I've searched through the search bar/ forums and couldn't find what I was looking for.
My car has reached 40K and I would like to keep going to 200K.
Does anyone do additional maintenance work on their car besides general items; oil change, rotate tires, check fluids, change filters and etc.? If you do, what do you do and products?
I have been looking into gumout and redline for engine.

 

My wife's 07 has around 230K miles on it (granted, it's all highway though), and the only thing I've done that's over and above wear and tear and regularly scheduled maintenance (per the MM), is change the ATF a little more often than recommended. The car still runs and drives excellent.

 

At 40k, your engine is still a baby. Gum out is nothing but fancy snake oil. Keep up on regular maintenance and your engine will run forever. Most if the big ticket items for the k24 are scheduled for the 100k maintenance.

 

Here my piston photos after using Redline Fuel System cleaner .

There is no need to use this product less than 100k. Only older vehicles need.
But for the price per bottle, there is no harm doing it also.

My vehicle is 7 years old

1 bottle of SI-1 is 443 ml (15 Fl.oz)

First 220ml dose into tank at Odometer: 111,753 km
Second 220ml dose into tank at Odometer: 112,480 km

Full narration at Fuel Economy on a Honda R18A: INTERIM RESULTS - Redline Fuel System Cleaner SI-1

 

Wow it made that big of a difference? Impressive.

 

I am looking for a solution. Why is my mileage looking poor?


Since after using the Redline Fuel System cleaner, my mileage has been steadily performing poorly.


As mentioned (from my previous post), I suspect the build up deposits found at the upstream Air-Fuel sensor may have contributed to the poor mileage. Likely incorrect values were transmitted to the vehicle ECU and incorrect amount of fuel output is sent.


Side note - My tool gave way. Hence evaluation of the downstream sensor will be done after acquisition of a new socket removal arriving in a few weeks time.






Aug 20, 2015
I have been off the Redline cleaner for 4 tanks now.




I am happy with the cleaning results but not in the department of fuel economy.
After 7 tanks later, i decided to crack open the Air-Fuel AF sensor (again) to clean.








I took the AF sensor and dipped into strong acid for a few seconds each time and flushed well with water. Thereafter, shop air was used to dry the probe area. The acid removed the white residuals beautifully.






Here is the sensor after 1 day of use.




A new coat of copper slip was placed onto the thread and installed, everytime.




The sensor was working, verified using the OBD scanner after the warm up, about 10 minutes into the drive.


The trip computer reported fuel consumption steadily improved starting at 11 kpl to 12.4 kpl after 30 minutes of driving 24+ km. On the second day, the trip computer reported an increase to 12.9 kpl


Cleaning one sensor at a time will reveal the impact of individual sensor and their effect to fuel economy.




Expectation from cleaning AF sensor: If the fuel consumption does improve, then i can confidently say that the additive or dislodged deposits did clog up the sensor probe.

No doubt, the Redline Fuel System Cleaner does its job well at cleaning. However the sensor probe residual must be removed to restore the performance after usage of additives, even when label says it is sensor safe.

 

I feel like I got a better mileage after I have used the gumout products...

Maybe it's a placebo effect but I did feel the difference somehow..

I used to get around 23 mpg with 70 city and 30 hw... but afterward, 24.9mpg with similar driving habit and 70/30

 

Because additives are snake oil and are completely unnecessary when using the proper gas with adequate detergents...





All perceived benefits are placebo and as reliable as the butt dyno

 

Results from cleaning Air-Fuel sensor

Fuel Economy on a Honda R18A: Results after Air Fuel sensor cleaning

In the last post, the Air-Fuel sensor had white deposits on its probe.

I had them cleaned. The mileage has improved tremendously.

You can find the previous article here:
Fuel Economy on a Honda R18A: Reversing a downward trend, after using Redline Fuel System Cleaner


Expectation from cleaning AF sensor: If the fuel consumption does improve, then i can confidently say that the additive or dislodged deposits did clog up the sensor probe.

No doubt, the Redline Fuel System Cleaner does its job well at cleaning. However the sensor probe residual must be removed to restore the performance after usage of additives, even when label says it is sensor safe.

The reported mileage from the trip computer crept upwards, first from 11 kpl till 13.7 kpl (today).




I still have a bar left of fuel. Surpassing 632.4 km (Jun 29 record) for this tank should be fairly doable.

Hence, clearing the air-fuel sensor did yield positive results

It also meant that additive deposits can be removed from the sensors with success.