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Oil for Your Classic: What you need to know - by Carl Heideman

This article was sent via e-mail by my classic car insurance company, thought a few other folks have seen it and may wish to discuss it.

Link:
Classic Car Oil - Classic Car Motor Oil Company | Hagerty Articles

This part I find interesting:

Quote:

Race oils have a good balance of ZDDP and detergents, but lack the anti-corrosion additives that are critical to keep internal corrosion low in little-used classics.

Would this mostly apply to cast iron engines, and not magnesium and aluminum engines?

Interesting that they reference Brad Penn, which seems to be a popular choice for older Porsches. Didn't Porsche previously approve Mobil 1 0W/40 for use in all of their vehicles?