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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: hll7575 (Jun 25, 2007 11:23 am) It is the knock sensor that allows you to run your TSX with 87 or 89 octane fuel without damage. Unfortunately, a side-effect of running an engine with retarded timing is not only reduced horsepower, but also reduced fuel economy. If 91 octane fuel yields an average of 25 MPG, you will only need 50 (12 gallon) fill-ups to cover 15,000 miles. At $3.20/gallon, you will pay $1920. If you drive under the same conditions on 87 octane gasoline and retarded ignition timing causes a 2 MPG average drop in fuel economy (23 MPG average), you will need 54 (12 gallon) fill-ups to cover 15,000 miles. At $3.00/gallon, you will pay $1944 - an additional $24. Your car is designed to perform best on premium fuel. Premium fuel also often contains added detergents that keep your engine cleaner and healthier longer. Premium fuel costs only $0.20/gal more than regular fuel. Do the math.
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Replying to: fedlawman (Jun 25, 2007 3:03 pm)
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Replying to: nj2pa2nc (Jun 25, 2007 3:28 pm)
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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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