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|Castrol Valvemaster Plus
A 250ml bottle treats 250 litres fuel (c.4p per litre). Includes an octane booster to raise the octane rating from 95 ron to 97 ron.
A 250ml bottle treats 250 litres fuel (c.2.5p per litre)
Should you not wish to have your car engine converted to consume lead-free petrol by means of cylinder head conversion etc then you are highly advised to use a petrol additive. The lead in petrol plays two major roles; firstly it prevents valve recession into the head by means of lubricating action, and secondly provides an octane boost to ensure correct burning and alleviate pre-ignition (reducing pinking). Either of the above products are designed to replacement the lead element missing in unleaded petrol. The Valvemaster Plus also contains an octane booster to boost the octane level of unleaded petrol up to the desired 97 level for correct running of our cars. Should you not wish to use the octane booster then we would advise you to either alter the engine timing to account for the lower octane rating of unleaded petrol or use the more expensive super-unleaded.
With obvious concerns about the efficacy of Lead Replacement Petrol (LRP), especially as regards its lack of a British Standard, and the petrol companies' own warnings regarding the unsuitability of their product for "everyday" use, most owners are opting to use Castrol's Valvemaster plus.
In a test performed by the Federation Of British Historic Vehicle Clubs Castrol Valvemaster was shown to offer the highest level of protection. Valve master is recommended by many motoring clubs.
In a test performed by the Federation Of British Historic Vehicle Clubs Castrol Valvemaster was shown to offer the highest level of protection.
Click here to view a scan of the Castrol valvemaster leaflet
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"Making The Change": Technical advice on use of unleaded petrol from Department of Transport
Club Editorial Comments Concerning Unleaded
Of British Historic Vehicle Clubs: Tests performed on lead substitutes