Last post on Oct 21, 2013 at 11:49 AM
You are in the Honda Pilot
What is this discussion about?
Honda Pilot, Fuel Efficiency (MPG), SUV
#999 of 1186 Re: Octane and Compression [justaveragejoe]
Mar 03, 2010 (5:16 pm)
so your point is the engine with 10:1 compression doesn't need preminum 91 or higher..
If you look at 2006 MDX which has 3471 CC 10:1 compression, required 91 or higher.
Of course you can use octane 87 on Acura MDX, but you are going to loose some HP.. for normal drivers wouldn't probably notice.
I do believe Honda Pilot engine really need octane 91 or higher. because of the weight of the car, and engine.
#1000 of 1186 Re: Octane and Compression [kingfans1]
Mar 04, 2010 (9:46 am)
Yes, for 2006 you are correct and make a good point. Both the Pilot and MDX have the same compression ratio and displacement (I made a mistake in my prior post, I meant to show 3.471 Liter).
Yet the MDX gets a higher HP rating? I imagine the MDX engine computer was "tuned" to perform better than the Pilot because it is a premium brand of car (Acura vs Honda) and people expect more for the premium price they pay. This performance tuning, things like increasing the maximum ignition timing through programming of the computer, requires premium gas to prevent pre-ignition or "pinging" during hard acceleration. Thats when timing needs to be advanced the most. If an OBDII sensor detects pre-ignition because the octane is too low for the MDX, it will compensate by adjusting some engine controls, such as retarding the timing. Maximum performance would not be achieved.
But I don't think the Pilot can achieve more HP with premium gas because it was deigned and programmed to run on regular. I think the computer has its limits and as long as the gas is letting the computer run everything at optimum, then that's all she's got.
I set the timing in my old truck by manually turning the distributor cap. It also has a vacuum advance and centrifugal advance. These methods are primitive compared to computers but they helped the car run more efficiently. The specs for my truck call for 2 degree advanced. I can advance it up to 6 degrees before I get any pinging. I keep it at 4 degrees to prevent any pre-ignition that I can't hear. I have always run premium in that old thing.
Anyway, people should feel good about whatever they do. A lot of stuff is opinion (including my babbling) and folks should do the things that increase the enjoyment they get when driving their vehicles.
Edit: Hey, check it out. Post number 1000 in this thread.
#1001 of 1186 Re: Octane and Compression [justaveragejoe]
Mar 04, 2010 (4:42 pm)
I always fuel up my car with chevron 91. It always show 420 miles range at 2 different chevron gas station after fuel up.
today I fuel up with shell V-power, the miles range show 429. I will let you guys know if shell gas brand give me good mpg.
so far shell v-power is excellent brand. performance is great. no problems going up on the mountains ( 8000 feet ). the car breathe better.
#1002 of 1186 Honda Pilot Real World MPG
Mar 11, 2010 (7:36 am)
I sell Pilots and 87 is all you need. 91 octane is a waste as stated above the engine is designed for 87 and will not perform any better or different with 91. If you beleive it does it is probably because you have convinced yourself of it.
#1003 of 1186 Re: Octane and Compression [kingfans1]
Mar 11, 2010 (7:52 pm)
Every "miles to empty" computer I've ever seen calculates this based on MPGs over the last few hundred miles. Ford, Hyundai, Toyota. Hate to break it to ya, but that computer isn't analyzing the fuel and saying "yep, this gas feels a little better than the last stuff." It just means your driving style and/or how much fuel was in the tank meant mathematically, you'd get a little further on that tank.
I've read several different articles mentioning how the higher resistance to ignition of premium can be a detriment to your mileage. I don't disagree or agree; I'm no engineer.
#1004 of 1186 Re: Honda Pilot Real World MPG [kanatah0nda]
Mar 11, 2010 (9:21 pm)
Octane 91 like chevron, shell, brand name have more cleaning agents than 87. In the long run of using 91, it will maintain your engine max performance.
lets say you drive 15,000 miles a year. 20 mpg. regular vs preminum 91 difference is .20 cents. Using preminum will cost you $150 more.
yea I believe 91 perform better than 87.
#1005 of 1186 Re: Honda Pilot Real World MPG [kingfans1]
Mar 12, 2010 (12:00 pm)
At Chevron (I know at least in Alabama because I have bought it exclusively for years) there is the same amount of cleaning agent in 87, 89, and 93. All feature "Techron."
I've used 87 in my Honda all of its life with no problems or performance issues at all. I've only got 209k miles on it though, so its not nearly used up.
#1006 of 1186 Re: 2009 Pilot EXL 2WD [jeffinva]
Mar 13, 2010 (4:27 pm)
you mentioned you got 24 hwy. is that 2wd or 4wd? how often you average 24 hwy? I assume 24 mpg only show couple minutes....
please post the prof.. thanks
#1007 of 1186 Re: 2009 Pilot EXL 2WD [kingfans1]
Mar 13, 2010 (8:48 pm)
I'm wondering if there is any site that rates gasolines by the amount of energy they produce. Diesel produces something like 17% more energy per gallon, probably because it is denser. I suspect that there is a difference in brands of gas.
The best car ever was my 98 Honda Accord. It had a sweet spot at 88 mph. More than once I got 27+ mpg at 88 but when I had to slow down to 70, I only got 22 mpg.
One thing I did notice over the years was that if I used synthetic or synthetic blended oil, the mileage didn't improve after changing oil.
My 4 Hondas run smoother on premium gas, but I can't tell any difference in fuel mileage.
#1008 of 1186 Re: Honda Pilot Real World MPG [kingfans1]
Mar 15, 2010 (4:10 am)
>"Octane 91 like chevron, shell, brand name have more cleaning agents than 87. In the long run of using 91, it will maintain your engine max performance. "
Please show proof....Thanks!