Yeah, as said, I would only use something like that if you've got a bad knock or something and want to put off a rebuild.

I've got 160k on my LN3. Was using Mobil 7500 and changing every 4500 or so miles. But wiht the */C, I'm using Mobil 1 now and changing about at the same interval.

All you need is M1 syn............................................... .........

Yup. There'* no such thing as "mechanic in a can", or magic snake oil.

These cars, quite frankly, will probably run over 250,000 miles on generic dino juice as long as you use a quality filter and change every 3000.