A thought about weight reduction:
I drive an MR2 Spyder as my fun car. It’s a mid-engine car, and it's also very lightweight at around 2,200lbs. I used to be obsessed with weight reduction, thinking it the best thing one can do to a car to make it faster, but I was wrong.
The MR2 Spyder...
Dad bought me a little Civic for my birthday. It’s my new favorite toy! I take my little Civic everywhere! When Mom takes me to the mall, I take my little Civic and pretend to drive like Mom. Mom drives slow, though. I like it when Dad drives! My little Civic drives fast like Dad!
When Dad...
The official soundtrack to this thread is:
"Relaxing music from Gran Turismo (#1)" by yeeTWOsduck (YOUTUBE LINK)
(Holy smokes, that's a lot of songs!)
Yes, my favorite artists are CAPITALIZED. I recommend you start with them.
Thanks! If you want to know how much money your will be torching if you ever trade up from a Hatch 6MT to a CTR, then read my post "Wise or Unwise: Redux (Running the Numbers)". Numbers are a little dated and for the Si, but close enough.
Mods I (will) regret:
Acuity Pedal Spacer – I hated this. My foot was flexed upwards unnaturally so my shin muscles were always tensed. I couldn’t find a comfortable position and would have probably gotten shin splits or cramps after a few days. The stock throttle position is much more...
Sprint Air Filter + PRL Resonator Delete + PRL 1.5T Silicone Intake Hose Upgrade
I managed to scoop up a Sprint Filter used for $70 from a user on this forum. I haven’t used it too much because the driving season is ending. I’m not going full cold air intake because 1) I like all-motor and...
Wheels and Tires
Enkei TS-5 18x8.5 +38 (Bronze)
Continental DWS06+ 245/40R18
2025 Civic Si stock wheels and tires weigh 52.6 lbs on my scale.
Enkei's & DSW weigh 45.2lbs
~30lbs unsprung weight saved.
After thinking for 2 years what kinds of wheels I wanted, the Enkei TS-5’s were the ultimate...
Rigid Collars
I have mixed feelings about my rigid collars. I can feel the slight stiffness, but now, the car suspension doesn't "float" like it used to (in a good way). I feel bumps more, the car seems to be more sensitive, and the car seems like it picks up bumps on the highway? (this is...
Shifter
Bought in March/April 2025 (two months before the full shifter was announced. No plans on upgrading to Fully Adjustable for another $425 (the spacing is fine, and I don’t need the adjustability, and I don’t want to spend $425 for marginal gains)
Stock Shifter was stiff for first 100...
PRL RMM
Great, highly recommended, for the first 50 miles, I was worried. I could feel the subframe vibrating, giving me essentially a massage in my seat. But it settled down and now feels great.
The stock RMM is very smooth, but gets buzzy above 5,000 rpm. The PRL is slightly buzzy on start...
Cooling (Intercooler & Cool Plate)
Removing the bumper to install this was a pain in the ass, but doable.
3-month out of the year kind of mod here in Michigan, but I haven’t heat soaked yet and I drive aggressively. I don’t notice any extra lag on the street with the PRL intercooler and stock...
Oil Dilution:
We know 10th gen 1.5T engines suffered from this, especially in northern climates. The simple answer is that certain owners did not drive their cars for long enough to evaporate the gas that collects in the engine oil (naturally due to direct injection). Many short trips (think...
Break-In & Oil Changes:
Honda Engineers Have Internal Debates Regarding the Usefulness & Necessity of Break-In Oil Changes
https://www.civicxi.com/forum/threads/asked-a-honda-engineer-about-the-factory-fill-and-whether-there-was-any-benefit-to-keeping-it-in-longer.54128/
BMW Official OEM...
Money Post – 2025 Civic Si
$31,855 – MSRP
$455 – Platinum White Pearl color
$1,150 – destination charge
$1,929.54 – Michigan 6% sales tax
$4,807.96 – Capitalized Interest @ 5.99%
$475 – dealer fees
20% down – conservatively financed
$34,250.54 OTD
I’m the only car guy in the world who doesn’t...
Aesthetics (i.e. customizing my Civic):
I like the debadged look. Every car I own, I have ripped those things off and sometimes even the company logo. My Civic is no exception (with exception to the H Badge).
I applied the Honda black badge in rear and debadged the “CIVIC” and “Si” badges...
Fuel Economy
Normal driving with Michigan 93 is 32mpg, 1mpg above EPA estimates
I get 31mpg when I am more aggressive, and 30 mpg when really hammering it
+40mpg on 100% highway trips on summer gas
I am satisfied with my Civic’s fuel economy.
Why did I buy the Si?
I work in finance, and this is my BWM 3 series replacement. No actually, it’s my Audi S3 replacement. I’m supposed to be in those kinds of cars now that I’m in my mid-30’s, but by the looks of it, I’m a decade behind because all I can afford is a Civic Si. I’m a banker...