I am now using Mobil1 and XL-7... and if you really want I have a few XL3 & XL7 bottles sitting in my garage that I need to get rid off..
but I am not happy with that combo.. this winter it wasn't the best for me.. in the summer and when its warmed up its fine.. but when cold crappy..
I am switching to Royal Purple Synromax before this winter..
hope that helps.
Cheers