Sure hope not. I'm not a fan stop leak type products. Did you try using an engine flush cleaner in the engine, followed by an oil change? That would have been my first choice. You still have the oil baffle in the oil filler neck, right?
I'm not a fan of any type of a miracle-in-a-can either, but I was getting tired of dumping in $5.00 bottles of oil on every or every other tank (I use Valvoline semi-synthetic blend). But since a typical stop leak works on rubber seals, I figured at the least I can narrow down the culprit.
I know engines, I have built a few V8's in my lifetime, and I know the characteristics of leaks and such, but when this particular rig didn't show any signs of a leak (even though there was heavy oil consumption), this had baffled me to no end. Usually, with any type of leak, there are SOME signs given, i.e. wet parts, drip stains on the road surface, etc. But not this one. So this is telling me that the leaking is ONLY occurring while I am driving, BUT, there should still be some
sign of an oil leak left behind on something underneath. Also, if it was burning it off, the plugs and the exhaust would have signs of oil burning, but neither revealed any signs of oil burning. And at a quart every 250-500 miles, there would be a very strong evidence of heavy oil usage.