Castrol Classic Oils has announced the reintroduction of an iconic original premium engine oil for younger and modern classics – Castrol GTX.

Widely remembered as the oil that popularised the Liquid Engineering slogan, Castrol GTX is a premium 10W/40 mineral engine oil specifically developed to meet the day-to-day motoring needs of vehicles built between 1978 and 1993.

Cars from the late 20th Century are now highly collectable among the next generation of classic enthusiasts aiming to experience the cars that were unattainable in their youth.

After two years of painstaking research, Castrol Classic Oils has responded with the reintroduction of Castrol GTX Classic 10W-40. Using the latest modern additives matched to the engine technology of that era, this full mineral formulation offers exactly the same balanced, period-correct anti-wear and anti-corrosion additives to equal or exceed the specifications required by each vehicle manufacturer.

The result is a lubricant ideally suited to most contemporary engines: petrol or diesel, naturally aspirated or turbocharged, and with or without a catalytic converter.

Castrol GTX Classic 10W/40 can be purchased through your classic marque specialist or online at Castrol Classic Shop (, where customers will find links to Castrol’s helpful oil finder tool and period-perfect merchandise range.