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why use premium gas instead of regular

To find out whether using regular gas in a vehicle that recommends premium gas had any effect on fuel economy or acceleration, we evaluated two models: the 2015
four-cylinder and the 2016 V6. Each recommends but does not require that the owner put in premium gasБguidance found on the placard on the backside of their fuel-filler door and often explained in greater detail within the ownerБs manual. So long as you fuel the vehicle in accordance with the manual, you are protected by the powertrain warranty. In order to purge the cars of premium that could be in the fuel system, we drove them nearly dry, then ran through a full tank of regular gas before starting testing.

All tests were conducted following our stringent fuel economy test protocol, with consumption measured through an inline fuel meter. Both sedans achieved the same fuel economy when tested with regular fuel as with premium. During this testing, the cars felt and sounded the same; we did not experience any engine pinging or knocking noise in either car when using regular fuel. The owner's manuals indicate that you might notice a decrease in performance when running on regular, but our test results say otherwise. The 0-60 mph acceleration times were identical in the TLX and Maxima on regular and premium gas.

Regular unleaded gas typically costs about 15 to 20 cents less per gallon than premium. That can lead to a savings of $100 or more per year, depending on how often you fill up. In regards to the effectiveness of regular gas, the says there are no advantages to using premium gas in cars that donБt require it. The FTC states that using a higher octane on cars that donБt require it will not lead to better gas mileage or to the car running cleaner or faster. Your car ownerБs manual lists the recommended or required gas. БI myself feel that the auto industry has evolved to a point where regular octane fuel is fine, due to better quality and integrity of the fuel systems today,Б Griffin says.

БI only run regular fuel and never have had an issue. Б Phillip Reed, a senior consumer advice editor for Edmunds. com, a car shopping website, says with advances in technology, all grades of gas typically have plenty of additives to protect the engine. БToday, engine control systems can compensate for low octane by monitoring knock activity and adjusting ignition advance to avoid knocking,Б Reed. БThis sophisticated electronic capability effectively tunes the engine on the fly and gives drivers more flexibility in the grade of fuels that they can safely use. Б

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