civic si

Since December, I have been getting an average of 26 mpg consistently for combined city and hwy driving. My last two trips which were roughly almost 7 hours hwy driving I was averaging 37-38 mpg. On Friday I changed my oil after putting 7K from my last oil change with 20% left on the MM from...

I am in the process of changing my oil, I currently have about 7K (20% remaining on MM) on the current fill which is Idemitsu 0W20. Over the last 7K I have driven hard in very harsh conditions, including 2x 8 hour trips in over 100 F temps at high speeds as well as lots of mixed city/hwy...

I've owned my 2018 Civic Si Since June (8 months), and I notice that temperature does affect performance. I have found that if the temperature is 50 F and above, my car performs much better, everything from acceleration to better gas mileage. For example, yesterday was a nice 55 degrees F, and...

A couple of days ago I read an article on why the manual transmission needs to go. It was pretty fact filled and compelling. The author argued that automatic transmissions were far superior with computer controlled advanced shifting, making modern cars faster, more responsive, and more...

I am sure most of you have read this or this information is old news, but for those of you that are new to the Civic Si, here is a link with technical details of the 2017-2019 Civic Si 1.5L Turbo https://hondanews.com/honda-automobiles/channels/civic-si/releases/honda-civic-si-powertrain I've...

I have been hearing a rattle on cold mornings, especially when I use the defroster. At first I thought it was coming from the left side of the dash where the vents are, but realized it is coming from the drivers side pillar where the side airbag curtains are located. The plastic cover is...

Since I bought my Si last June, I have basically only seen 5 or 6 10th gens other than my own (although I have seen lots of pre-10th gens). Even rarer than that, I have probably only seen three Type R's, and today was an extremely rare site, a female driving a Type R! I was driving next to her...

I am selling my OEM Si shift knob and it is in excellent condition! Send me you offers!

I am selling my 2018 Civic Si steering wheel. It is in excellent condition and was only used for 7000 miles! I am asking for 65 shipped obo.

For the last few months I have been having sort of sluggish performance and very notchy shifting, especially between gears 1-2 and 3-4. No grinding, no lockouts, nothing like that, just sort of a slight hesitation taking off and between shifts. I feel lately that the transmission has not been...

I was driving in 1st gear and the front driver side brake developed a screeching noise, metal on metal contact. I turned the car around to try and get it back home and the problem got even louder after a minute. The problem did not change with or without braking. It couldn't be heard in reverse...

I have been watching my fuel usage over the last few days, and I have been averaging on my daily commute 24.7 mpg, which is a mix of freeway and regular street driving. My driving is mostly normal, no jackrabbit starts or aggressive driving, I don't use a lot of boost etc. This just doesn't seem...

Decided to go a different route with the car so the intake is up for sale. In perfect condition, low miles on this filter. Everything is clean and ready to go! Price: $180 Shipped

Hey guys, Just had a question that I can’t see to find the answer to anywhere online so I thought I’d bounce it off you very knowledgble bunch on here :) I’m looking at modding my Civic RS Sedan (Australian Model) gradually with some bolt on’s (Short Ram Intake, Intercooler, exhaust etc.), and...

I've been having this clicking noise coming from the front passenger side when turning left or right. I took it to the dealer to see what they could find and was told that nothing was found. They had taken it out for a drive and was able to hear the noise. After they looked at the passenger side...

Hi i am looking for any feedback long term on anyone with FX35o clutch with the stock dual mass flywheel on how it is holding up and the feel of it so far for city driving. I am considering this set up as my car only has 14k miles so i am considering running the stock flywheel (unless its...

Greetings from the great white North! - The beautiful country of Canada and more specifically the beautiful province of British Columbia that I and many others call home. This is going to be a page of firsts. This is my first Honda Civic, my first brand new car and the first build page I've...

I am going to be changing my manual trans fluid soon, and I wanted to find out if anyone has had experience using Royal Purple Synchromax Synthetic MT fluid. Let me know your experiences, good or bad

Thinking about buying some new sets of wheels + tires for my 2018 Civic Si. But I have no where else to place my current set if I replace it and I don't want it to collect dust. They currently ran about 7000+ miles. If you're interested please PM me with an offer. Also would prefer local pickup...

I have a 2018 Si sedan with 3500 miles on it and I am in love just one thing, my steering gearbox. I noticed last Monday that there was a small crack on my power steering gearbox is what they said at honda that grew over a few days and left me without a car for a week while parts came in a...