Fluid Types
Mercon LV Transmission Fluid: What It Is & Uses
Mercon LV is Ford's low-viscosity automatic transmission fluid used in most modern Fords. Here's what it's for, which vehicles need it, and what not to substitute.
Quick answer
Mercon LV is Ford's low-viscosity automatic transmission fluid, specified for most modern Ford, Lincoln, and Mercury automatics. The 'LV' means low viscosity, which supports efficiency and modern multi-speed transmissions. It is not interchangeable with older Mercon V or with other makers' fluids like Dexron-VI or ATF+4 — always use the exact spec your Ford requires.
Updated July 1, 2026 · 4 min read
Ford drivers will usually see "Mercon LV" on the fluid requirement — here's what that spec is about.
What Mercon LV is
Mercon LV is Ford's low-viscosity automatic transmission fluid. The "LV" stands for low viscosity, which helps efficiency and suits modern multi-speed automatics with tighter tolerances.
Which vehicles use it
Most modern Ford, Lincoln, and Mercury automatics specify Mercon LV. Some newer Fords use an even lower-viscosity spec (Mercon ULV), so confirm your exact requirement in the manual.
Not interchangeable with Mercon V
Despite the similar name, Mercon LV is not the same as the older Mercon V and they should not be swapped. Viscosity differences can cause shifting problems.
Don't substitute across brands
Mercon LV is a Ford spec. Vehicles calling for Dexron-VI (GM) or ATF+4 (Chrysler) need those fluids instead. For the full picture, see types explained, and if you're topping up with a different bottle, read can you mix fluid?.
Frequently asked questions
What cars use Mercon LV?+
Most modern Ford, Lincoln, and Mercury vehicles with automatic transmissions specify Mercon LV. Check your owner's manual or dipstick, as some Fords use other specs (for example certain models use Mercon ULV).
Is Mercon LV the same as Mercon V?+
No. Mercon LV is a low-viscosity fluid and is not interchangeable with the older Mercon V. Using the wrong one can cause shifting problems, so match the exact spec your vehicle calls for.
Can I use Dexron-VI instead of Mercon LV?+
Not unless your vehicle explicitly approves it. They are different specifications tuned to different transmissions. Use the fluid your manufacturer specifies to avoid shudder or damage.
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