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Old 15 Aug 2007, 06:31 pm
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Default Does a 2006 Acura TSX have to have 93 octane?

I have gotten info saying 91+ octane & above. Also, if you use a lesser octane performance will decrease. I want the TSX but with gas I don't want to put 93 octane. If it won't damage the engine or void the warranty I would love to have it. Any definate answers?
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Old 15 Aug 2007, 06:32 pm
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it will perform better with a better grade octane but use a lesser one and use a fuel injection cleaner about once a month, but it will not void your warranty. You cant prove what type of fuel you are using. And that is mostly a suggestion anyway.
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Old 15 Aug 2007, 06:34 pm
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You use the octane rating that the manufacturer recommends. The octane rating is the propensity of the gas to ignite under compression only. The lower the number, the lower the compression needed to ignite the gas. So the engine compression is measured and the proper octane to use is established based on the highest compression reading. If you use an octane lower than recommended, you run the risk of having the gas in the piston cylinder ignite before the spark, causing a knock and damaging your engine. If you use the same or higher octane, you will have no problems. Using a higher grade does absolutely nothing for you. Your engine will ignite the gas at exactly the same time regardless of octane rating if it's 91 or 93. You will only be paying more for gas than you have to. You will not damage your engine or void your warranty using higher octane, but you possibly might using lower octane.
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Old 15 Aug 2007, 06:35 pm
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cjones is wrong unless your engine has what is known as a knock sensor. Most vehicles with a knock sensor will indicate in the manual that you will get better performance with the higher octane but it is not required. The Honda odyssey is one of these vehicles.If the engine does not have a knock sensor, you can use the lower octane gasoline, but risk damaging the engine. If the manufacturer calls for 91+ octane, you must use the higher octane rating to minimize engine knock.The reason for the higher octane numbers is to reduce what is known as spontaneous ignition. For a car to run optimally, a flame front needs to be in the proper direction. Typically the flame front is in a radial direction away from the spark plug.However, with high compression engines (to get more power), gasoline in the cylinder can reach temperatures that will cause spontaneous ignition in various places inside the cylinder. These other flame fronts will collide with the flame front coming from the spark plug, and usually results in what is commonly known as Engine knock. This is the sound you hear then the flame fronts colliding with each other.The shock waves generated WILL cause engine damage and excessive wear over time.If you can afford a new 2006 Acura TSX, then the gasoline cost should NOT be a factor. Considering that 91 octane is typically only $.20-$.30 more per gallon, in a car like this, it will only amount to $3-$4 to fill up your tank as opposed to the lower octane gasoline. If it's the car you want, this additional $3 cost should not be stopping you. Even if you fill up once a week, you're only looking at $12 more a month?Get the car, put the good gasoline in it. Lifes to short to be cheap.OK, went to Acura site, it says recommended 91+ octane, performance lower when using lower octane. So this vehicle has a knock sensor to delay when the spark plug ignites ( retard spark). You can put what ever gas you want in it, it will just reduce performance but not harm the engine
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Old 15 Aug 2007, 06:35 pm
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I just went to an Acura Dealer here in Plano Texas. I asked the same question and the sale person said that it would work with regular unleaded. I then went online and found out the TSX is just the European version of Honda Accord. On the European website they didn't even bother to put the 93 rating on the 2.4 liter engine that the TSX has. So I guess you will experience no less in performance.Good luck.
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Old 15 Aug 2007, 06:36 pm
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We tried it and it runs a lot rougher on our Acure
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Old 15 Aug 2007, 06:42 pm
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The company researches and finds out that 93 is the best for performance but you can put in a lower kind.
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Old 15 Aug 2007, 06:42 pm
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Plain and simple answer. At 10.5:1 compression or so... 89 octane with some gas cleaner should be just fine
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