Look in the owners manual. It will tell you what fluid to use in your transmission. Thats why they call it an owners manual. If you don't have a manual, then ask any guy standing behind the counter at any auto parts store. That's why he stands there....waiting......for you.....to ask. "Quality" has nothing do with it and neither does "cheap". It is what it is and it costs what it costs". Any price difference you can find for the same fluid specified for your Mazda will be no more than pocket change.
The dealer of the car for the correct, best transmission fluid.
Auto Zone for the cheapest incorrect fluid.
Use the manufacturer transmission fluid, if not available ask Mazda themselves what fluid you should put in it.
Walmart, Target or Pep Boys. Check your owners manual for the proper requirements and then read the labels to make sure you are buying the proper formula. Good Luck
Wal Mart
Any brand as long as it's Mercon V. Do NOT use a "universal fluid".
Supermarket.
Do you want a cheap Ferrari or expensive beater?
Walmart has some cheap "off brands" that will work. Make sure it is compatable with your vehicle.
quality and cheap are antonyms pick one
For a 2009 Mazda 3