Free Uk Delivery
On Orders above £60
60 Day Returns
Free Expert Advice
No Leak Guarantee
01209 202944
Castrol EDGE SUPERCAR 10w-60
RED LINE Lead Substitute Additive

RED LINE Lead Substitute Additive

RED LINE Lead Substitute - 355ml Bottle

355ml Bottle


Checking Stock



Add To Basket

  • Description
  • Benefits
  • Shipping Explained

RED LINE Lead Substitute Additive

RED LINE LEAD SUBSTITUTE is a safe and effective valve seat protection additive which is designed for use in engines which require the protection of lead. Tetraethyl lead was originally designed as an octane enhancer, but it was soon
discovered that the metallic oxides which result from combustion form a protective coating on valves which prevent microwelding of the valve seat to the valve
face under high temperature operation. This welding of the two hot pieces of metal causes the removal of the softer seat metal and subsequent recession of the
valve into the cylinder head. Wear debris then contributes to valve stem and valve guide wear. Valve recession causes poor sealing of the compression gases, which means loss of power and fuel economy, poor idle and driveability, and the eventual need for cylinder head replacement. This is achieved by using sodium-based chemistry which forms sodium oxides upon combustion and provides the same physical protection from welding and subsequent metal removal as did lead oxides. When compared to levels of lead present in the leaded supreme of prior years, Red Line Lead Substitute provides equivalent protection for valves and none of the detrimental side effects which can be found with other additives.

Red Line Lead Substitute additive prevents valve seat recession in vehicles designed to use leaded fuels and is endorsed by the Federation of British Historic Vehicle Clubs.
Red Line Lead Substitute prolongs the useful life of these engines, cleans carburetor deposits and injectors and will not damage catalytic converters.
Red Line Lead Substitute has been subjected to a valve seat recession test by an independent test house on behalf of the FBHVC. The results of the test indicate that the level of valve seat protection is likely to be adequate for all normal driving, but not including racing or other exceptionally arduous uses.

Recommended dosage: Add 1 bottle per tank of fuel. Treats up to 25 Gallons.

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • Reduces valve seat recession
  • Cleans carburetor and injector deposits
  • Reduces intake valve and port deposits
  • Concentrated for economical use


SHIPPING IS FREE* for orders of £60 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £4.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

Share this product:

Review Opie Oils

Review Stars

Rated Excellent