The Ford Barn

Werner · 02-07-2019, 03:05 PM

Hello.

I am not sure if I have understood the core question correctly.

For vintage cars, a low viscosity can have the disadvantage that the shaft bearings leak leaking oil. Otherwise, a multi-grade oil is always better than a single range.

The most important is the API classification. Because of the non-ferrous metal compatibility. You should not go higher than "SC". Petrol engine oil API SC has anti-corrosion inhibitor, detergent cleaner, HD heavy duty additives. That is enough!

However, the oil still has to be changed many times (max. <1000 miles) because it runs without a filter and only then can the abrasion chips be taken out.

02-07-2019, 03:05 PM	#14
Werner Senior Member Join Date: Jan 2019 Location: Germany, near Aachen Posts: 1,312	Re: 30w oil Hello. I am not sure if I have understood the core question correctly. For vintage cars, a low viscosity can have the disadvantage that the shaft bearings leak leaking oil. Otherwise, a multi-grade oil is always better than a single range. The most important is the API classification. Because of the non-ferrous metal compatibility. You should not go higher than "SC". Petrol engine oil API SC has anti-corrosion inhibitor, detergent cleaner, HD heavy duty additives. That is enough! However, the oil still has to be changed many times (max. <1000 miles) because it runs without a filter and only then can the abrasion chips be taken out. __________________ Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version