Using oil with high zinc for your classic car plus Grand National oil change

It is important to use the proper motor oil in older vehicles with a non roller valvetrain and flat tappet camshaft.  There are a few options out there for oil and ZDDP zinc additives.  We switch the GN to Amsoil in search of better oil pressure.  Let's see how it goes...

Links to products used:

https://www.amsoil.com/p/z-rod-10w-40...

https://www.wixfilters.com/

https://www.amazon.com/Hopkins-FloToo...

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• #autos_vehicles
• #amsoil
• #buick_grand_national
• #high_zinc_oil
• #oil_change
• #38_liter_turbo_v6
• #turbo