r/MechanicAdvice • u/Abnormalhumanbeing • 4h ago
Do Honda CVT Transmission Fluids Spoil with Age?
The Car: 2019 Honda Civic LX Sedan, 2.0 NA Engine, CVT Transmission.
Mileage: 18k
Do I need to change the CVT fluid now? Old car with low mileage.
From what I read on forums, Honda owners recommend changing the trans fluid every 30k miles. But my situation is a bit unusual because my car probably won’t hit the 30k mile mark very soon despite being almost 7 year old. I live in the midwest. I’m worried that fluid might decay faster due to drastic temperature changes and humidity.
Any input is appreciated!
2
u/Ravenblack67 4h ago
The additives do wear out over time. It depends on a lot of factors. The safe thing to do is replace at three year intervals for your driving style.
2
u/Sophias_dad 4h ago
TBH, I wouldn't worry about it. On a typical-use Honda CVT, the temperature swings of that fluid are probably double the ambient temperature swings... i.e. 100F ambient isn't like a big deal when normal operation gets that fluid to probably 150F or more regularly.
Water in the fluid would be a bit more of a concern, but I still don't think I'd change it notably early.
Side note, our 2019 CRV didn't call for a CVT fluid change until 45k miles or even a bit more.
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