VW Diesel Car NOx Emissions Cheating


So VW Diesel NOx emissions are 40x higher on real road tests than on standard emissions test.  VW installed cheating software when they could not easily fix it.

What Causes High NO (NOx)?  Nitrous Oxide or NO is created when an engine’s combustion chamber temperature reaches over 2500F.

Solutions on how to lower NOx emissions:

1. Urea (CH4N2O) Injection.

This solution clears exhaust gases after fuel burn in the engine.  What is the cost? Probably $5K+ according to this article.


2. Hydrogen (NH3 + H2O) Injection.

What about making it burn just a little cleaner?  Probably this DIY will work.

3. Water Fog (H2O) Injection.

What about just lowering the engine temperature by using water fog/droplets to absorb the heat?  Probably this will work, too.

4. A combination of #2 and #3.  Probably. But if it works it is still a lot cheaper than $5K+ urea injection.

5. Software fix.  Update the A/F map and algorithm.  This might lower performance ratings.

For those who have home garage lab mentalities – experiment on!

Premium vs Regular Gasoline: Glaring Differences You May not Notice

reg_premiun_gasolineLately, with low gas prices I started consistently using premium gasoline (93 octane) from regular gasoline (87 octane).  Also, I deactivated the Green Fuel Booster.

The data captured shows some interesting graphs.

Here are the three variables that seemed to co-relate.

Torque – which simply is the pulling or pushing power of the engine.
Carbon emissions – in grams per kilometer.
Fuel efficiency – in Miles Per Gallon.

Using regular gasoline caused relatively bad carbon emissions of up to 250 grams per kilometer.
Using premium gasoline dropped carbon emissions by approximately 100 grams per kilometer.

Using regular gasoline gives relatively low torque.
Using premium gasoline dramatically increases torque.

A drop in carbon emissions has a negligible increase in fuel efficiency.

An increase in torque also has a negligible increase in fuel efficiency.
If you are like me, who drives carefully like a parent with kids in the back seat, then, I do not need all that torque.

Simply  tapering the air intake after the MAF sensor will probably force the injectors to lower fuel use, therefore, increasing MPG.

The Trusted Mechanic: A Driver of Economic Productivity

With the average American worker income going down

and jobs going part time


it is understandable that the average age  of cars on the roads is getting up there, 11+ years


and auto loans are going sub-prime.


With these realities driving a “reliable car” to work to earn a living is a “must”.  Less car downtime means better income. That means most workers depend on their auto mechanic.  That means auto mechanics are not just simply auto mechanics.  Auto mechanics are an important driver of economic productivity.

One level above an auto mechanic  is  a “Trusted” Auto Mechanic.  The difference is transparency.  With 1996 or newer models cars have sensors all over it  a “Trusted” Auto Mechanic shows the car owner why a certain maintenance job needs to be done and explains how it affects car using that data.


Trust-worthiness is not a label one can slap on ones shop.  Trust is earned via transparency.


A Reason to Tell your Boss Why You need to Work from Home

If that is an option …

Driving home from office today compared to yesterday shows something interesting.  Today, the ambient air temperature was generally around the 30+ degrees.  Yesterday’s ambient air temperature was around the 70+ degrees.

The glaring difference is that the carbon emissions is relatively higher when ambient air temperature is lower.   That means it is better to minimize driving in cold weather.  That would be a reason to tell my boss that I need to work from home on those days :)

Cold day:

Warm day:

Why I Don’t Like the 32 psi Tire Pressure

I have been used to driving around with 38-40 psi tire pressure since I got my 2012 Kia Rio SX.  It came with the default Hankook tires  with a max value of 44 psi.  Lately, I got new Michelin tires installed by COSTCO.  I did not realize the technician set all tires to the standard 32 psi.  Most dealerships and repair shops set car tires to this value.
And this is what I got on the CO2 emissions graph – a spike up.  So I set it back to 38 psi  and the values trended down again.