20W-50 Oils
Our 20W-50 engine oils. Your handbook gives the grade and specification your engine needs.
Q 20W-50 SL/CF
A mineral-based engine lubricant formulated using updated additive technology and high-quality virgin base oils.
Q Diesel 20W-50 CF-4/SG
A multi-grade diesel engine oil for heavy-duty diesel engines.
QT Protect 20W-50 SG/MA2
A mineral multi-grade engine oil, designed using updated additive technology and high-quality base oils to meet the requirements of older four-stroke motorcycle engines.
What 20W-50 means
20W-50 is an SAE viscosity grade. The first number, followed by W for winter, shows how easily the oil flows when cold: the lower the number, the faster it reaches the engine at start-up. The second number shows how thick the oil stays at normal running temperature: the higher the number, the thicker the oil.
So a 20W-50 flows more easily from cold than a 25W-50, and is thinner when hot than a 20W-60.
Use a grade your car's manufacturer lists, with the specification it asks for as well: oils of the same grade can meet different specifications.
More in our guide to what the numbers on engine oil mean.