Take a look at just a few of the dozens of automatic transmission fluid (ATF) specifications on the market: ATF+4 Mercon V Mercon LV Dexron VI ATF DW-1 ATF T-IV SP-IV Toyota ATF-WS Honda DW (ZF Diamond SP-IV You’ve likely heard the term analysis paralysis.
It depends on your vehicle and driving habits. That’s a cop-out. But, it’s true. Automatic-transmission-fluid-change recommendations vary from one original equipment manufacturer (OEM) to another. Plus, if your driving habits are like most motorists and fall under the “severe” designation (towing, hauling, daily short trips less than 10 miles, etc.), many OEMs recommend changing transmission