Can I use regular gas in my 2008 Lexus ES350?

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Old 05 Jul 2011, 02:54 pm   #1 (permalink)
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Default Can I use regular gas in my 2008 Lexus ES350?

Just bought it. Lexus Certified, 35,000 miles. Have never had problem with regular unleaded in other cars. I know it will cost me a little in gas mileage, but not enough to equal cost difference between regular and higher grades of gas.
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Old 05 Jul 2011, 03:10 pm   #2 (permalink)
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Oldster,































Although the ES350's owner's manual recommends that you use premium unleaded I have yet to see anything other than anecdotal evidence that suggests that it's an absolute requirement. One of the primary reason why many manufacturers recommend premium for specific vehicles is because these cars have engines with high-compression; therefore running fuel with an octane rating less than 91 would increase the chance of getting pining or pre-detonation in the engine. Most new cars- your ES350 included- have knock-sensors and other electronics that will automatically retard the ignition timing if a lower octane fuel is detected. This prevents any pinging from occurring.































In summation, if you aren't overly-cautious or anal retentive about your Lexus then I propose that using regular gas isn't detrimental to your car's operating system.































www.lexuspartsnow.com
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Old 05 Jul 2011, 03:24 pm   #3 (permalink)
El
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You can but performance will drop by at least 10%
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Old 05 Jul 2011, 04:24 pm   #4 (permalink)
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1. You bought a certified Lexus, you probably dropped around $25K or so, maybe a little more. Premium gas costs about $0.25/gallon extra, an ES350 gets about 24 mpg in combined driving. Assume you drive 12,000 miles per year. Doing that math and crunching the numbers, that means premium gas will cost you an extra $2.40/week. If you even have to ask, and the extra $2.40 a week is even a consideration for you........you bought the wrong car. What's your car payment again? Why the hell would you even consider doing anything other than what the manufacturer recommends over $2.40/week, given what you just paid?































2. Lexus specified premium. Will the car instantly stop working if you run something else? Of course not. Manufacturers know consumers like cheap gas. Do you think Lexus engineers would have specified premium if they didn't think the car would run better with it? Who are you going to choose to believe? The engineers who designed the car, or some random dude on Yahoo Answers?































You just dropped a lot of cash on a nice car. Treat it with respect and protect it.
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Old 05 Jul 2011, 04:39 pm   #5 (permalink)
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You can only use what the owners manual calls for without damaging it.































I suggest buying a Cadillac next time.
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Old 05 Jul 2011, 05:09 pm   #6 (permalink)
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What kind of "problem" were you expecting? It's just gas it's not going to explode if you give it regular. It is, however, going to perform less efficiently and very possibly affect the life of your engine in the long run. Lexus doesn't see a dime from the gas station. If they say to give it premium, then give it premium.
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