2011, 2012, and some 2013 MT Tsx's now have an oil consumption TSB
 

Over a year old but I found this last night. Did an oil change and noticed I had burned about 1.5 quarts over about 4500 miles. Not really worried about it but my engine only has 55K miles. TSB points to engine braking (a basic function of manual) and requiring the piston rings be replaced.

Here is the PDF- https://static.nhtsa.gov/odi/tsbs/20...08422-9340.pdf

From here: https://www.nhtsa.gov/vehicle/2012/A...Communications

Try not engine braking and see if it helps. I never used the transmission to slow the car down unless it was to get traction, like in snow. It's hard on the clutch. Brake pads are cheaper than a new clutch. And I hate the lurch feeling when downshifting to slow the vehicle.

How can you stay in gear but not engine brake? I rarely am past 4k in this car, most of my engine braking is me staying in gear from 3K to 2K. I would be fine with hopping out of gear more often if this darn car didnt have such terrible throttle lag. Very hard to blip the throttle, it usually is a dead pedal or a 100% wot throttle when I try to blip it.

Well, I was referring more to downshifting than just keeping it in gear. It should certainly be designed to keep it in gear when coming to a stop, until slow enough that the engine would start to lug or die altogether of course. I personally would throw my 3G TL in neutral when I anticipated a stop but if the TSX has the throttle lag you describe I can see why you wouldn't prefer that.

Anyway, I find that reasoning by Acura to be kind of dumb. Auto's do the same thing when going downhill in a lower gear. The transmission will stay locked unless you're at a low RPM, since the ECU assumes you're staying in a low gear to engine break, which is exactly what you're doing. I have to do it all the time driving in a mountainous area like Utah unless I want to fry my brakes, and I have zero oil consumption.

Any data on how Acura handles TSB's? I know they are not a recall and the dealer has zero obligation to service for free or at a discount but at less than 60K miles I expect the problem to get worse at 120K. I see there are two new recalls for airbags, going to check my vin a bit later. Might have a need to visit the dealer anyway.

OK sorry but learned something new today from that TSB. Different sized pistons in the K24? Why?

From page 16

Every engine has some combination of A- and B-sized

pistons. You can determine the sizes and their

locations in the block by inspecting the markings on the

timing chain end of the engine block or by looking at

the pistons.

a proper tune with remapped throttle table will take care of that

I have a 2011 wagon with 124k-ish miles and of course it is an automatic. I can confirm that I do burn oil as well and I use my transmission to downshift on a regular basis. I doubt I will repair anything as long as it does not get any worse.