the mazda forums. They recommend filling it with 91 at least once a month.
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