Ernie's cost saving argument is pretty much bogus.
But the
zinc/phos availability is everywhere now. Every car catalog I get now seems to have their own "house
oil" that is "extra rich in
zinc & phos" -- I think the Summit catalog that came yesterday was the most recent with their own house brand. If you run the right
oil, and if you haven't wiped a lobe in the first 1000 miles or so, your SFT will be around a long, long time.