Journeydog;
Absolutly, you are ok with the green but you must use the additive and get the test kit.
Treat it just like a big diesel.
See what i mean, the statement made by the shop that istalled your engine has no idea about antifreeze.
Remember this, if you use the test kit, on ANY green a/f, brand new out of the jug, it will have the same result with your test strip, 0
Get the additive and the test kit, take care of your a/f and do some tests of your own.
Big trucking companys are going to the ELC for cost savings on the labor end.
Kent