Here's 4 oil samples
The top is Amsoil 5w30 5500 km
2 is Royal Purple 15w40 8000 km
3 is MC 15w40 5000 km
4 is Texaco Ursa 15w40 5000 km
2 syns and 2 dino's, which is better? All seem pretty close.
Just for anyone that was wondering, and if you can figure the chart out