Premium gasoline? You’re wasting money unless you vehicle requires it, AAA says.

Is premium worth the price? AAA tested vehicles to find out.

Do you buy premium gasoline when you don’t need to? Some motorists think it might help their vehicle’s performance, even if it isn’t required.

AAA released new research Tuesday that shows paying-up for premium –91/93 octane vs. 87 octane for regular — may not be worth the extra money, unless your vehicle absolutely requires it.

“Sometimes consumers think they are giving their vehicle a boost by buying a higher-grade gasoline than what is required,” said AAA spokesman Mark Jenkins. “AAA already proved that there is no benefit to using premium gasoline in cars designed to run on regular. Now we can confidently say that unless the vehicle manufacturer requires it, or you drive in demanding conditions, motorists who buy premium are wasting money at the pump.”

Some motorists may consider the additional torque and horsepower to be worth the extra money. Individual drivers – particularly if their driving style can be described as “spirited” – may find an improvement in vehicle driving performance for off-the-line acceleration, highway passing, hill-climbing when loaded with luggage, or towing a trailer; and may determine that their personal driving benefits from the use of premium gasoline.

While some vehicles are designed to run on premium octane gasoline, others simply recommend it. So AAA set out to determine the effects of using premium gasoline in vehicles that recommend it, and whether the benefits in fuel economy and horsepower are worth the higher price at the pump.

The Price of Premium

  • On average, this year in Florida, there has been a 20-25 percent  (57 cent) price gap between regular and premium octane fuel ($2.37 vs. $2.94)
  • On Monday, the state average price for a gallon of regular was $2.41 vs. $3.00 for premium. (Click here to view today’s averages)
  • In Palm Beach County on Tuesday, regular averaged $2.53, while premium was $3.15.

Putting Premium Fuel to the Test

  • AAA tested a variety of vehicles that recommend, but do not require the use of premium (91 octane or higher) gasoline.
  • A series of tests were conducted to determine whether the use of premium gasoline resulted in:
    • Improved fuel economy
    • Increased performance (horsepower)
  • Although AAA has already proven that these vehicles are unlikely to see any benefit from using premium gasoline during typical city or highway driving, a combination of laboratory and on-road tests were performed to simulate extreme driving scenarios such as:
    • Towing
    • Hauling cargo
    • Aggressive acceleration
  • Test vehicles included: Ford Mustang GT, Jeep Renegade, Mazda MX-5 Miata, Cadillac Escalade ESV, Audi A-3, and the Ford F150 XLT
  • Key Findings
  • Most vehicles showed a modest improvement in fuel economy and performance.
  • Fuel economy for test vehicles averaged a 2.7 percent improvement. Individual vehicle test result averages ranged from a decrease of 1 percent (2016 Audi A3) to an improvement of 7.1 percent (2016 Cadillac Escalade).
  • Horsepower for test vehicles averaged an increase of 1.4 percent. Individual vehicle test result averages ranged from a decrease of 0.3 percent (2016 Jeep Renegade) to an improvement of 3.2 percent (2017 Ford Mustang).
  • Premium gasoline costs 20-25% more than regular.
  • The fuel economy improvements recorded during AAA testing do not offset the potential extra cost to purchase premium gasoline.
  • Click here to read the full report


Premium Gas – Recommended vs. Required

  • Last year, nearly 1.5 million new vehicles sold in the United States recommend, but do not require, premium gasoline.
  • The trend toward recommending or requiring higher-octane fuel continues to rise as manufacturers work toward meeting stringent CAFE (Corporate Average Fuel Economy) standards.

“By offering a choice, automakers can market modest gains in fuel economy and performance, and car buyers are less likely to hesitate about buying the vehicle, because their operating costs will be lower,” Jenkins continued. “Unfortunately, by only recommending premium fuel, the engine cannot be calibrated to take full advantage of the higher octane, because it also needs to perform adequately with lower octane (regular) fuel. Therefore, the fuel economy and performance gains are only minor.”

AAA Recommends

  • Drivers of vehicles that require premium gasoline should always use it.
  • For those vehicles that do not recommend or require premium gasoline, AAA suggests drivers opt for the lower priced, regular fuel.
  • Any vehicle that makes a “pinging” or “knocking” sound while using regular gasoline should be evaluated by a AAA Approved Auto Repair Facility and likely switched to a higher-octane fuel.
  • AAA urges drivers who use premium gasoline to shop around for the best price, as it could vary dramatically between gas stations in any given city.
  • The AAA Mobile app, is a free tool to help drivers identify the least expensive premium gasoline near them.

Higher Octane Does Not Mean “Higher Quality”

  • AAA found no benefit to using premium gasoline in a vehicle that only requires regular-grade fuel.
  • In a study released last year, AAA found that consumers wasted nearly $2.1 billion dollars fueling vehicles with higher-octane gasoline.
  • Drivers seeking a higher quality fuel for their vehicle should consider using one that meets Top Tier standards. Previous AAA research found it to keep engines up to 19 times cleaner.
  • The study noted the difference in fuel quality was dependent on the various detergent packages in gasoline, which vary by retail brand.

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