Have a quick question, just to think about. I was looking at the Lucas bottle of break in oil. Zinc oil. I know this is for older engines, flat tappet, and such. But lets say you wanted to boost the ammount of zinc in an oil change on a newer vehicle. Not a lot, but lets say just maybe 2 or 300. Would it be a good idea to use a couple oz's for 5 qts of oil to get the levels up? The bottle says 1 16oz bottle for 5 qts of oil. I know this is for cars with no converter on them. But if you cut the ammount to a couple oz's would it hurt anything? The cost of the bottle is $14.00