For car use, a high-quality carnauba wax is often recommended for its durability and deep shine. Alternatively, synthetic waxes offer long-lasting protection and are generally easier to apply.  
Use only the highest-quality liquid waxes—you can rest assured that they will protect your car while still bringing out the exterior's best look. Liquid wax is the best option for drivers who want a great look but do not want to have to consistently reapply the wax.
 
What type of wax is best for your car?

Types
Liquid Waxes. Good for cleaning, gloss, and durability. But they can be more difficult to apply evenly and buff out. ...
Paste Waxes. Good for ease of application. ...
Spray Waxes. Good for new cars with excellent finishes.

Are liquid car waxes any good?

Thanks to the introduction of synthetic polymers like silicone oxide and genuine graphene, the strength of many of today's liquid waxes is on par with that of most pastes. So then, why choose a paste wax? If you're looking to create the most beautiful, eye-popping shine, we'd recommend a paste over a liquid wax.
 
Spray wax at a car wash does provide a little protection for the paint and adds a bit of a shine. It also tends to rejuvenate any remaining wax. The downside of spray wax is that you are also applying wax to the windows

How long does liquid car wax last?

If it's liquid or synthetic wax, the effect fades away sooner. This results in a reapplication after every 6 to 8 weeks. No matter how great the results of car wax are if you really want to make your vehicle stand out and shine brilliantly, opt for a ceramic coating instead.