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Maintenance Interval Questions...

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1.6K views 14 replies 7 participants last post by  mdxstang  
#1 ·
2025 MDX Technology trim

Recently went to dealer for an oil/filter change and tire rotation at 9900 miles. The dealer had a $99 coupon deal for the service (A1, I believe), and I change oil and rotate tires every 5k on all my vehicles (already had the 5k done a few months ago). Went a few miles early on this one as I'm heading out on a long road trip and figured why not. Plus I'm busy and cheap, the coupon expired in a few days, so it made sense.

While at the dealer, I was given what I initially felt was a "hard sell/up sell" on also having the rear differential fluid changed. I knew that it would need an initial change at ~15k (then ~every 30k thereafter) and had them do the change. Exploring the internet and reading the experiences of owners on this thread, 9.9k for the change may have been a bit early, but not necessarily a premature push by the dealer. I'm ok with having had it done.

Dealer- Crown Acura- was great, by the way.

Back home, I dug into the owner's manual (770+ pages) to look for the vehicle maintenance intervals, and other than chapters telling me I should rely on the maintenance indicators, I can't seem to find a table or chart that provides basic time/mileage guidance. I fully understand the concept behind the maintenance reminder system and the algorithms incorporating time, mileage, driving habits, etc, but still like to understand at a basic level what is due for maintenance and approximately when.

For example- as mentioned- my tires get rotated and oil/filter changed every 5k regardless of time or what an indicator will tell me. I drive all 3 of my cars enough that the "time" between events isn't a factor.

For me, cabin and engine air filters are inspected every oil change but generally only replaced every 3rd oil change (unless inspection shows that I need to do something sooner). Brake fluid flushed every 2 years (unless pads and/or rotors replaced, then a flush), coolant checked regularly and replaced every 5, timing belt/water pump towards the 100k mark.

I now know the rear differential needs changing every 30k after the initial change, but couldn't find specific information regarding the transmission and transfer case maintenance requirements other than the fluid types and quantities required.

Since I do most of the maintenance on my 3 cars, I keep a spreadsheet of the different intervals listed in the owner's manuals. Maybe I am missing something, but I can't seem to find that basic information in my MDX manual. (This is my first Acura- other cars are a Miata and a 4Runner)

I'm I looking in the right place? Is there a different resource that I can refer to?
 
#2 · (Edited)
It depends 😀 My 8th Honda product.

My rear diff came up at 10k. My transmission came up at 35k, but I had already done it at 30k.

I do the rear diff every 15k as I drive in snow 6 months of the year and it is engaged. I do the transmission and transfer case every 30k. Cheap insurance on a very expensive part.

Air filter and cabin filter. As DIY person, I check the air filter every oil change and change it about once a year. I average 15k in mileage. Cabin filter much less as I always have the sunroof and windows open. Don't use the AC much.

Brake fluid flush every two years. First set of brakes and rotors at 42k due to warping as a result of mountain driving. Known issue with all Honda type SUVs

Tire rotation every 5-6k

My Honda type vehicles go over 200,000 every time with these intervals....
 
#3 ·
Wait, you been charged for the oil change? Did Acura remove the 2 years/24K miles complimentary oil change / tire rotation?

I think those reminder comes up depends on when the last reset and your driving behavior. On my 3rd GEN, first rear differential popped up somewhere between 16K~17K, second one popped up around 51K~52k. Transmission popped up around 41K.
 
#5 ·
Best to stick to 5-6k miles or once a year for oil. It’s cheap insurance to max engine longevity, 10k oil changes are a real gamble. Diff could have waited to 15k miles. I’d recommend doing transmission and transfer case oil at 30k miles for first than every 45-60k there after. Plugs best around 60k. Also highly recommend only top gas with a Techron additive every 6k or so. it really depends if your severe duty or not. Keep in mind that any substantial heavy city traffic or high heat would put you into severe duty and therefore I’d recommend lower intervals.
 
#7 · (Edited)
Best to stick to 5-6k miles or once a year for oil. It’s cheap insurance to max engine longevity, 10k oil changes are a real gamble. Diff could have waited to 15k miles. I’d recommend doing transmission and transfer case oil at 30k miles for first than every 45-60k there after. Plugs best around 60k. Also highly recommend only top gas with a Techron additive every 6k or so. it really depends if your severe duty or not. Keep in mind that any substantial heavy city traffic or high heat would put you into severe duty and therefore I’d recommend lower intervals.
I follow the MID on my 2014 MDX, same engine as 2025 non-S, and generally change the oil at around 7,500 - 9,000 miles with sometimes earlier and one time later (10K due to being on a road trip). I now have 155K miles on it and all is fine.

I had the plugs changed at 112K miles and the old plugs still looked fine - all normal, matching each other, no oil or carbon, etc.

For road trips I seek out top tier gas but otherwise it's usually non top tier gas from a station at a grocery store chain due to convenience although I do always use premium, which some brands put more additives in. I've never put an additive out of a bottle into the gas tank or crankcase.

And again - it's at 155K miles and doing just fine.
 
#10 ·
We also discovered many dealers and even Costco (who claims they torque) over torque rotors. The problem is the techs get too zealous with the impact gun trying to get the job done as fast as possible and end up using a torque wrench to verify torque as a minimum setting as the lug nuts are already too tight and not a true absolute torque specification. Just went through this on my wife’s car that had warped front rotors and uneven pad wear. Checked the lug torque and they were much higher than they should be thanks to Costco. Also, had another tire shop strip an anti theft lug key on last car as a result of over torquing.

Now I always check torque myself once I get the car home unless someone I know and trust does they job.