Put Amziol in both new vehicles and the mileage has gone up some.
The newer types have a tell in the dash that lest one know when it's time to change.
The 68 and the 63 will get the non synthetic oils but every thing gets the best filter one can get.
Back years ago i used Conklin oil and the engineers from Amzoil if theirs was better or worse.
They said that the only thing i could do to make it better was to get their oil filter system.
I do get it from the parts store in town.
