Model D50
The heavy-duty diesel enhancer for tanks up to 500 litres — heavy trucks, large fleets and industrial equipment.
Not sure this is your model? Use the product selector →
Model D50 at a glance
| Model | D50 |
| Fuel type | Diesel |
| Tank capacity | Up to 500 litres |
| Package contents | Fuel Enhancer (500 L) × 1 |
| Installation | Drop into the fuel tank. No tools, no engine modification. |
| Activation | Starts working within about 30 minutes of installation |
| Service life | 10 years, no maintenance and no refills |
| Warranty | 12 months with serial-number registration at greentech.tw |
| Best for | Heavy trucks, large fleets and industrial equipment |
| Origin | Designed and manufactured in Taiwan · Taiwan and U.S. invention patents |
In the big-tank world, savings are counted in litres
Gensets, heavy machinery, bulk fuel sites — one unit per 1,000 litres. Simple.
Diesel is your electricity bill; running hours are the burn rate.
Dose by tank volume — the saving shows up on the fuel purchase order.
✓ Ethiopia ECAE official testRun it on my fleet →
Harvesters and excavators thunder through a season of fuel.
On big displacement, even 5% is a big number.
✓ Documented range 5–25%Run it on my fleet →One site, central fuel — you want one treatment, not per-vehicle installs.
One unit per 1,000 litres covers the whole site.
✓ 20 years · 15 countriesRun it on my fleet →🌿 Beyond fuel: for many fleets the main reason to buy is emissions — government bus tests measured smoke down by up to 85%, idle CO cut to zero, 9 of 10 buses passing. Inspections, carbon targets and ESG are where this device fights.
Not your scenario? Truck and bus fleets → D51 · Vessels → Marine
Run the payback on your own fuel bill
India, 4 trucks, 219,793 km (2025–26)
Official rating: diesel up to 10%, gasoline 15–20% — measured higher in heavy-duty markets: Ethiopia official tests +33.6% diesel / +18% gasoline; Qatar heavy truck +34.6%. The more efficient the vehicle, the smaller the % looks — the litres still add up.
🌿 Fuel is only half the story — the emissions gains (smoke down up to 85%, idle CO to zero) carry inspection and ESG value on top.
Do not take our word for it
Government labs, fleet trials, customer letters and patents in six jurisdictions — swipe through; every card links to the source document.
Granted in 6 jurisdictions
Vietnam · USA · Taiwan · South Africa · EU · China
View certificates →11.5% – 24%
Goodwill Autos, India · Kirloskar 45KVA · two sites, 4-month comparison · 2022
Field trials →Diesel +33.6%
Ethiopia ECAE official test · Toyota Hilux · HC −79% · 2022
Official test PDF →Smoke down up to 85%
KSRTC state buses, India · 9 of 10 passed · emissions testing
KSRTC report PDF →ISO 9001 · 14001 · IATF 16949
Made in Taiwan · certified manufacturing
ISO 9001 certificate PDF →Installed in minutes
Drop the enhancer into the fuel tank
Open the fuel cap and drop it in — it sits in the tank for its whole service life.
Drive as usual
Activation begins within about 30 minutes of normal operation.
Run a fleet pilot
For fleets: baseline 3–5 vehicles for four weeks, install, then compare — we provide the pilot protocol.
The same drop-in method applies across vehicle types.
What tests show for heavy diesel
7.4% across a heavy fleet
IFFCO UAE ran six heavy trucks (550 L tanks) for one month: 7.4% average savings, device cost recovered in about 30 days.
−25–85% emissions
KSRTC government buses in India: emission cuts on nine of ten buses, and BS-II buses met BS-IV norms without engine modification.
6–12% fuel savings
California Environmental Engineering FTP-75 tests on Kenworth Class 8 and 9 heavy-duty trucks (2007–2009).
Before you order
Will it void my vehicle warranty?
No. The device is passive — no chemicals, no electronics and no engine modification — so the vehicle warranty is unaffected.
How soon will I see results?
The device activates within about 30 minutes. For a reliable before-and-after comparison, record fuel consumption over two to four weeks of normal use.
My tank is larger than 500 litres — what do I do?
Use one device set per 500 litres of tank capacity, or contact us for custom industrial and marine specifications.
How do I register the warranty?
Enter the serial number from the packaging at our product registration page. Warranty runs 12 months from registration.
Does it need maintenance or replacement?
No maintenance, no refills. The service life is 10 years; after that, simply replace the unit.
How do I know my unit is genuine?
Every genuine unit has a serial number you can verify on the registration page. Units bought outside authorized channels cannot be registered.
Ready for Model D50?
Order online, request a quote for volume, or talk to us about a structured fleet pilot.