Model D51
The complete heavy-duty diesel set for tanks up to 500 litres — buses, long-haul trucks, cranes and large fleets.
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Model D51 at a glance
| Model | D51 |
| Fuel type | Diesel |
| Tank capacity | Up to 500 litres |
| Package contents | Fuel Enhancer (500 L) × 1 · Air Refiner × 1 |
| Installation | Drop the enhancer into the fuel tank; fit the Air Refiner at the air intake. 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 | Buses, long-haul trucks, cranes and large fleets |
| Origin | Designed and manufactured in Taiwan · Taiwan and U.S. invention patents |
Fleet fuel is a cost you can actually manage
Tractor units, coaches, mixers — for heavy vehicles with tanks up to 500 L, this is the flagship answer.
Fuel is 30%+ of operating cost and rates are locked.
IFFCO ran six heavy trucks: cost recovered in 30 days — everything after is yours.
✓ UAE IFFCO: payback in 30 daysRun it on my fleet →
Smoke tests plus passenger perception — pressure from both sides.
Government bus testing: 9 of 10 passed, smoke down as much as 85%.
✓ KSRTC India official reportRun it on my fleet →
Heavy loads and long idling — burn and smoke both invite fines.
Complete combustion; idle smoke visibly improves.
✓ India 2026 trial: +7.2% avgRun 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? Tanks over 500 L / stationary units → D50 · Light commercial → D21
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 →+7.2% over 219,793 km
Two Indian fleets, 4 heavy trucks · 9–13 months · payback 2.4–3.1 months · 2025–26
Full case study PDF →Diesel +33.6%
Ethiopia ECAE official test · Toyota Hilux · HC −79% · 2022
Official test PDF →2.6 → 3.5 km/L
Bin Sraiya Readymix, Qatar · Mercedes heavy truck · +34.6% · 2023
客戶測試信 PDF →10% average across fleet
Hizam Al-Qahtani Transport, Saudi Arabia · Actros MP2/3/4 + Sino · "no problems" · 2025
Case studies →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.
Fit the Air Refiner at the air intake
Place it by the air cleaner following the illustrated guide in the box.
Run a fleet pilot
Baseline 3–5 vehicles for four weeks, install, then compare — we provide the pilot protocol and case template.
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.
+7.2%, proven over 219,793 km of real fleet operation
Two independent fleets — PS Blue Metals (aggregate tippers) and Mumbai Carriers (long-haul) — four heavy vehicles, tracked up to 13 months. All figures come from the fleets’ own fuel-filling and odometer records.
| Fleet | Vehicle | Monitored | KM run | Before (kmpl) | After (kmpl) | Gain | Diesel saved (L) | Value (₹) |
|---|---|---|---|---|---|---|---|---|
| PS Blue Metals | TN11 BU 8080 | 9 months | 63,086 | 2.73 | 2.94 | +7.7% | 1,622.7 | 1,62,275 |
| PS Blue Metals | TN22 EE 8080 | 81 days | 24,713 | 2.93 | 3.15 | +7.5% | 578.5 | 54,379 |
| Mumbai Carriers | TN39 CU 5748 | 65 days | 25,097 | 3.69 | 3.94 | +6.8% | 434.4 | 43,435 |
| Mumbai Carriers | TN39 DA 2869 | 13 months | 106,897 | 3.45 | 3.70 | +7.2% | 2,088.0 | 2,08,797 |
| TOTAL — 4 vehicles | 219,793 | — | — | +7.2% avg | 4,723.6 | 4,68,886 | ||
Operator video testimonials (7)
Siva Siva Transport
Sri Lakshmi Saraswathy
KRS Bus Service, Salem
Sri Venkateswara Bus
Chellam Bus, Harur
STS Bus
Saravana Bus, Dharmapuri
Source: fleet fuel-filling and odometer records (Sep 2025 – Aug 2026); savings valued at each fleet’s own diesel purchase price. Provided by authorised India distributor Alga Engineering Solutions LLP (Chennai). Individual results vary with vehicle condition, load, route and driving pattern; the documented range across third-party tests is 5–25%.
Ready for Model D51?
Order online, request a quote for volume, or talk to us about a structured fleet pilot.