“We installed the D21 system across our light truck fleet in Portugal. Average fuel savings hit 6–8%, and the drivers noticed smoother acceleration within the first week.”

— Logistics Manager, Volvo Fleet, Portugal

“IFFCO tested the system on six heavy-duty vehicles with 550L tanks. Monthly fuel efficiency improved 5–13%, with an average of 7.4%. No modifications, no maintenance — just install and drive.”

— IFFCO UAE Fleet Testing Report

“We’ve deployed Greentech across our Karnataka State Road Transport Corporation buses. Emission reductions ranged from 25% to 85% depending on vehicle age, and BSII buses met BSIV standards without engine retrofits.”

— KSRTC Government Fleet, India

Q: How does the D21 system improve fuel efficiency?

A: The ceramic fuel enhancer emits far-infrared waves that break down diesel molecule clusters, reducing viscosity and improving atomization. This leads to finer fuel mist and more complete combustion. The air intake filter ensures optimal oxygen supply, further enhancing the burn efficiency. Result: 5–25% fuel savings reported across various fleet deployments.

Q: Is installation difficult? Can I install it myself?

A: The system is non-invasive and doesn’t require engine modifications, but we recommend professional installation to ensure correct placement. The fuel enhancer must be positioned inside the tank away from the float sensor (to avoid fuel gauge interference), and the air filter needs proper alignment in the intake pipe. Installation guide is included, but having a mechanic or fleet technician handle it ensures optimal performance.

Q: Will this void my vehicle warranty?

A: No. The Greentech D21 system is entirely non-invasive — it doesn’t modify the engine, ECU, or any OEM components. It sits passively inside the fuel tank and air intake without altering factory systems. However, we always recommend consulting your vehicle manufacturer or dealer if you have specific warranty concerns.

Q: How long does the D21 system last? Does it need maintenance?

A: The ceramic core has a 10-year lifespan with zero maintenance required. No filter changes, no replacement parts, no ongoing costs. Once installed, it works continuously for the life of the product.

Q: What kind of fuel savings can I realistically expect?

A: Global fleet data shows fuel savings ranging from 5% to 25%, with most fleets averaging 6–12%. Actual results depend on vehicle age, maintenance history, driving habits, and operating conditions. Older vehicles with incomplete combustion issues tend to see higher gains. New, well-maintained vehicles may see more modest but consistent improvements.

Q: Can I use D21 if my tank is larger than 200L?

A: For tanks between 201–300L, consider the D20/D21 system (same unit, just confirming capacity match). For tanks over 300L, you’ll need the D50/D51 system, which handles up to 500L per unit. If you’re running Class 8 heavy-duty trucks with dual 300+ gallon tanks, you’ll typically need 2–3 units. Contact us for proper sizing guidance.

Q: What certifications does the D21 system have?

A: Greentech products are certified by TÜV Rheinland (Germany), Taiwan, DOTARS Australia (ADR-79/81), and tested by Hong Kong Polytechnic University. They’ve also been validated through commercial deployments with KSRTC India (government bus fleet), IFFCO UAE (550L diesel vehicles), Volvo fleets in Portugal, and logistics operators in Saudi Arabia and Qatar.

Q: I manage a fleet. Can I get volume pricing or try a pilot program?

A: We offer volume discounts for fleet operators and authorized distributors. However, we don’t provide free pilot programs or risk-free trials — verification happens through your initial commercial order. Please contact us with your fleet size, vehicle specifications, and deployment timeline, and our team (Rita) will provide a custom quote and implementation plan.

Q: I’m interested in becoming a regional distributor. How does that work?

A: We welcome partnerships with qualified distributors, EPC contractors, and importers in regions where we don’t currently have authorized representation. Please provide: (1) your company name and business type, (2) target countries/regions, (3) estimated first-order volume, and (4) implementation timeline. Our team will verify regional availability and discuss partnership terms. Note: We protect existing distributor territories and cannot authorize overlapping agreements.

Q: Is this a fuel additive?

A: No. The Greentech D21 is a physical device, not a chemical additive. It uses patented ceramic technology to emit far-infrared waves that alter the molecular structure of diesel fuel, improving combustion without introducing any foreign substances into your fuel supply.