340 6 barrel engine oil

[mezmerized1970]

What's the best oil for my 340/6 in my AAR?

[Cuda_mark]

I use Brad Penn 10-40 in all of my older engines.

[Brads70]

I also use Brad Penn but thicker for my engine combo 20w-50

[benguin]

With my flat tappet cam, and relatively leisurely/infrequent use, I'm using Valvoline VR1 (branded for "racing and classic cars") synthetic with a bottle of ZDDP supplement- both are hopefully to ensure a high enough zinc level to keep the wear to a minimum.   I had used Mobil 1 successfully for many years, but the declining zinc content in most of their blends didn't inspire a high level of confidence.
  Ben

[erik70rt]

I really like (and use) the Driven HR5 Hot Rod motor oil.  Added ZDDP and great for storage with rust inhibitors.

[Skdmark]

I just switched to Valvoline VR1 synthetic 10w-30 a month ago based on reviews and recommendations.
Brad Penn would be my alternative choice.

[mezmerized1970]

Brad Penn semi-synthetic?

[Chryco Psycho]

Sure as long as it has the zddp formula for older flat tappet cams
Joe Gibbs is another option