How many quarts of transmission oil does a 1978 datsun 620 need?

A 1978 Datsun 620 typically requires about 3 to 4 quarts of transmission oil, depending on whether it's a manual or automatic transmission. For the manual transmission, around 3 quarts is usually sufficient, while the automatic may need closer to 4 quarts. Always consult the vehicle's owner manual for the most accurate specifications.