Liqui Moly Top Tec Gear EV 520

Worth knowing

The match with the data sheet of Top Tec ATF 1850 goes beyond the main figures: it also gives 19.3 mm²/s at 40 °C, no more than 10,000 mPa·s Brookfield at -40 °C, a red colour and an instruction to shake before use. Neither document says whether the fluid is the same, and matching figures do not replace the carmaker’s requirement. The difference shows in the list of recommendations: 1850 names, among others, Ford MERCON ULV, Ford WSS-M2C949-A and GM Dexron ULV, while this one lists only Cadillac, Ford and Mazda, with Mazda absent from the application text. The 1850 sheet also names electric differential drives, in various Cadillac, Chevrolet, Ford, GMC and Lincoln vehicles.

The make alone is not enough to choose by. Motorcraft’s American table for electric drives assigns MERCON ULV to the rear units of the Mustang Mach-E, F-150 Lightning and E-Transit, and MERCON LV to the front unit of the base Mach-E AWD in the early model years. So the fluid name in the vehicle’s documentation decides. Top Tec Gear EV 510 from the same line is no guide: it is ISO VG 150 with 21.3 mm²/s at 100 °C.