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Sedans Acura TSX Acura TSX
5068 messages, Last post on Nov 17, 2008 at 10:59 AM
You are in the Acura TSX Forum. Your Hosts are pat & karens
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Replying to: fedlawman (Jun 25, 2007 7:26 pm)
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Replying to: nj2pa2nc (Jun 26, 2007 2:09 am)  I'm just putting out information that might help others decide whether to go with regular or premium. Drive on...
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You only need 91 octane if you drive and push the engine in your car closer to its operational limits like: - High altitudes - Close to max weight - Continuous High speeds (+75 mph) - Max accelerations - i-VTEC engagements - Hilly/mountainous terrain If you drive the TSX like a Blue haired old lady in a Buick, then regular is perfectly fine. There really will not be much of a difference in gas mileage UNTIL you up the performance. Then you will see a drop in performance and mileage using 87 octane. The key to using lower octane is to drive the car at about 50-75% of its capabilities to get the benefits of saving $2 at the pump at each fill-up. |
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Replying to: fedlawman (Jun 25, 2007 3:03 pm) Certainly people should do what they feel is best for them, but I've never found a reason to think that an automobile manufacturer doesn't know best how its cars should be treated.  Hey hll7575 - where are you in Virginia, if you don't mind me asking? I'm in Norfolk. 
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Replying to: fedlawman (Jun 26, 2007 5:57 am) |
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This was all highway no dealer with me, 07 auto TSX. Boy I am still up in the air about this car. Thought from about 50 to 80 car was slow, could not get it to kick down into a lower gear, perhaps did not press hard enough on the pedal, not sure. Did not mess with the autostick. Thought highspeed merge on a short onramp was also slow. Bumps at high speed were rock hard. I really love the outside looks and the quality interior of this car,especially the blue dash lights. Like the size/price/options and it has a real key. Drove back to back with an 07 3.5 Altima, which had effortless power, no merge problems. This is difficlut, may need to also wait for the 08 Accord. Old Mike
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Replying to: mf15 (Jun 26, 2007 7:11 am) |
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Replying to: fedlawman (Jun 25, 2007 3:03 pm) However, it is important to realize that such an adjustment will need to be made only under a subset of the operating conditions. In other words, many drivers will not see these conditions. Unless we know what the subset is, and what the actual effects are, we can't say for sure what the overall affect on fuel economy will be. Lower octane gas actually contains more energy per volume, so it is possible that for most drivers under most operating conditions, that they will see a fuel economy increase, but I don't have enough info to make that assertion. Where I live at ~5000 feet above sea level, 87 octane gas would likely never force the engine to retard the timing. In fact, where I live, they sell 85 octane gas as "regular." 87 is the mid grade and 91 is "premium".
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Replying to: tradscott (Jun 26, 2007 9:09 am) The lower energy by volume is what allows the compression ratio to be bumped up for higher performance. With a high compression engine, you litterally get "more bang for the buck" with 91 octane gas. In my opinion, If I wanted to save 20 cents at the pump and spent the vast majority of my time on the highway, I would have saved $10,000 and bought an Accord.
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Replying to: fedlawman (Jun 26, 2007 11:47 am)
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