I told my wife the same thing. Considering I keep mine 8 years or longer on average, I sure don't plan to risk it. Lexus automobiles that do not specify a higher-grade octane for optimum performance will run just fine on 87 or 89 octane. But people some recommend using 91 premium for better performance and engine life. They use the exact same engine as a Lexus and they all have a 10. You will probably get a minimal better gas mileage from thge premium but you need to weigh that with the cost difference. However, in others manufacturers recommend premium for optimum performance.
So who knows why Lexus rates theirs for premium gas. Between the two cars i totaled 100,000 miles. Then try a couple of tanks of the next higher rated gas. All modern cars have computers that monitor fuel grade and knock, and will! Lincoln All versions of the happily run on regular-grade fuel, from models equipped with the 2. If premium fuel is not used, performance will decrease.
I have not seen any posts on this topic before and would appreciate some tecnical as well as non-tech replys. The Genesis G80 sedan is another premium four-door. The only engine offered in this luxury crossover is — surprise, surprise — a 3. I guess it depends on how long you plan to own the car. This keeps the gas in my tank at an average of 91 octane, which is what Lexus recommends. Luckily for owners, several versions of this car will run on 87-octane fuel. The car never pinged, started on first button push and made me happy every day.
I cannot explain why, but on the highway, I got an improvement of 2-4 mpg while using Premium. You should use the lowest rated gas that gives you good performance. Lately Lexus has dropped to recommending regular and so did the performance specs. One has a few miles short of 100,000 miles on it and runs great. I have several cars that are supposed to use premium and I have used regular in them all consistently.
I first used 93 octane to fill up the tank when I bought the car. Any time there is a question about the specific needs of your car, always go to the owner's manual. Try a tank or two of regular and keep track of mpg, performance, and any 'pinging' noise. Sounds pretty much like our old 98 Camry V6 -- its owners manual says regular fuel is acceptable but that there is a slight performance increase if premium fuel is used. There are warm and hot engines. Hot engines work at higher temperatures in their chambers.
And before onsidering Premium fuel, I would make sure you use synthetic oil instead of dino oil. Higher octane gasoline facilitates explosion and therefore provides better acceleration. Luxury is the antithesis of austerity. Not much, and you won't notice the difference. But not everyone will believe this. Engines with higher compression ratios are specifically designed to run on fuel with greater octane.
I guess it depends on how long you plan to own the car. If your owner's manual indicates an octane level of 91 or higher, it is safest to adhere to the manufacturer's recommendations. And why would you need that difference, anyway? The manual says to use 91 octane. The cost for higher-octane fuel is not insignificant but could potentially balance out in mileage and performance. Most mechanics agree that there is little performance difference between 87 and 89 grade octane gasoline. This leads to lower performance and lower mpg. Interestingly, many Lexus models are based on shared platforms with Toyota equivalents.
For older models, please consult your under the Vehicle Specifications section for more information on fuel requirements and recommendations. Because of the computer, no damage to your engine will occur. A knock sensor can adjust the timing for different grades of gasoline. Examples are powered by a 3. If the engine senses knock it will! The most efficient version averages 21 miles per gallon. It doesn't do much else.