Würth Winter Diesel Peformance Improver
Würth Winter Diesel Peformance Improver
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Key Features
- Improves cold-weather diesel performance by enhancing filterability and lowering the cloud point.
- Prevents slush formation, avoiding clogged fuel lines and filters.
- Ensures reliable winter operation of diesel engines even at very low temperatures.
- Provides an improvement of up to -10°C (down to approx. -31°C depending on fuel quality).
- Compatible with all conventional diesel fuels (not effective with pure organic diesel).
- Suitable for cars, trucks, buses, and construction machinery, including common rail and pump/nozzle systems.

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Shipping Information
Shipping Information
What Are My Shipping Options?
In-Store Pickup
In-Store pickup is available on all purchase. Pickups are available Monday - Friday between the hours of 9:00–17:00.
An email confirmation will be sent when your order is ready for collection.
Free Shipping
We offer free Standard (2-3 Days) shipping on orders within the United Kingdom on orders over £100. Please note, some large items that require specialist courier companies, such as large mirrors and palleted items are excluded from this deal.
Shipping Fees
We also offer shipping at the following rates:
Standard-Size Parcel
Standard (UK Only) - 2-3 Days - £2.99
Express (UK Only) - 1-2 Days - £4.99
International (EU) - 3-7 Days - £14.99
International (ROW) - 5-10+ Days -£23.99
Large Parcel
Standard (UK Only) - 2-3 Days - £2.99
Express (UK Only) - 1-2 Days - £4.99
International (EU) - 3-7 Days - £14.99
International (ROW) - 5-10+ Days - £69.99
Most UK orders will be sent using Royal Mail, with larger items being sent with DPD.
International orders within the EU will normally be dispatched with Royal Mail, DPD, or UPS.
International orders to the rest of the world will normally be sent with DPD or UPS.
Please note, international delivery charges are very volatile and subject to change. We will do everything in our power to honour the delivery fee, however, in some cases, shipping may increase in price. In this event, you will be given the offer to pay the difference or cancel the order and receive a full refund.
Please note, we may be subject to various rules and restrictions in relation to some international deliveries, and you may be subject to additional taxes and duties over which we have no control. If such cases apply, you are responsible for complying with the laws applicable to the country where you live and will be responsible for any such additional costs or taxes.
Dispatch Times
Orders placed before 15:00 Monday - Friday will be shipped on the same day.
Orders placed after this time will be shipped on the following business day,
Please note, we are closed at weekends, as well as English Bank Holidays.
Returns Policy
Our refund policy can be found at the following address: https://esupplyline.com/policies/refund-policy.
Further Information
You can contact us for further information on our shipping policies using the following:
Phone: 01953 711 881
Email: sales@esupplyline.com
Live Chat: Available on our website, Monday - Friday, 8:30 - 17:00.
Contact Form: https://esupplyline.com/pages/contact
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Description
Optimised Diesel Performance in Winter
Würth Winter Diesel Performance Improver is a high-performance additive designed to maintain the fluidity of diesel fuel in cold weather. It modifies the crystallisation behaviour of paraffins, ensuring that diesel remains pumpable and filterable at low temperatures, thereby preventing engine failures caused by blocked filters or frozen lines.
Reliable Cold Weather Protection
By lowering the cloud point and pour point, the additive helps fuel flow freely in sub-zero conditions, securing reliable starting and smooth operation. Depending on fuel quality, improvements of up to -10°C at temperatures as low as -31°C can be achieved.
Practical and Universal Application
The additive is suitable for all diesel-powered vehicles and machinery, including modern systems with common rail and pump/nozzle injection technology. It is best used continuously throughout the winter months to ensure consistent protection.
More Information
Application Instructions
- Add the additive before the diesel fuel temperature drops below 0°C and before any paraffin flocculation occurs. Once flocculation has occurred, it cannot be reversed by this product.
- Shake the container if necessary and pour directly into the fuel tank.
- For best results, add immediately before refuelling, allowing the product to mix thoroughly with the incoming fuel.
Dosage
- 1,000 ml treats approx. 1,000L of fuel (ratio 1:1,000).
- 300ml treats approx. 150L of fuel (ratio 1:500).
- 150ml is sufficient for up to 70L of fuel.
Usage Notes
- Additive and diesel should ideally be at room temperature when mixing.
- Do not store or add product below the freezing point of diesel fuel.
- Continuous use is recommended throughout the colder seasons.
Specifications
Chemical Basis: Combination of additives
Colour: Transparent / translucent / opaque
Fragrance: Characteristic
Contents: 1,000 ml
Density: 0.813 g/cm³ (at 20 °C)
Flash Point: ≥ 63 °C
Shelf Life: 60 months from production (store in a cool, dry place)