What kind of oil does a Chevy Nova 1973 use?

A 1973 Chevy Nova's recommended oil type depends on the engine it has. There were several different engine options available that year. To know for sure, you need to check your owner's manual or the sticker under the hood (if still present).

However, generally speaking, for that era:

* Most likely: The recommended oil would be a SAE 20W-40, likely a conventional oil. This was a common grade for cars of that age.

* Possibility of SAE 10W-30: Depending on the climate and the engine, a lighter 10W-30 might have also been recommended.

* Oil type: It likely called for a conventional oil, not synthetic. Synthetic oil wasn't as prevalent then.

Crucially: The owner's manual will specify the *correct* oil type and viscosity for your specific 1973 Chevy Nova engine. Using the wrong oil can damage your engine. Consult the manual or a reliable resource that lists the specifications for the particular engine code in your car.