It is possible to use an aircraft oil in an automotive gasoline engine, Aeroshell AD65 for example is an oil that could be used. This is a SAE 30w ashless dispersant oil to which you may have to, depending on camshaft type, add an extreme pressure additive. Zinc is the EP
additive in most auto oils. Also when using aircraft oil, more frequent changes are a good idea.
The use of aircraft oil was specified in the Chevrolet Power Manual back in the late 80's when running Chevrolet racing engines. I haven't seen a Chevrolet Power Manual in years, so I don't know what they recommend now.
Question is, unless you have a stockpile of aircraft oil in AD65 that is nearing its expiration date, or have a race car, why go to all the trouble and expense to use it in your car? I myself wouldn't use it in new or later model vehicles.
Now here's the disclaimer. If you use any oil in your vehicle which is NOT specified by the manufacturer, you're doing it on your own. They, the manufacturer, nor I am responsible for damage to your engine caused by using it.