D-Ball
The smallest diesel enhancer — one ball dropped into a diesel tank up to 20 litres: small engines, pumps and equipment.
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D-Ball at a glance
| Model | D-Ball |
| Fuel type | Diesel |
| Tank capacity | Up to 20 litres |
| Package contents | Fuel Enhancer ball (20 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 | Small diesel engines, pumps and equipment |
| Origin | Designed and manufactured in Taiwan · Taiwan and U.S. invention patents |
The entry point for small diesel engines
Tillers, small generators, irrigation pumps — one ball covers it.
Harvest season means refilling drums nonstop while machines cannot stop.
Drops into the tank — no workshop visit, no modification.
✓ 20 years · 15 countries · 5–25%That’s me — buy now →
Long running hours: fuel burn plus visible black smoke.
More complete combustion — the smoke difference is visible.
✓ Govt bus tests: up to −85% smokeThat’s me — buy now →
Runs all day; fuel flows away with the water.
The same ball serves every small diesel engine you own.
✓ 12-month warranty · serial-verifiedThat’s me — buy now →🌿 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? Diesel pickup / SUV → D11 · Commercial vans → 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 ball into the fuel tank
Open the fuel cap and drop it in — it sits in the tank for its whole service life.
Run the engine as usual
Activation begins within about 30 minutes of normal operation.
Measure your own result
Record fuel use for a few weeks before and after to see the difference on your own equipment.
The same drop-in method applies across vehicle types.
What tests show for diesel engines
6–12% fuel savings
California Environmental Engineering, FTP-75 laboratory cycles on diesel vehicles including a Dodge RAM and Kenworth trucks (2007–2009).
7.4% across a heavy fleet
IFFCO UAE ran six heavy trucks for one month: 7.4% average savings, device cost recovered in about 30 days.
+33.6% fuel economy
Ethiopian Conformity Assessment Enterprise measured a diesel Toyota Hilux under CES 6655:2021 (2022).
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 20 litres — which model do I need?
Choose D10 or D11 for tanks up to 100 litres, D20/D21 up to 200 litres, or D50/D51 up to 500 litres.
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 D-Ball?
Order online, request a quote for volume, or talk to us about a structured fleet pilot.