To find the correct oil, you need to:
1. Identify your engine: Look for a tag on the engine block itself or consult your owner's manual (if you have it). Common engine choices for a '64 Thunderbird include:
* 289 cubic inch V8: This was a very common engine.
* 390 cubic inch V8: A larger, more powerful option.
* 300 cubic inch inline six-cylinder: Less common but possible.
2. Check your owner's manual (if available): The owner's manual will specify the recommended oil type, viscosity, and quantity.
3. Consult a classic car resource: Websites and forums dedicated to classic Ford Thunderbirds, or even general classic car maintenance, will have information on recommended oil types for your specific engine.
Once you know the engine, you can determine the oil:
For these older engines, you'll likely need:
* SAE viscosity: This will be something like 20W-50, 10W-30, or even straight 30 weight. The exact viscosity will depend on your climate and engine. Hotter climates generally call for higher viscosity oil. Do NOT use modern energy-conserving oils. These oils can have additives that are not compatible with older engines.
* Oil type: Look for conventional oil, not synthetic. While some may use synthetic blends, sticking to conventional is generally recommended for these older vehicles.
* API rating: The API rating (American Petroleum Institute) is an indication of the oil's quality and properties. Older engines may benefit from oils with an older API rating, but consult your owner's manual or a classic car resource for specifics.
In short: You can't get the correct oil without knowing the engine. Finding the engine details is the first and most important step. Then, use that information to research the appropriate oil type and viscosity for your 1964 Thunderbird.
