The AMSOIL Z-Rod Series oil is very good for a lot of the engines in our Muscle cars. First reason is that is it contains the Zinc everyone is looking for (no need to add any additional Zinc) and secondly, the Z-Rod contains anti-corrosion inhibitors specifically for our engines because more often than not our cars are stored for long periods in winter or rainy seasons. Also, no need to add any "oil stabilizers" to any oil or any AMSOIL products. It only screws up the formula of anyones oil. The oil stabilizer mentioned in an earlier post is a 60 weight viscosity.
http://www.amsoil.com/shop/by-product/mo...oil/?=zo2011844
http://www.amsoil.com/shop/by-product/mo...oil/?=zo2011844
Tommy