Originally Posted by sgoldste01
I don't know if this is true, but I've read on this forum that people say there's not much difference between OE and XL, so you might as well save money and buy OE. Signature, on the other hand, is very different, and might justify the extra cost.
Only a UOA on the Signature could prove that it lasts enough longer than OE to be worth it. I look forward to seeing the results from your Signature UOA.
I tried xl on my first oil change, it was ok, on paper it is pretty similar to oe