Millers Oils CVL Extra Competition Valve Lubricant - 6x500ml
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Product Information
Full details
Millers Oils CVL Extra is designed for owners of competition, classic, and high-performance vehicles who require enhanced engine protection and fuel performance when running unleaded or ethanol-blended petrol. The key benefit is its ability to protect against valve seat recession while acting as a combustion enhancer that allows for more advanced ignition timing without the risk of pre-ignition. A notable caveat is that this is a professional-grade additive intended for high-stress motorsport use, so it should be measured and added carefully to every fuel fill-up to maintain consistent engine health.
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Extended Product Information
FAQs
Can I use CVL Extra in a daily driver?
Yes, it is safe for all petrol engines, though it is specifically optimized for the high-stress demands of motorsport.
Does it harm catalytic converters?
No, CVL Extra is formulated to be safe for use with modern catalytic converters and oxygen sensors.
How many octane numbers will this add to my fuel?
It adds up to 4 octane numbers to your base fuel depending on the quality of the petrol used.
Is this product effective against E10 petrol?
Yes, it provides protection against the corrosive effects of ethanol found in E5 and E10 unleaded petrol.
Do I need to add it every time I fill up?
Yes, to maintain consistent protection and performance, you should add the required amount every time you refuel.
Troubleshooting
Engine knocking or pinging despite using additive
Check your ignition timing settings to ensure they are not exceeding the limits allowed by the 4-octane boost increase.
Difficulty measuring exact amounts
Use a graduated pouring spout or a calibrated measuring cup specifically labeled for chemical additives to ensure precise dosing.
Pros and Cons
Pros
- Significantly reduces valve seat wear
- Boosts octane for increased performance
- Protects fuel systems from ethanol-related corrosion
- Compatible with a wide range of fuel types
- Safe for use with modern catalytic converters
Cons
- Requires manual addition at every fuel stop
- Specifically formulated for high-stress use which may be overkill for daily driving
- Bulk packaging (6x500ml) requires storage space
Setup, Compatibility & Care
CVL Extra is highly versatile but requires proper dosing for safety. Always add the lubricant directly into the fuel tank before filling it with petrol to ensure thorough mixing. It is compatible with all petrol engine types, including those with turbochargers and catalytic converters. For best results, keep the bottles stored in a cool, dry environment away from direct sunlight. While it is safe for your engine, avoid contact with painted surfaces as fuel additives can potentially damage automotive clear coats.