45 year old engine I would go with either brad penn 20w50 free shipping from jegs or straight brad penn 40wt if your ambient temp when u start the car is above 60f. Reason for the BP is high
zinc and phosphorous. Once again any
oil is fine!!!!!! Nothing beats a straight weight outside a
synthetic.
QUOTE=saturnkk;1277011]So is 20-50 okay for a 45 year old Chevy 327 then? I had heard that as an engine ages, with niles, it is better to go with a "thicker
oil" to make up for the wear...[/quote]