Castrol Edge w/Syntec Synthetic Motor Oil - Grades:5W50

Engines that call for 5W-50 oil typically run hard — high-performance builds, turbocharged setups, and vehicles driven in extreme temperature swings. Castrol Edge 5W-50 is a full synthetic oil built for exactly that kind of duty, using what Castrol calls Fluid Titanium Technology to resist viscosity breakdown under stress.

A 5W-50 weight gives you the cold-start flow of a 5W oil with the high-temperature film strength of a 50-weight, which is why it shows up in owner's manuals for performance vehicles from Porsche, BMW M-cars, and certain Ford Mustang models. Castrol claims this formula is three times stronger against viscosity breakdown compared to leading full synthetics, meaning it holds its grade longer through high-heat, high-shear conditions.

This is a single quart bottle, so you can buy exactly what your engine needs or keep one on hand for top-offs between changes. If your vehicle specifies 5W-50, this is a solid full synthetic option from a well-known brand.