Pablo, how come Amsoil doesn't make a Mack-Daddy 5w20 oil for folks that are intent on using the OEM specified grade? The XL is group 3, and some of us want to do extended OCIs with something more robust.
Given that many, many new cars call for 5w20, wouldn't it make sense for them to pony up for API certification on a group 4 or 5 5w20 instead of certifying the XL? Or at least give us a better 5w20. I realize that they offer the 0w20 good stuff. Is it so close to being a 5w20 as to be completely interchangeable?
What do you think?
Given that many, many new cars call for 5w20, wouldn't it make sense for them to pony up for API certification on a group 4 or 5 5w20 instead of certifying the XL? Or at least give us a better 5w20. I realize that they offer the 0w20 good stuff. Is it so close to being a 5w20 as to be completely interchangeable?
What do you think?