[Rodrelic]

I am old school, my opinions are from real life hands on
BS or not I have seen pennsylvania crude in my hand, clear, greenish Blue fluid very parrifin base. Non detergent in a crappy old motor will leave greasy residue
My old LTD had a stack of Texaco stickers on it, the valve covers were full of crusty crap, I guess mineral based lube.
Love the good oil produced in NY/ PA, wax is better than crust IMO, I cannot get a grip on new synthetics although I am forced to comply on my normal truck
But the flatheads get valvoline 40, no regrets