[STH] Fuel Economy Booster – Boost MPG 50%+, Reduce Noise/Vibration, Easy Additive for Every 2,000–2,500km, Ideal for Older Cars - Made in KOREA

[STH] Fuel Economy Booster – Boost MPG 50%+, Reduce Noise/Vibration, Easy Additive for Every 2,000–2,500km, Ideal for Older Cars - Made in KOREA

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USD $11.35 USD $15.13 -25%
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Product Code: STH_Fuel Economy Booster
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Ship from South Korea

Available Options

House Brand available (OEM, ODM, OBM)
Dropshipping available

Seller information
  • 오존층살리고 주식회사
  • South Korea
  • Premium Partner
  • Seller Rating:    0 Reviews
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  • Product Description

    Fuel Economy Booster – Drive Like New Again!


    Perfect for:

    - Drivers frustrated with poor fuel efficiency
    - Those dealing with engine noise and vibration
    - Anyone looking for a powerful, reliable engine booster

    Why Choose STH Fuel Economy Booster?

    - Use every 2,000–2,500 km for optimal results – ideal for cars driven over 50,000 km or more than 5 years old.
    - Patented Complete Combustion Technology – the only Korean product using eco-friendly petroleum-based microorganisms to achieve complete combustion.
    - Boost fuel efficiency by over 50% in older vehicles with long-term use.
        - Save up to 784,615 KRW per year if fuel efficiency improves by just 30%! (Based on 1,700 KRW/L fuel cost & 20,000 km/year)
    - Reduces engine knocking, noise, and vibration by preventing incomplete combustion.
    - Keeps your engine clean long-term – instead of removing engine dirt like typical additives, it prevents buildup entirely.
    - Feels like driving a brand-new car – improves both performance and economy.

    How to Use

    - Wait until the fuel warning light comes on.
    - At the gas station, add STH Fuel Economy Booster first, then refuel with the correct amount of fuel (recommended in liters).
    - Do not use more than 3 times in a row.
    - For compact cars (25–35L tanks), use half a bottle twice in a row.
       - Funnel recommended for easy pouring.

    Product Composition

    - 100ml for Gasoline engines
    - 100ml for Diesel engines





    [STH] Fuel Economy Booster is a fuel additive used every 2,000 to 2,500 km.
    Use it on vehicles that have driven 50,000 km or more for 5 years.



    Prevents incomplete combustion and induces complete combustion through the composite catalytic action of three types of eco-friendly petroleum-based microorganisms.
    We are the only company in Korea to possess patented technology for complete combustion.




    By inducing complete combustion, older vehicles can see an average fuel efficiency improvement of more than 50% over the long term.
    If fuel efficiency is improved by 30%, annual fuel costs are saved by 784,615 won. (Based on fuel cost of 1,700 won per L / 20,000 km driving distance)




    Complete combustion prevents knocking, reducing noise and vibration. Unlike other fuel additives that clean engine sludge, the patented complete combustion technology prevents engine sludge from accumulating, keeping the vehicle like a new car.
    This is why it is a top priority for vehicle maintenance, both economically and effectively.




    - When the fuel low warning light comes on, first put STH Fuel Economy Booster at the gas station and refuel the correct amount. It is convenient to refuel in liters (L).
    - Do not use more than 3 times in a row.
    - When refueling 25~35L (compact car), use half a bottle twice in a row. *Funnel recommended



    Global Shipping

    ROAExpo provides Global Shipping to over 130+ Countries worldwide.
    All orders are shipped from our Central Logistics Hub, currently operated in South Korea, where ROAExpo directly performs free pre-shipment QQ Inspection (Quality & Quantity Inspection). Additional regional logistics hubs will be expanded globally in the future.

    Available Shipping Methods

    • Sea Parcel – Most economical option for heavy or bulk orders
    • Air Parcel – Balanced option between cost and delivery speed
    • EMS – International postal delivery service
    • FedEx – Fast express courier service
    • UPS – Premium international courier service

    Shipping availability and transit time may vary depending on destination country and local regulations.

    Shipping Cost Calculation

    • Destination Country
    • Total Shipment Weight
    • Selected Shipping Method

    Products from different brands or stores can be combined into one shipment when shipped from the same origin country.
    You can combine products from multiple brands or stores in one cart to reach the USD $150 purchase threshold and receive shipping discounts, as long as the products are shipped from the same origin country.

    The Final Shipping Cost Before Payment is clearly displayed at checkout. There are No Hidden Fees after payment confirmation.

    Shipping Discount Benefits – Global Free Shipping (GFS)

    • Orders over USD $150 with total shipping weight under 3kg may qualify for Free Shipping
    • If total shipping weight exceeds 3kg, customers may receive up to USD $30 Shipping Discount
    • The GFS Coupon (Code: ENJOYGFS-KOR) is automatically issued to eligible members and can be found in the member’s account after login. There is no limit on the number of uses.
    • The GFS coupon may be combined with other promotions or coupons
    • Eligibility may vary depending on product category, shipping method, and stock availability

    Final discounted shipping cost is shown before payment confirmation.
    Seasonal shipping promotions are announced on our homepage banners and member emails.

    Order Processing & Tracking

    All orders undergo free pre-shipment QQ Inspection directly performed by ROAExpo before shipment.
    Once shipped, a Tracking Number will be provided to the customer.

    Delivery time may vary due to customs clearance, local carrier operations, weather conditions, or public holidays.

    Customs & Import Duties

    Import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the customer unless otherwise stated.

    Customer Support

    ???? cs@roaexpo.com
    ☎️ +82-2-6951-0318 (Available Monday–Friday, 10:00–17:00 KST)

    Authentic Products Guarantee

    All products sold on ROAExpo are Authentic Products sourced directly from Official Suppliers or manufacturers.

    Returns Due to Defect or Shipping Error

    If a product arrives damaged, defective, or incorrect, please contact Customer Support within 7 days of delivery and provide photos or videos as evidence.
    ROAExpo will review the case and provide appropriate resolution, including replacement or refund when applicable.

    Returns for Change of Mind

    Due to international shipping and customs regulations, returns for personal reasons may be restricted.
    In such cases, the customer may be responsible for all return shipping costs and any applicable customs charges.

    Please contact Customer Support before initiating any return shipment.

    Refund Processing

    Refunds are processed after the returned item is received and inspected, or after the claim is verified.
    Refund processing time may vary depending on payment method and financial institutions.

    Non-Returnable Items

    Certain products may not be eligible for return due to hygiene, safety, or manufacturer restrictions.

    Customer Support

    ???? cs@roaexpo.com
    ☎️ +82-2-6951-0318 (Available Monday–Friday, 10:00–17:00 KST)

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