Carlube Lead Substitute Petrol Additive - QFS300
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Product Information
Full details
The Carlube Lead Substitute (QFS300) is an essential additive for owners of classic cars and vintage vehicles originally engineered for leaded petrol. It provides critical protection against valve seat recession and wear while simultaneously maintaining fuel system cleanliness and preventing internal corrosion. While it is highly effective at preserving older engine components, owners must remember to add the formula at every refueling session to ensure consistent protection.
All features
| Model Part Number | QFS300 |
|---|---|
| Brand | Carlube |
Extended Product Information
FAQs
Does this replace the need for leaded fuel?
Yes, it is designed to replace the protective qualities of leaded fuel for older engines.
Can I use this in a modern fuel-injected car?
This product is specifically formulated for classic engines with soft valve seats; it is not necessary for modern cars designed for unleaded fuel.
What is the treat rate for the 300ml bottle?
One 300ml bottle is sufficient to treat up to 50 litres of petrol.
Should I use it every time I fill up?
Yes, for maximum protection against valve seat recession, you should add the substitute every time you refuel.
Does this affect the fuel filter?
No, the additive is fully soluble and will not clog or damage fuel filters.
Can this be used in two-stroke engines?
No, this product is intended for four-stroke petrol engines used in classic vehicles.
Troubleshooting
Engine knocking or 'pinking' after treatment
Ensure the petrol used meets the octane requirements specified in your vehicle's owner manual; the lead substitute does not significantly raise octane levels.
Additive not mixing properly in a low fuel tank
Always add the supplement to the tank before adding fresh petrol to allow the incoming fuel to agitate and distribute the additive evenly.
Pros and Cons
Pros
- Specifically designed for classic engine metallurgy
- Easy to use during standard refueling
- Helps prevent expensive valve seat damage
- Cleans fuel delivery components
- Protects against fuel system corrosion
Cons
- Requires manual addition at every fill-up
- Only intended for petrol engines
- Does not compensate for low octane requirements
Setup, Compatibility & Care
This product is designed for direct use in vehicles that require leaded fuel and are currently running on unleaded petrol. No mechanical modifications to the engine are required to use this additive. To maintain the health of your fuel system, ensure the cap of the 300ml bottle is tightened securely after use and stored in a cool, dry place away from direct sunlight. Always handle the additive with care, avoiding skin contact, and dispose of the empty bottle according to local environmental regulations.