D series · 7 models

Diesel Fuel Savers

Greentech is a patented, passive fuel enhancer that sits in the fuel tank. Proprietary Greentech Fuel Enhancing Technology helps the fuel atomize finer and burn more completely.
Trucks, buses, generators and boats: drop it in at refuelling. Diesel cars: fitted at a workshop.

5–25%documented fuel saving
+7.2%km per litre, 4 heavy trucks over 219,793 km (D51)
33.6%less diesel for the same distance, government test (D10)
~10 yearsno maintenance, no consumables

Each vehicle is measured against its own original fuel use, so the percentage differs from vehicle to vehicle.

01 · Models and where they fit

Pick by tank size, see where it goes

One set per tank; the models ending in 1 add an Air Refiner. Tap a photo for the full solution.

Diesel cars and pickups (D10 / D11): fitted at a workshop

On an ordinary car or pickup the enhancer does not go in through the filler. The workshop drains the tank, then places the enhancer into it through the fuel-pump opening, or where the filler pipe joins the tank underneath. Labour costs vary by area, so ask your workshop for a price first.

See how it is fitted ↓
D10 single unitD11 with Air Refiner

D10 / D11

Tank
Up to 100 L
In the box
D10: Fuel Enhancer × 1 · D11: plus Air Refiner
Fits
Diesel cars, pickups, SUVs, vans, generators, and boats or marine generators with tanks up to 100 L
D50 single unitD51 with Air Refiner

D50 / D51

Tank
Up to 500 L
In the box
D50: Fuel Enhancer × 1 · D51: plus Air Refiner
Fits
Heavy trucks, mixers, tippers, excavators, rig compressors, fishing boats and workboats: one D50 per 500 L of tank
02 · Feedback

What fleets, owners and government tests found

Every card opens the original document.

14.2% · 12.25%fuel saving on two trucks, one D50 eachYalçın Nakliyat International TransportAn IVECO (2001, Istanbul city work) and a BMC Tuğra (2019, İzmir–Istanbul long haul).Fleet report (PDF) →
−25%diesel for the same distance: a 2016 Mercedes truck on a D51, 2.6 → 3.5 km/LBin Sraiya Readymix ConcreteHighway duty; the original signed and stamped letter.Signed letter (PDF) →
−10%fuel on a long-haul truck and a concrete mixerUnimix ready-mix concrete“We plan to install this device in total fleet phase-wise.” Letter signed by the procurement manager.Signed letter (PDF) →
7.42%fuel saving on a public city bus: 0.432 → 0.400 L per kmSheger Mass TransportA 300-litre tank, six fill-ups before fitting against six after. Anbessa City Bus logged 8.89%.Test report (PDF) →
−11% · −24%diesel per running hour: two Kirloskar 45 kVA generators on a D10Goodwill Autos, generator dealer and hireFour months before fitting against four months after; report signed by the managing partner.Signed report (PDF) →

Results vary with engine condition, load and route. Each vehicle is measured against its own original fuel use, so the percentage differs from vehicle to vehicle.

03 · Fitting

Trucks at refuelling, cars at a workshop

The enhancer sits in the tank for about ten years, with no maintenance.

How to install

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.

Rear seat12

!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
click!

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.

A Greentech D51 in front of a truck in Da Nang

Trucks, buses and machines

D20 / D21 / D50 / D51: drop it in at refuelling, no workshop, no downtime

  1. Open the fuel cap at refuelling
  2. Drop the enhancer into the tank (both units on a D20)
  3. Dual tanks: one set in each tank

Tanks with internal baffles are fitted by your distributor or a trained installer.

Dropping a Greentech enhancer into a fuel tank

Generators, pumps and small engines

D-Ball / D10: do it yourself, open the cap and drop it in

  1. Open the fuel cap
  2. Drop the enhancer into the tank
  3. Close the cap and refuel as usual

D11 / D21 / D51 complete sets: one more step for the Air Refiner

Open the air filter housing
1Open the air filter housing
Place it on the intake side, before the filter
2Place it on the intake side, before the filter
Find a secure spot
3Find a secure spot
Secure it with the supplied cable ties
4Secure it with the supplied cable ties

Any workshop can fit it.

Boats save fuel too. Size each tank on its own: a diesel tank up to 500 L takes one D50; a larger tank takes one D50 per 500 L (2,000 L = four), or a made-to-order size; from 10,000 L per tank, one MFS-T10000 per 10,000 L. A generator with its own day tank gets its own unit (D10 up to 100 L, D50 up to 500 L). More complete combustion raises engine speed and output, so ask the engine maker first whether the engine has room for it. Size your tanks on the marine page →

A customer and two mechanics in a workshop
04 · Workshops & fleet service shops

Become a distributor

Diesel cars are fitted in a workshop, and fleets run their own service bays: both are natural partners for the Greentech diesel line. Workshops, garages and fleet service shops are welcome to apply in their country.

Questions

Which model do I need?

Pick by tank size, one set per tank: D-Ball up to 20 L, D10 up to 100 L, D20 up to 200 L (two units in the pack), D50 up to 500 L. To treat the air intake as well, choose the complete set: D11, D21 or D51. Product Selector →

Why do diesel cars and pickups go to a workshop?

On an ordinary car or pickup the enhancer does not go in through the filler. A workshop drains the tank, then places the enhancer into it through the fuel-pump opening, or where the filler pipe joins the tank underneath. Labour costs vary by area, so ask your workshop for a price first. See the fitting diagram →

How is it fitted to a truck or bus?

At refuelling: open the fuel cap and drop the enhancer into the tank. A D20 holds two units; both go into a tank of up to 200 L, or one into each tank of a twin-tank vehicle (each up to 100 L). For larger tanks choose the D50, one set per tank. Tanks with internal baffles are fitted by your distributor or a trained installer.

What is the Air Refiner?

The D11, D21 and D51 complete sets add an Air Refiner. It sits inside the air filter housing, on the intake side before the filter, held with the supplied cable ties. Any workshop can fit it. See the four steps →

Can it be used on fishing boats and other vessels?

Yes, boats save fuel too. Size each tank on its own: up to 500 L, one D50; above that, one D50 per 500 L (2,000 L = four), or a made-to-order size; from 10,000 L per tank, one MFS-T10000 per 10,000 L. A generator with its own day tank gets its own unit. More complete combustion raises engine speed and output, so ask the engine maker first whether the engine has room for it. Size your tanks on the marine page →

How much will we save?

Documented fleet savings run from 5% to 25%. 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. Log your fuel in the free Fleet Fuel Log →

Is there any maintenance? Is there a warranty?

No maintenance: the enhancer stays in the tank for about ten years. Register the serial number for the 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 →

Tell us what you run

Trucks, buses, machines, generators or boats: tell us the models, tank sizes and how many, and we match the models, quote and arrange fitting.

Looking for gasoline models? →
EN|中文