Amsoil Recommendation

[The Spaceman_imp]

As far as additives for these new synthetics is probably not a good idea as a lot of chemistry went into the manufacture of these oils.
Why try and change what they created?

That's a great question Mr. Jangles. You see, Bardhal's exclusive chemical formulas sink deep deep down into your engine's metal and seals, providing molecular-level surfactant action beyond what any conventional or synthetic oil can achieve. With Bardahl, you'll ride with confidence knowing that you've poured in real engine repair and maintenance, right from the Bardahl bottle.

So you are telling us that Bardahl is a soap?

Move along sir, you're crowding out the customers. There's nothing to see here.