Premium fuel is better for your car and will increase its performance
Unless your vehicle has a high-compression and performance engine that runs hotter than most others, regular gasoline works fine. The cheaper 86 octane fuel still has to meet quality standards — it won’t actively harm your car’s engine. Higher octane gas includes cleaners and protectants to keep turbo-charged engines in better shape — think sports car types — and is more resistant to engine knocking.
Typically, cars that require more expensive, premium gas cost more to purchase themselves. Regular gas should suit the average-priced vehicle. Check your owner’s manual to see what your car manufacturer suggests.