Should i use regular gas

The main difference between premium gas and regular gas is the octane rating. Regular unleaded gas is typically the cheapest gas to purchase, as it is the most common. Premium gas is typically the most expensive gas to buy. Some luxury car manufacturers and manufacturers of sports cars or foreign cars recommend higher-octane, premium gas to achieve the best engine efficiency. Double-check whether your car manufacturer requires premium or recommends premium gas.

Few car manufacturers suggest mid-grade gas. Diesel fuel has a much lower octane rating of 25 to You want to keep your car in good shape, so you may think splurging on a higher octane rating is better. When I use ethanol gasoline, my mileage drops into the 13 to 15 miles per gallon range. When using non-ethanol gasoline, my mileage goes up to the 23 to 27 mileage.

What about 85 octane? Which is the best gas for ur car if a mechanic tell u u get the high percentage for ur car to help clean gas line out. I thought that octane was gasolines ability to hold oxygen therefore at higher elevations where the air is thinner the gasoline cannot hold as much oxygen resulting in a lower octane rating. Is this correct? When your cars engine with carburetor is tuned for sea level driving, the gasoline octane rating should be determined on the compression ratio of the engines combustion chamber.

The carbureted engine will start to smoke black smoke, too much fuel and start running erratically! Old hot rodders such as myself always carry a case with different sized main jets, and stop before the erratic behavior begins. This is where you better have knowledge of how to disassemble your carb and reassemble it after changing jets.

You want less fuel and more air, then a timing light to retard your distributors spark a few degrees. Simple eh? What does change the octane numbers in your gas is sudden stops,and sloshing around in a tank without baffles or foam blocks to keep the gas from doing the Big Slosh!! I love my car and all of the tips and tricks that are on this site are very informative, thank you. This, in turn, can lower engine performance and increase emissions. Engines with a high compression ratio typically require higher octane fuel to achieve its intended level of performance, fuel efficiency and emissions.

While you might save money on gas, your car will be less powerful and fuel-efficient. This can make a huge difference in vehicles with available turbocharged engines. While older vehicles may be susceptible to engine knock when running on low octane fuel, modern ones are equipped with sensors to help prevent knock—and by extension, engine damage.

You might save money on gas, but in this situation, you get what you pay for. Research by AAA found that these vehicles saw a slight increase in performance and fuel economy using premium gas.

Depending on what and how you drive, commuters looking to get from Point A to Point B may not notice the difference or care. At the end of the day, it all comes down to your preference. Your car, your rules.