Key Features: Valve Seat Protection: Maintains optimal lubrication for non-hardened valve seats, enabling smooth conversion to unleaded fuel. Reduced Cylinder Head Wear: Protects against wear, ensuring consistent compression and long-term engine performance. Turbocharger and Catalytic Converter Safe: Proven to be harmless to critical engine components. Improved Fuel Efficiency: Cleans deposits from intake valves and combustion chambers, resulting in better fuel economy and smoother operation. Easy Application: Simple dosing—25 ml per 25 litres of fuel—for hassle-free use. This 250 ml bottle treats up to 250 litres of fuel, offering an efficient and practical solution for maintaining the performance of older engines while ensuring reliability and efficiency for daily driving.

Delivery Services

(*Free delivery and Express delivery services are not available for orders to International countries; out of area postcodes in the UK and a products that require a specialist delivery. For full details about out of area postcodes, please see the ‘out of area charges and delivery times’ section below).

Deliveries involving specialist or dangerous goods that necessitate additional precautions, such as marking transport units, declaring information to authorities and shipping companies, and handling documentation, may incur extra fees. A surcharge of £1 may apply to these items, with a specific charge of £4.95 for batteries.

We have a number of premium services if you would like to upgrade

PLEASE NOTE: Orders placed after 4pm, will be processed the following day, adding 1 working day to the delivery service. When selecting 'Next Working Day' - Orders placed after 4pm on a Thursday, will be delivered on the next working day which is the following Monday. For orders placed on a non-working day (Saturday or Sunday) please add 1 working day to your delivery date.

You will have the option on checkout to upgrade your delivery to one of these services: Next working day delivery excludes items which are not marked as in-stock.

Free Delivery is not available for Over-Sized parcels, such as Exhausts, Radiators & Headlamps - For details on these items please see the 'Oversized Items' section below.

If your item is Over-Weight (Over 20kgs) you may incur an additional charge. If this is the case you will be contacted once your order is placed.

Due to the volume of economy deliveries, please allow a full 7 working days before contacting our customer service centre. All delivery times are approximate and can be delayed due to circumstances outside of our control.

No deliveries will be made on Sundays or Bank/ Public Holidays.

Delivery timescales will vary for items which are not marked as in-stock.

Find out more about Delivery Services.

Returns

At CSK Auto Spares we hope that you are happy with your purchase, however, we know that sometimes you will need to return or cancel an item. You can return your purchase to CSK Auto Spares warehouse.

• Any products returned must be in a re-saleable condition & include the original packing and documentation.
• CSK Auto Spares must be informed of any return requests within 14 days of the original order date.
• Before returning any goods please read our Terms and Conditions

Before returning your item(s) please contact CSK Auto Spares Ltd for a Returns Authorisation Number.

For international returns queries, call us on +44 141 237 5225. Find out more about returns.

You'll find returns information on your delivery note. Unless faulty, we'd like you to make your return within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

For more information call CSK Auto Spares Customer Services Department on +44 141 237 5225 or Email the customer service department at info@cskautospares.com

Find out more about returns.