Castrol GTX is one of the most trusted engine oils. It is more than just oil. It is "Liquid Engineering" which protects against common problems such as sludge.
Adverse driving conditions, such as every day stop-start traffic, adverse weather conditions and extended drain intervals, can lead to the build-up of a thick, tar-like substance called sludge. The build-up of sludge is not immediately visible, however, damage can occur to your engine and performance can be reduced.
Protect your car from harmful sludge build-up with Castrol GTX.
Castrol GTX 15W-40 A3/B3 is suitable for use in petrol and diesel engines where the manufacturer recommends an engine oil to ACEA A3/B4 or API SP or earlier specification.
GTX 15W-40 A3/B3 is also approved for use in VW and Mercedes-Benz vehicles requiring a 15W-40 engine oil with specifications VW 501 01/505 00 or MB 229.1