<VV> One Other Brand of Oil

[Michael Mauro]

I've used the following with outstanding results: "...Valvoline™ VR1 Racing Oil's high zinc provides race-level protection for high performance engines on the race track and is compatible with passenger vehicles..." Designed exclusively for flat-tappet engines (has correct amount of ZDDP)... my 2-cents worth.
http://www.valvoline.com/our-products/motor-oil/vr1-racing-oil... 
Mike Mauro 

From: Steve Lovejoy <sal0311 at gmail.com>
To: virtualvairs at corvair.org
Subject: <VV> One Other Brand of Oil
Message-ID:
    <CAEQ6Yw8SKxpzR1PdOdy6sKTCqMrqmnwAfp=9zZtBF6pMBc-rOA at mail.gmail.com>

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I have had good luck with Joe Gibbs Oil.

https://www.drivenracingoil.com/dt50-5w-50-synthetic-street-performance-oil.html

>From their website:

DT50 15W-50 Synthetic Street Performance Oil

DT50 utilizes advanced mPAO synthetic base oils to provide protection for

high operating temperature turbocharged engines. Also ideal for Porsche and

Volkswagen air-cooled engines. Compatible with E85 and water/Methanol

injection. Viscosity typical of 15W-50.