The original Castrol GTX 10W40 'Liquid Engineering' is back. This iconic engine oil originated in the 1960's and became hugely popular in the 1970's and 1980's and now it is available once more for your classic car.Ideally suited to vehicles from 1978 to 1993 which require a 10W40 engine oilHigh quality mineral oil with ZDDP additives for superior wear protectionAnti-corrosion and anti-sludge properties keep the inside of your engine cleaner for longerCompatible with vehicles with or without catalytic convertersCastrol GTX classic is a mineral based SAE 10W40 engine oil which has ZDDP (Zinc Dithiophosphate) which boosts the oils anti-wear protection even on cold starts. It also includes additives to reduce corrosion and sludge build up to keep the engine internals clean and ensure the oil is reaching the parts it needs to. It is ideally suited to engines from the late 70's to early 90's either naturally aspirated or turbocharged and is compatible with catalytic converters.Supplied in t