T-3 vs t-4 oil

[Waterloo]

They changed the additive package in the new oil, supposed to be more friendly to these new junk motors and emission systems. Get this, https://amzn.to/2LkvO3F It will make up for the missing additives. I use it in my CM-871, have for quite awhile, on Rawze's recommendation. This can also be purchased at your local NAPA store and maybe some Walmart stores. I dump the entire jug in at every oil change. Half a jug in the winter.