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Acura MDX gas questions

23 messages,  Last post on Aug 24, 2008 at 10:43 PM

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What is this discussion about? Acura MDX, Fuel System, SUV

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#21 of 23 Re: Acura MDX: gas octane [upstatedoc] by dave_nh Jul 24, 2008 (1:40 pm)
Replying to: upstatedoc (Jul 24, 2008 6:26 am) My guess (unfortunately, I did not keep all of my receipts) is that I probably saved enough over the roughly 8,000 miles to pay for our dinner for two in Ted's Montana Grill in Colorado Springs. Best Bison meat I have ever had!!   I notice that in our area (Southern New Hampshire), lately, prices are dropping and the difference between premium and regular is shrinking. I will go back to Premium.   As an aside, I also own a 2001 Mercedes E320 4-Matic. The drop in mileage from using premium to regular is significant to the point where it is more expensive to use regular than premium. Performance also drops off. Clearly, MB squeezes as much out of their engine designs as possible.   Dave Replies to this message: sfbayer (Jul 24, 2008 3:19 pm)
#22 of 23 Re: Acura MDX: gas octane [dave_nh] by sfbayer Jul 24, 2008 (3:19 pm)
Replying to: dave_nh (Jul 24, 2008 1:40 pm) Hi Dave,   Thanks for the information. I just brought a 2008 MDX three weeks ago. I have been using only 91 octane gas and has been able to get 18 MPG around town and 23 MPG highway.   The price difference between lowest grade (87 octane) to highest grade (91 octane) in California is usually $0.20 which is less than 5% saving. It is clear that the best option is to use Premium gas as there is a 9% reduction in MPG by using lowest grade (87 octane) based on your average 22 MPG using Premium and 20 MPG using 87 octane.
#23 of 23 Re: Leaded fuel for MDX 2004 [sarlek] by hotrodsurplus Aug 24, 2008 (10:43 pm)
Replying to: sarlek (May 04, 2008 4:16 am) Additives will not help this issue. The lead will render the catalytic converter junk in very short order (it will coat the catalyzing medium). You may be able to remove the catalytic converter(s), but ONLY IF there are no oxygen sensors downwind of the cats.   If the MDX has o2 sensors downwind of the cats and you remove them, the ECU will cause the engine to run poorly (generally lean or too little fuel which will reduce power significantly and destroy internal components).

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