I've been running Mobil 1 Extended Performance in my vehicles and am coming up to my 10k OCI. I've always defaulted to Mobil 1 but honestly don't have any bias to any. I was doing some research and saw this that painted Mobil 1 in a bad light:
http://www.amsoil.com/lit/g3115.pdf
(four ball wear test)
This one showed better but is older:
http://www.synthetics.com/amsoil-and-mobil-1-comparison-tests.html
I know tests can be "tailored" or flat out unsubstantiated and wanted to get recommendations from you guys over recommended 10k/1year OCI capable synthetic oils. Cost and meeting recommended specs may be the final factors in the end. I'm looking at the 5w20 (or 0w20) & 5w30, north cal area, 5w20 for vehicle that drives highway and 5w30 for the one that is city/highway. Ordered preferences and reason would be nice. Thank you all in advanced.
http://www.amsoil.com/lit/g3115.pdf
(four ball wear test)
This one showed better but is older:
http://www.synthetics.com/amsoil-and-mobil-1-comparison-tests.html
I know tests can be "tailored" or flat out unsubstantiated and wanted to get recommendations from you guys over recommended 10k/1year OCI capable synthetic oils. Cost and meeting recommended specs may be the final factors in the end. I'm looking at the 5w20 (or 0w20) & 5w30, north cal area, 5w20 for vehicle that drives highway and 5w30 for the one that is city/highway. Ordered preferences and reason would be nice. Thank you all in advanced.