LUCAS ENGINE OIL STOP LEAK 946ml Stops Leaks Rejuvenates Seals & Gaskets
14-day returns on all eligible orders
Contact us within 14 days of receiving your order to request a return.
Shipping information
Orders are picked, packed and dispatched from our Northampton warehouse.
- Free delivery to mainland UK addresses on orders of £40 or more.
- Orders under £40, and orders to Northern Ireland, have a delivery charge, shown at checkout before you pay.
- You will get an email with your tracking number once your order has shipped.
Full details are in our Shipping Policy.
Returns & warranty
Changed your mind? You can return an online order within 14 days of receiving it. Please contact us first for return instructions, then you have 14 days to send the goods back.
- Items must be unused, complete and in their original condition, with all accessories, instructions and original packaging.
- You arrange and pay for the return postage on change-of-mind returns. We refund the price of the item plus our standard delivery charge.
- Damaged in transit? Let us know within 48 hours of delivery - photos help.
- Faulty or wrong item? Contact us before sending anything back. Faulty goods are covered by your statutory rights.
Your statutory rights are not affected. Full details are in our Refund Policy, or email onlinesales@nn4online.co.uk.
LUCAS Engine Oil Stop Leak
Our engine oil stop leak is a unique formulation of Lucas additives and very specific base stock designed to stop seal leaks in engines. It contains nothing that could be harmful to an engine and can actually extend the life of engine oil by at least 50%.
In petrol engines: A puff of white smoke out the exhaust in the morning is a sure sign of worn valve seals allowing oil to seep past the valves into the combustion chamber when the engine is not running. This is a sign of a high mileage engine, allow a few days for Lucas Engine Oil Stop Leak to correct this problem. To keep the problem correct a litre (946ml) will be advised to be added with each oil change.
Leaking engines are usually older engines. Lucas Engine Oil Stop Leak is not only a leak stopper but also an excellent additive for worn engines. The user can expect less engine noise, higher oil pressure and less oil consumption as the Lucas additives fill the space between worn parts
Lucas Engine Oil Stop Leak is also effective at stopping leaks in automatic transmissions, hydrostat transmissions or hydraulic systems. 10% is usually adequate - more can be used in badly worn units.
Directions: In cars replace a litre of engine oil with a litre of Lucas Engine Oil Stop Leak. In larger engines, usually diesel, use 10% to 20%.