Greentech D20 Diesel Fuel Saver — Twin-Tank Trucks, Buses & Machinery (2 × 100 L)
- 5–25% less fuel in documented results*
- About 10 years, no maintenance
- Patented in multiple countries
$289.00
One-time price · about $2.41 a month over its 10-year life- Less diesel, less smoke: the fuel burns more completely, so every litre goes further.
- Two enhancers in the pack: one for each 100 L tank, or both in one tank up to 200 L.
- Fitted in minutes: drop them into the tanks. No wiring, no engine changes.
- About 10 years: no maintenance, nothing to replace.
- Free shipping over US$150FedEx from Taiwan
- 12-month product warrantycovers the unit itself
- Genuine, serial-numberedverify it online
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Buying for a fleet? Get a volume quote →
*Documented fleet and test results. Each vehicle is measured against its own original fuel use, so the same fuel saved shows as a different percentage on different vehicles. Results vary with engine condition, load and route.
Made for twin-tank trucks and working machines
Twin-tank trucksone enhancer per tank
City & coach buseslong daily hours
Excavators & loadersmining and construction
Tractors & harvestersfarm machinesTwo diesel tanks of about 100 L, or one tank up to 200 L. Bigger tank? The D50 covers up to 500 L.
Measured by the people who run them
Operators measured their own vehicles and machines before and after fitting. Tap a card for the original document.
🇮🇳India · TVS Mobility, Ashok Leyland dealer+10–15%km per litre on two service trucks, monthly fuel logs from 2021 to 2024Signed letter →
🇪🇹Ethiopia · Anbessa City Bus−8.89%diesel per km on city bus 8407, from the operator’s own refuelling recordsOperator’s fuel log →
🇪🇹Ethiopia · Sheger Mass Transport−7.42%diesel per km on a city bus: 0.432 → 0.400 litres per kmOperator’s letter →
🇮🇳India · Vela Blue MetalD21−15.8%diesel per hour on a wheel loader: 9.5 → 8.0 litres per hourSigned certificate →30 named fleets, plants and public agenciesin 8 countries, each with the original documentSee every case →“The drivers noticed that the trucks which installed Greentech devices performed better in overall engine performance, with less exhaust emissions.”
Each vehicle is measured against its own original fuel use, so the same fuel saved shows as a different percentage on different vehicles. Results vary with engine condition, load and route. All test reports →
Fitted in five minutes, working in thirty
It depends on the application
The enhancer must be in direct contact with the fuel, so it always goes inside the fuel tank.
Take the fuel cap off. Can you see the fuel?
✓Yes: drop it in
Motorcycles and scooters, generators and stationary machines, some boats and other machinery: the fuel is right there, so it is simple to drop the enhancer in.
!No: many cars
The filler often has an anti-siphon valve. The tank is reached through the fuel-pump or fuel-sender service opening instead: a job for a workshop, with the fuel drained first.
- 1Fuel-pump / fuel-sender service opening (usually under the rear seat)
- 2Where the filler pipe joins the tank, underneath
- ✕Filler neck and its anti-siphon valve
Never force it down a car's filler.It can jam in the filler pipe, and the pump nozzle will then keep cutting off every time you refuel.
Not sure? Have a qualified mechanic or an authorized Greentech installer do it. Labour costs vary, so ask for a price first.
Installation guide (PDF):English · 中文
⚠Fuel is hazardous and flammable. Do not smoke near the fuel tank.
- Open the fuel cap
- Drop one enhancer into each tank
- Close the cap and drive as usual: it starts working within about 30 minutes
Greentech is a patented, passive fuel enhancer. Proprietary Greentech Fuel Enhancing Technology helps the fuel atomize finer and burn more completely: more of every litre turns into work, with lower CO and HC emissions and fewer engine carbon deposits.
How the technology works →
Installation video: dropping the enhancer into the tank.
What could it save you?
Slide between 5% and 25%, the documented range.
Most documented results: 5–25% less fuel. Each vehicle is measured against its own original fuel use — the more efficient the vehicle, the bigger the denominator and the smaller the % looks, but the litres still add up. Results vary with engine condition, load and route.
Pick the size for your tank
D-Ballup to 20 LEnhancer
D10up to 100 LEnhancer
D11up to 100 LEnhancer + Air Refiner
D202 × 100 L or 200 LEnhancerThis model
D212 × 100 L or 200 LEnhancer + Air Refiner
D50up to 500 LEnhancer
D51up to 500 LEnhancer + Air RefinerChoose by fuel and tank size, one enhancer per tank. Models ending in 1 add the Air Refiner on the air intake. Product selector →
What you get
- D20 fuel enhancers (100 L) × 2
- Serial-numbered security label
- Fuel
- Diesel
- Tank
- Two tanks of about 100 litres, or one tank up to 200 litres
- In the box
- Fuel enhancer (100 L) × 2
- Fitting
- Sits in the fuel tank; no wiring, no engine changes
- Maintenance
- None
- Service life
- About 10 years
- Construction
- Aluminum alloy casing with patented internal components
- Warranty
- 12-month product warranty, activated by registering the serial number
- Shipping
- FedEx from Taiwan · free over US$150
Questions before you buy
Will it fit my truck?
If your truck has two diesel tanks of about 100 litres, put one enhancer in each. A single tank up to 200 litres takes both. They go in through the filler neck; if a filler is narrow or the tank has baffles, place them at the next tank service.
How much will it save?
Documented fleet and test results run from 5% to 25% less fuel. Each vehicle is measured against its own original fuel use: that figure is the denominator, so the same fuel saved shows as a different percentage from one vehicle to the next. Results vary with engine condition, load and route; on the road, the gain is largest at steady cruising speed. Tip: write down your litres and kilometres (or engine hours) for the next couple of tanks before you fit it, and you will see your own number. Free fuel worksheet (Excel) · Online fleet fuel log
Is anything changed on the engine?
No. Nothing is cut, wired or reprogrammed and nothing is added to the fuel. The enhancer simply sits in the tank and keeps working for about ten years.
What does the warranty cover?
Register the serial number and your unit carries a 12-month product warranty. It covers the unit itself: if something goes wrong with it after installation, we replace it with a new one. Verify & register a product
Shipping, payment and returns
Orders leave Taiwan by FedEx within 1–3 working days, and delivery usually takes 3–7 days. Shipping is free on orders over US$150; below that it is US$29.99. Pay with PayPal, Apple Pay or Google Pay. If a unit arrives damaged or defective, we send you a new one. Payment & return policy
How do I know it is genuine?
Every unit carries a serial number (M plus ten digits) and a security label. Check it online before or after you buy, no account needed. Buy from Greentech or a listed distributor. Check a serial number · Find a distributor
Buying for a fleet?
Tell us your vehicles and tank sizes: we match a model to every tank and quote volume pricing. In some countries a local Greentech distributor serves you directly. Get a fleet quote · Find a distributor
Put the D20 to work
Two enhancers, two tanks, about ten years of cleaner burning.
Ships from Taiwan by FedEx · free over US$150 · 12-month product warranty
Greentech D20$289.00