- Joined
- Feb 20, 2022
- Messages
- 351
Recently changed out my Mazda6 MT gear oil from stock to Redline 75W80 API GL-4. Original oil was still performing fine, but with a hint of notchiness.
Old fluid drained out fine, slightly brownish color but no particulates that I could tell. Used this tutorial: https://www.mazda6club.com/threads/diy-manual-gearbox-fluid-change.432914/
Slightly better shifting! Notchiness is pretty much gone, and the synchros seem to be working slightly better - a hundred plus miles since the fluid change.
At 140k miles, I figured it was about time. I normally go with Mazda OEM fluids or parts for this type of thing, but very happy with Redline in this use case.
Old fluid drained out fine, slightly brownish color but no particulates that I could tell. Used this tutorial: https://www.mazda6club.com/threads/diy-manual-gearbox-fluid-change.432914/
Slightly better shifting! Notchiness is pretty much gone, and the synchros seem to be working slightly better - a hundred plus miles since the fluid change.
At 140k miles, I figured it was about time. I normally go with Mazda OEM fluids or parts for this type of thing, but very happy with Redline in this use case.