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Engine Oils |
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CASTROL CLASSIC XL20w / 50 For Pre - 1980 Modern Classic Cars Castrol Classic XL 20w / 50 is a low detergent traditional multigrade engine oil , ideally suited to older technology modern classics . Compared to modern engines using sophisticated oil pumps to deliver higher pressure with low viscosity oils , modern classic vehicles have wider tolerances and require higher viscosity multigrade oils to operate at the optimum performance level . Castrol Classic XL 20w / 50 offers exellent oil consumption and a very high level of engine wear protection . CASTROL CLASSIC XL 30 For Pre - 1950 Veteran , Vintage & Classic Castrol Classic XL 30 is a traditional , low detergent SAE 30 monograde engine oil primarily for Pre 1950 veteran , Vintage and Classic Cars where an SAE 30 lubricant is specified . These engines are often in an unrestored or unknown condition and it is essential that a low detergent formlation is used to ensure that engine deposits which may currently seal the engine are not loosened , causing oil leaks or blocking of the oilways . Castrol Classic XL 30 offers excellent cold temperature starting and improved oil pressure at high operating temperatures . It is also suitable for gearbox applications where an SAE 30 oil is specified . CASTROL CLASSIC XXL 40 For Pre - 1950 Cars - and Pre - 1970 Motorcycles . Castrol Classic XXL 40 is a traditional , low detergent , performance monograde SAE 40 mineral oil . It is particularly suitable for Pre 1950 Veteran , Vintage and Classic Cars where an SAE 40 engine and gearbox lubricant is specified . Castrol Classic XXL 40 is recommended for many single and multi-cylinder Pre 1970 Classic motorcycles for engine and gearbox lubrication . CASTROL CLASSIC GP 50 For Pre - 1950 Performance Cars and Pre - 1970 Motorcycles . Castrol Classic GP 50 is a traditional low detergent SAE 50 monograde engine oil , particularly suitable for Pre 1950 performance cars and classic motorcycles . Castrol Classic GP 50 offers excellent high temerature performance , excellent noice suppression and a very high level of engine wear protection CASTROL VALVEMASTER The best protection after lead Lead replacement - Petrol additive + Ultimate protection against valve seat recession + Protects your engine under all driving conditions + Keeps fuel system clean and provides excellent corrosion protection In 250 ml bottle - treats 250 litres Tested and endorsed by the Federation of British Historic Vehicle Clubs . This unique phosphorus based formulation provides the best possible protection against damaging metal to metal contact between the valves and the soft valve seats - the job currently done by lead . Without such protection your engine may experience valve burning , loss of compression and engine failure . CASTROL VALVEMASTER PLUS The best protection after lead Lead replacement - Petrol additive Plus Octane Boost + Ultimate protection against valve seat recession + Provides an octane boost to unleaded fuel - reducing knocking + Protects your engine under all driving conditions + Reduces the need to re - fume + Keeps fuel system clean and provides excellent corrosion protection In 250 ml bottle - treats 250 litres Tested and endorsed by the Federation of British Historic Vehicle Clubs . This unique phosphorus based formulation provides the best possible protection against damaging metal to metal contact between the valves and the soft valve seats - the job currently done by lead . Without such protection your engine may experience valve burning , loss of compression and engine failure . 
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