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Conquering Carbon

Saving Fuel

The SPIER System™ is a proprietary dual induction system that revolutionizes the performance of diesel engines.


The system will work on any modern diesel anywhere in the world and is immediately available at low cost per vehicle compared with other systems.

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Decrease Fuel Consumption

Fuel Usage is reduced by 15%-30%, delivering significant fuel cost savings.

Reduce Harmful Emissions

An improved combustion process reduces harmful greenhouse gases.  Diesel engines with a SPIER System exceed EPA 2027 emission requirements.

Improve Horsepower

The SPIER System uses a patented blended-induction process to deliver beneficial gases, boosting power.

Less Maintenance, More Uptime

Less contamination in critical engine systems means fewer breakdowns, lower maintenance costs and more uptime.

The SPIER System ensures that an abundance of thermally controlled useful gases is delivered to the cylinder inside the cylinders of the engine.  By properly controlling and directing these gases, optimal combustion is achieved. 


Compared to today’s induction process, which is burdened by too many residual contaminants, the SPIER System creates the conditions where nearly complete combustion can occur. The SPIER System is a blended induction process that uses treated exhaust and combines it with inlet air. This process prevents improper mixing of gases, and also eliminates thermal throttling caused by high EGR temperatures.


Research shows that residual oxygen for optimal diesel combustion is approximately 8%. Test results on diesel engines using the SPIER System show an 8% residual oxygen level, which translates into a 15-30% improvement in fuel economy.

No Emission System Alterations

Our system does not change the emission controls or electronics.  Emissions and fuel economy both improve.


Beneficial Gases are Recirculated

Cleansed exhaust is re-used and brought to the cylinders.

Optimal Combustion

Chemistry and new thermodynamics create a uniquely efficient diesel combustion process.


Cleaner Engine/Cleaner Exhaust

Current carbon footprint of combustion is altered to reduce soot contamination of the environment and

to protect the engine from soot damage.

Test Results

Extensive testing has been performed under various highway driving conditions, comparing fuel consumption for trucks with a SPIER System against the same truck without a system installed.  Samples of our test results are below:

Test Results

Headwind Uphill


Wind Direction and Speed:

Headwind 4mph


Cruising Speed: 55mph


Elevation Change: Uphill 311 feet

Results (MPG improvement): 26%



Wind Direction and Speed:

Crosswind 12mph

Cruising Speed: 55mph

Elevation Change: Uphill 238 feet

Load: 7,000 lbs.

Results (MPG improvement): 33%

Partial Headwind


Wind Direction and Speed:

½ Headwind 7mph


Cruising Speed: 65mph


Elevation Change: Uphill 1500 feet


Load: 44,400 lbs.

Results (MPG improvement): 20%

DEF Reduction: 30%

Additional Testing

An Average 26% MPG Benefit Across
All Conditions and Tests

Our results are fully supported by extensive research, proven science and thorough and independent testing.

Extensive testing of the SPIER System demonstrates consistent improvement in fuel savings and horsepower while simultaneously reducing harmful emissions.  Tests have been conducted on both medium and large displacement engines, across multiple grades and terrains, with and without load, and with various wind speeds and wind direction.  Tests have also been performed on multiple engine manufacturers and truck makes and models. In all tests, the SPIER System delivered predictable and consistent improvements when compared to baseline tests (when no SPIER System was installed).

Gas analysis tests were performed in conjunction with the Rochester Institute of Technology (RIT Case Study).  The gas analysis tests confirmed a reduction of residual oxygen at the tailpipe and a reduction of harmful NOx emissions, resulting in an 18% improvement in MPG.  

Benefits & Cost Savings

Improve the Performance and Reliability of your Fleet today. 

Total Fleet Size:

100 Vehicles

Average Distance Driven per Truck:
120,000 miles per year

Average cost for diesel fuel:
3.10 per Gallon

Potential annual fuel savings $1,056,000

Decrease Fuel Consumption

On average, the installation of a SPIER System  decreases fuel consumption by 26%.  Annual fuel costs for a fleet have a significant impact on profitability.  A quick calculation would show  the annual savings your fleet could achieve.

Less Maintenance, More Uptime

The SPIER System has a direct and beneficial impact on Maintenance Costs.  Many costly systems need to be maintained less frequently, including:

  • EGR (Exhaust Gas Recirculation System)

  • DPF Filter Cleaning –  reduced by 25%!

  • DEF and SCR systems are used and maintained less frequently.

  • Other costly repairs, including engine rebuilds, turbocharger failures, and engine fault codes are reduced or eliminated.


Less time in the shop means lower repair bills and more Uptime for your fleet!  

Reduce harmful Emissions

Harmful emissions coming from a diesel engine have many harmful impacts, including negatively impacting our environment, and increasing the maintenance costs related to the equipment on your fleet.  Again in 2028, the environmental Protection Agency has further tightened allowable levels of harmful emissions.  The SPIER System improves the diesel combustion process and reduces harmful emissions.  Vehicles with a SPIER System installed exceed EPA 2027 emission requirements today.

Improve Horsepower

The SPIER System directs beneficial gases to the cylinders of the diesel engine.  Depending on driving conditions and the demand on the engine, the SPIER System optimizes the mix of these beneficial gases and makes the combustion process more efficient, improving horsepower.

Benefits & Cost Savings

Less Maintenance, More Uptime

Every long-haul trucker knows that the longer a diesel engine is running, the more soot builds up from Exhaust Gas Recirculation (EGR) that, eventually, will result in a huge maintenance bill. Unfortunately for drivers and fleet owners, often times this includes a catastrophic engine failure out on the road.  Looking at examples from SPI.Systems Corporation’s testing and tear down of engines after as little as 100,000 miles provides a glimpse of just how damaging soot can be.

Why do we need EGR at all?  Its purpose is to cool the combustion process to help meet emission regulations on oxides of nitrogen, called NOx. However, the soot particles at engine-out going into the EGR system are very sticky and immediately bond to each other, to intake plumbing and cylinder surfaces, and get into the engine oil.  As soot particles thicken the oil, they cause turbocharger seizures and cylinder wear.  The maintenance bill can go as high as $10,000 per year, driven by engine contamination alone, all in order to meet emissions standards.

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Less Maintainence, More Uptime

Clearly, the cost of maintaining diesel engines is significant. Add in Diesel Exhaust Fluid (DEF) pumping and dosing of the final catalyst called Selective Catalytic Reduction (SCR). This final aftertreatment is also necessary to reduce the NOx that EGR misses. Its maintenance cost is also high due to contamination from urea deposits, so now maintenance of the total system becomes extreme, all because of NOx.  What can the trucking industry do about it?

SPI.Systems has been working on reducing the costs of NOx reduction since 2018. Our new method is to attack the problem in two ways:

      A) Reduce the percentage of EGR soot-laden exhaust reentering the engine.

      B) Reduce the need for EGR valve opening by cutting NOx in combustion.

SPI has succeeded in making major improvements in combustion, along with  reductions in soot damage. SPI has measured that success in road testing that included emissions and MPG measurements, along with DEF usage readings.    Here’s what has been achieved with an upfit of the SPIER System on 15-liter engines:

  • Soot generation reductions from enhanced combustion up to 50%.

  • Oxides of Nitrogen (NOx) reductions at engine-out up to 30% = less DEF usage and less EGR.

  • Cleaner engine oil and cylinder walls = reduced engine rework and turbocharger failures, longer oil life.

  • Reduced need for DPF cleaning and longer time between active DPF regenerations.

  • Improved horsepower and grade climbing through more efficient combustion.

  • Reduced DEF system and SCR maintenance.

  • Lower maintenance and downtime costs.

  • MPG improvements of 15-30%.

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DEF Usage, Pulling 45,000 Lbs.


                                                                                     Gals.     Miles     MPG            


to Laramie, Wy.                                                    5.32      773        45.3

to Battle Mtn, NV                                                 5.16       691         133.91

to Ferley, NV                                                          5.5         768        139.64

to Little America, WY                                       4.5         634        140.89

to San Jose, CA and to Colfax, IA               5.15       949         184.27

to Bellwood, PA                                                   6.92       877         126.73     


Avg.                                                                           5.425     782         144.13    SPIER   

                                                                                     37.98     4692      110.71      OEM


                                                                                                                  30.20%  Improvement


Lower DEF usage = reduced EGR soot back into the engine.  At last, there is a way to reduce the impact of “the engine killer.”  


Save Big Money on EGR Engine Damage

Save Big Money on DEF

Improve Fuel Economy

There is a direct relationship between reduction in EGR and improvement in fuel economy, since they are both influenced positively by the enhanced combustion produced by SPIER.  Here’s a road test report by SPI which includes our tracking of both EGR and fuel economy according to the terrain variations on a given route and load.

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Overall Savings Potential with Upfit of SPIER System, as shown above:


Fuel Economy Improvement at 120,000 Miles/yr.                $10,500/truck/yr.

Reduced DEF usage at $3.00/gal.                                                 $973/truck/yr.

Reduced Maintenance                                                                        $11,275/truck/yr.

Improve Fuel Economy
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