Acura to admit J37 oil consumption problem? - Acura MDX Forum : Acura MDX SUV Forums
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post #1 of 85 (permalink) Old 10-12-2016, 03:45 PM Thread Starter
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Acura to admit J37 oil consumption problem?

Is Honda/Acura ready to own up to the oil consumption problem with J37 engine? A copy of the article below, original document attached.

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Acura Tech Line Summary Article
July 2016 BTS 160705 Version 1
Engine Oil Consumption
AFFECTED VEHICLES
2010−13 MDX, 2011−12 RL, 2010−14 TL, and 2010−13 ZDX
Engine oil consumption may be exceeding client expectations. If you get a vehicle in for an oil consumption concern, be sure to run an oil consumption test using the Engine Oil Consumption Test job aid in SIS.
We anticipate a service bulletin with complete troubleshooting and repair info in the near future. In the meantime, contact Tech Line if you need any help with troubleshooting. And if the vehicle is out of warranty, be sure to contact your DPSM for possible goodwill consideration.
2016 American Honda Motor Co., Inc. All Rights Reserved

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File Type: pdf J37_Oil_Consumption.pdf (31.2 KB, 406 views)
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post #2 of 85 (permalink) Old 10-12-2016, 05:25 PM
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This finally put to rest the concern of some folks about the 07-09 consuming oil, AFAIK it has always been the 10 to 13 but some users claimed the 07 to 09 were equally affected.

Its sad because the 6 speedo is really appealing but by no means worth it If the engine is dead on water.

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post #3 of 85 (permalink) Old 10-12-2016, 06:30 PM
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It will be interesting to see what the TSB recommends as a fix and if they stick to their typical claim that anything less than 1qt per 1,000 miles is normal. I'm not sure I've seen anyone's consumption get to that point around here.

I'm about to cross 90k miles and still not using any oil between changes. I run the MID to 0% using synthetic which is usually an interval of 9k-10k miles.
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post #4 of 85 (permalink) Old 10-12-2016, 08:13 PM Thread Starter
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There are rumors about batch of defective rings or rings were installed incorrectly. There are folks who had lower block replaced (TLX) said they were told that Honda had revised the piston rings for the J37.
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post #5 of 85 (permalink) Old 10-13-2016, 09:59 AM
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In some cases, the Alusil lining expands at different rates at low temps. This difference in expansion rates is what can contribute to cylinder scoring leading to oil loss. Couple that to owners that have only used Dino oil and the effect could be exasperated during these conditions.

Why doesn't this happen to all engines then? It would depend on how tight or loose the piston rings were adjusted to during install. Having looser piston rings could reduce the occurance of cylinder scoring during the different expansion but then you have other factors that may affect overall QC and intended specs of the engine.

These were observations based on other Alusil based engines but the j37 could also fall into this camp.
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post #6 of 85 (permalink) Old 10-13-2016, 10:42 AM
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Has anyone gone through the dealership diag process and had their motor replaced goodwill?

Also, I'm assuming since it's piston ring / cylinder wall related, there's no easy repair process but has there been any follow up since the July 16 bulletin?

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post #7 of 85 (permalink) Old 10-13-2016, 10:51 AM
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I wonder what is the magic oil consumption number that would result in repair of the J37?

I've been holding steady at no more than 3/4 of quart of syn oil to stay atleast halfway above fill/full line on the dipstick every 8000-8500 mile oil change interval. I could be at around 1 to 1 1/4 quarts if I topped it off to the full line between oil changes.

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post #8 of 85 (permalink) Old 10-13-2016, 12:49 PM Thread Starter
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Originally Posted by zero2sixtyZ View Post
Has anyone gone through the dealership diag process and had their motor replaced goodwill?

Also, I'm assuming since it's piston ring / cylinder wall related, there's no easy repair process but has there been any follow up since the July 16 bulletin?
Has there been follow up since July 2016? One has to talk to the dealer to find out. It's probably an NDA in place between dealers and Honda/Acura NA.

I went to the dealer around this time frame about oil being on the spark plug threads and briefly mentioned oil consumption issue, the service manager told me to drive until the next OCI and come back to him to see how much oil had been consumed. I never went back. I'm currently at 5/8 oil loss at 1600 miles with 5w30 (1/4 - 1/3 loss using 5w20 @ 700 miles). Here's the dilemma, if the oil consumption is due to defective rings, I don't have $6000+ laying around to fix it since my 11 MDX is already 10K over the powertrain warranty. Goodwill? Highly doubted in my case since I don't do oil change at the dealer nor buy the car from them.

There are some 10-13 MDXes do not consume oil at all. I've seen 10-13 Adv parked next to my work place, the tailpipe is prestine shiny stainless steel, not even a speck of black spot. Mine is black soot residue.
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post #9 of 85 (permalink) Old 10-18-2016, 01:12 PM
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I owned my 08 since new and it is now at 93K miles. No oil consumption at all as far as I can tell. I use synthetic oil only.

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post #10 of 85 (permalink) Old 10-18-2016, 02:10 PM
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I owned my 08 since new and it is now at 93K miles. No oil consumption at all as far as I can tell. I use synthetic oil only.
It's because you don't have the Alusil based cylinders that are found on '10+ models.

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post #11 of 85 (permalink) Old 10-18-2016, 09:07 PM
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been awhile since ive visited and this thread peaked my interest -- I have a 2011 Adv and haven't noticed any unusual oil consumption. MID usually accurate with 8500-10k with full synthetic.

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post #12 of 85 (permalink) Old 10-18-2016, 09:18 PM
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It's because you don't have the Alusil based cylinders that are found on '10+ models.
Man, you have to stop that... 07-13 They are all same cylinder coating. THEY ARE ALL NIKASIL!!!! THEY ARE ALL ALSi25CU4Mg.
ALL J37 Engines same bored aluminum.

For your information file attached.
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File Type: pdf Acura_3.7L_block (1).pdf (4.29 MB, 323 views)

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post #13 of 85 (permalink) Old 10-18-2016, 09:45 PM
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^ That was a good read...
I wonder what makes it consume oil then?

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post #14 of 85 (permalink) Old 10-18-2016, 09:50 PM
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^ That was a good read...
I wonder what makes it consume oil then?
I have my guesses, but is only guesses. I don't want to spread anything I don't know...

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post #15 of 85 (permalink) Old 10-18-2016, 10:07 PM
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Well its not like they do not consume oil hahaha and Honda wont ever tell us why though, so your guess is as good as any...

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