Frequently Asked Questions

A drop of fuel

Is Classic Valvemaster™ the same as Castrol Valvemaster™?

Castrol Valvemaster was designed for use in classic motor vehicles, hence the name change to Classic Valvemaster. Classic Valvemaster is a lead replacement additive with a unique phosphorus formula providing ultimate protection against valve seat recession. Todays’ ethanol blended petrol is not compatible with classic motor vehicles, therefore Classic Valvemaster and Classic Valvemaster Plus contain Etha-Guard, an ethanol stabiliser to combat the harmful effects of ethanol. Etha-Guard prevents acidity and corrosion to enable classic vehicles safe use of E5 and E10 ethanol blended petrol. Classic Valvemaster Plus also contains Octimise Plus, a friction modifier providing increased acceleration and economy.

Does Valvemaster™ Plus boost acceleration?

Valvemaster Plus contains a friction modifier Octimise-Plus within its formula, providing instantaneous acceleration by up to 3%.

How much Valvemaster™ do I need to use?

Valvemaster and Valvemaster Plus are very economical and easy to use.  One 250ml bottle will treat 250 litres of petrol.  The unique bottle design has a user-friendly self measuring device for instant visual indication of how much additive to use.  This provides motorists with the flexibility to fill up with varying quantities of petrol.

can I switch to Valvemaster™ from a different additive?

Yes.  Valvemaster and Valvemaster Plus are both compatible with most other commonly used fuel additives. However, you should avoid mixing with sodium based products. We recommend that you first reduce to a minimum the fuel level in your tank before refilling with unleaded fuel and  Valvemaster or Valvemaster Plus.

Can I use Valvemaster™ if my engine has carburettors?

Valvemaster or Valvemaster Plus will work effectively in cars fitted with either carburettors or fuel injection.

Is Valvemaster™ suitable for catalytic converters?

No.  Valemaster and Valvemaster Plus should not be used in vehicles fitted with a catalytic converter.

Where can I buy Valvemaster™ and Valvemaster™ Plus?

Valvemaster range is available throughout the UK, across continental Europe and countries worldwide.  In fact, wherever a requirement exists, Valvemaster is available.  For assistance in locating Valvemaster you can visit our where to buy page or contact us here.