The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

When to change transmission fluid on my 2018 CX-5?

0

Angela R. · rep 0 · May 22, 4:52 AM · 1 replies · solved · Question

Vehicle: 2018 Mazda CX-5 Grand Touring

Hey everyone, I've got a 2018 Mazda CX-5 Grand Touring with about 75,000 miles on it. I've been pretty good about oil changes and tire rotations, but I'm starting to wonder about the transmission fluid.

I've heard conflicting things – some say it's 'lifetime' fluid, others say it absolutely needs to be changed. The car still shifts smoothly, but I want to be proactive. What's the general consensus for these Skyactiv transmissions? Should I be looking into a drain and fill, or a full flush? Any advice on what type of fluid to use would be great too!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:52 AM

0

ClearTheCode admin answer:

It's a common misconception that 'lifetime' transmission fluid truly lasts the life of the vehicle without service. While Mazda's Skyactiv transmissions are robust, the fluid still degrades over time and mileage due to heat and friction. For your 2018 Mazda CX-5, especially with 75,000 miles, proactive maintenance is a smart move.

Here's what you should consider:

  1. Check Your Owner's Manual: Always refer to your specific owner's manual for the most accurate maintenance schedule. Mazda typically recommends inspecting the transmission fluid every 30,000 miles or 2 years, and replacing it under 'severe driving conditions' (e.g., heavy towing, frequent short trips, extreme temperatures) around 60,000-75,000 miles. Even if you don't consider your driving 'severe,' 75,000 miles is a good interval for a fluid change.
  2. Drain and Fill vs. Flush: For most DIYers and even many shops, a 'drain and fill' is recommended. This involves draining the fluid from the pan and refilling it, replacing about 40-60% of the total fluid. A full 'flush' (using a machine to force new fluid through the system) can sometimes dislodge debris in older, high-mileage transmissions, potentially causing issues. A series of drain and fills over a few thousand miles is a safer alternative if you want to replace more fluid.
  3. Fluid Type: It is crucial to use the correct fluid. For your Skyactiv transmission, you'll need Mazda ATF FZ. Using any other type can lead to shifting problems and potential transmission damage. Do not substitute with generic multi-vehicle ATFs unless they explicitly state compatibility with Mazda ATF FZ.
  4. When to See a Shop: If you notice any unusual shifting, hesitation, or warning lights (like a 'Check Engine' light accompanied by transmission-related codes such as P0700 - Transmission Control System Malfunction), it's best to have a qualified Mazda technician diagnose the issue before attempting a fluid change. They can also perform a more thorough inspection for leaks or other wear.
Menu

Help & account