15W-50 Oils
Our 15W-50 engine oils. Your handbook gives the grade and specification your engine needs.
Q 15W-50 SN Plus
A mineral-based engine lubricant formulated using updated additive technology and high-quality virgin base oils.
QT Supreme 15W-50 SN/MA2
A semi-synthetic multi-grade engine oil, designed to meet the requirements of modern four-stroke motorcycle engines.
What 15W-50 means
15W-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 15W-50 flows more easily from cold than a 20W-50, and is thinner when hot than a 15W-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.