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Fluids - Follow Maintenance Minder or Dealer?

4.7K views 10 replies 8 participants last post by  SVTfocusO3  
#1 ·
A few weeks ago I took my 2017 EX-L AWD to the dealer for an oil change (MM came on at the 15% as expected and threw A1 code). Had it done and tires rotated since it had been about 8,000 miles since last time.

They also indicated that I should also do the coolant flush, transmission fluid, and rear diff fluids soon (all for $150 a pop). Price aside, I'm wondering did they actually check the fluids or just going off the miles and age? The car is 5 1/2 years old now and only 48,000 miles total (low annual miles in recent years thanks to pandemic and it being mainly my kids' car now and they are off at college with the car at home).

I did the rear diff fluid at 18K miles 4 years ago and the trans fluid just back at 35K miles 2 years ago (both at the same dealer). Coolant though I have never changed. But I question if they even inspected the fluids or are just going off the old maintenance books per mileage.

What do you think? Doesn't it seem too soon for the rear diff and trans fluids? Should I just trust the MM as I always have? Thanks!
 
#7 ·
So, the final answer is:



Take any recommendations for 'extra' dealer services (not indicated by the MM) with a grain of salt.

Politely decline those services and ask here. Lots of experience from members.

Asking here is important. Especially if you have the car serviced at an independent shop. They may do a service and reset the MM's other functions...THAT is no good.
 
#11 · (Edited)
Main thing, its hydroscopic, it absorbs water. Water has lower boiling point than that of fluid. Once it boils, creates air, air is bad, brakes may feel spongy or fail.

Also, water will will increase the TAN, which causes other problems with components.

Your accord, probably did not get hot enough to boil, so no issues noticed. Will it boil... you assume the risk.

Now, their are some tricks with a multi-meter to check fluids in a car, but that's complicated.