you not wish to have your car classic 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
Castrol's products are designed to replacement the lead element missing
in unleaded petrol and negate any harm possible caused by ethanol. The
Valvemaster Plus also contains an octane booster to boost the octane
level of unleaded petrol up to the desired 98 level (equivilent of the
old 4 star) for correct running of classic 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.
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
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.
Valvemaster Fuel Additives contain
Etha-Guard. Etha-Guard counteracts ethanolís hygroscopic nature,
preventing moisture and damage to your fuel system, stabilising E5 &
E10 petrol. Enables use of E5 & E10 petrol. Prevents corrosion in
fuel systems. Prevents acidity in ethanol fuel. Keeps fuel system clean.
Protects your vehicle in use or storage; also prevents damage to
fibreglass fuel tanks.
Designed within the cap is a measuring device in order to make it easy
to calculate how much additive to use - 10 ml of castrol Valvemaster
treats 10 litres of unleaded fuel, so the 250ml bottle treats 250L of