Here is my story:
I bought my 2012 Civic Si in November 2011 (Canada) VIN 2HGFB6E...H200###. I first noticed an issue with oil useage when I got back from a highway trip and checked the oil for the first time at 4500km, the oil was at the bottom dipstick mark I topped it off (1L) hoping this was not going to be a recurring issue, and that it was just breaking in still. This was not the case and my dealership eventually started an oil consumption test. The consumption test took a while because of an issue with blown oil seals in the middle of the tests, them F'ing up the readings and them starting over again. But eventually it was completed and the results were sent to Honda Canada.
By my calculation it was consuming 0.6L/1500km, so it was within acceptable range(for them), being below the allowable 1L/1500km.
About 2 weeks later I got a call from the Honda Service Adviser informing me the results were in from Honda Canada and because it falls within the acceptable allowance, no further action required. The adviser told me if I had any questions to go the the Honda Canada website and contact them. I told the adviser I was not impressed and that they were not taking me seriously, and felt they were just dismissing my concerns as irrelevant.
I called Honda Canada, and talked to a rep who again said there is no issue with my car, and it's oil consumption was acceptable. I got mad, ranted at him for about 5 minutes and asked for further investigation, he then asked if the Service Manager had sent this to tech yet? I had no idea what this meant and said no, the rep suggested he would call the Service Manager and see what else could be done, and call me back right away. He called me back within half an hour, and said the Service Manager will now send my issue to tech for review, and he then mentions that my VIN number is on the list for piston and ring replacement. I was flabbergasted that they would keep giving me the run-around, and then finally admit that my car was on this list.
Within 2 weeks the dealer calls me, still not the Service Manager but a Customer Service rep, and says that they will perform the TSB# A-10-12 and replace the rings and pistons, I was hesitant at first but he assured me they have done this on V6's before, but not on an Si.
I agreed, and at the beginning of Feb. 2015 they performed the TSB. The rep at the dealer was nice in that he kept me up to date after they pulled the engine apart, and informed of the condition of the cylinder walls along with pictures, I had asked him for pictures of the pistons and head after it was removed.
Currently I am still in the break in period (he suggested 6000km) I have 3000 km on it and have been slowly pushing it harder after it hit 2000km, but still pacing myself. The oil is still at top of dipstick, has not budged and clean. 1500 km of this was highway driving but before this my past 4 highway trips of this distance always used more than half a litre.
At this time I am satisfied with the results, as all I wanted was realistic oil consumption. As I do understand with a high compression engine like this, and the thin oil they use, 0W20 there may be some consumption.
both done. My car was smoking like hell when the oil pan wasn't tapped, PRL motorsports routed it through the oil drain plug... tapped and smoking stopped. I'm also running open breather for the PCV to catch can. Both areas breath to catch can.
