Porsche Classic is helping out, though, by introducing its own brand of motor oil for the demands of the company’s vintage, air-cooled engines. According to Porsche, modern, synthetic oils are ...

The FX730V is a 726cc V-twin, forced-air-cooled engine ... to help reduce oil consumption. If you're operating in sub-freezing temperatures, you might go with 5W-30 or 10W-30 instead.