| Hilbe |
| I have posted a few threads on the Performance section about my Injen CAI and that I thought it increased my MPG. I decided to test it out on my trip on Saturday from East Columbus to East Indianapolis (~180 miles from point to point). I cleared my MPG calculation at the gas station in Columbus. It was about 68 to 75 degrees for the entire trip and I averaged about 70mph, with several times reaching 80mph for extended periods of time. I was not running the AC and the windows were up with the fan on. I have attached the picture of my MPG. |
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| SUNSPOT |
| That is just about what I get on the highway between Grand Coulee Dam and Spokane Washington. It is a 2 lane hwy all the way and top speed is about 65 (with slowing to 30-35 mph) for the speed-trap towns). |
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| Kris |
| Drove 300 miles from Virginia to Georgia recently. 90 - 95 F outside. A/C on all the time. Speed - most of the time 65 - 75 mph. The area is quite hilly, unlike Indiana. got 26 mpg. No modifications, Murano has 82k miles. So the results are similar to yours... |
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| Hilbe |
quote:
Originally posted by Kris
Drove 300 miles from Virginia to Georgia recently. 90 - 95 F outside. A/C on all the time. Speed - most of the time 65 - 75 mph. The area is quite hilly, unlike Indiana. got 26 mpg. No modifications, Murano has 82k miles. So the results are similar to yours...
Hmmm. I never broke 26 without the CAI. Maybe I just drive fast... |
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| njjoe |
Thanx to the CVT, the VQ lopes along at a leisurely 2,000 RPMs at highway speeds. The Injen CAI has virtually no effect at such relatively low RPMs.
-njjoe |
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| lilazndemon20 |
| im only getting 20mpg. long trips, short trips, doesnt really matter. do you guys think there's something wrong w/ my murano? |
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| Hilbe |
quote:
Originally posted by lilazndemon20
im only getting 20mpg. long trips, short trips, doesnt really matter. do you guys think there's something wrong w/ my murano?
You running premium? You running ethanol?
I run 93 octane non-ethanol only... |
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| lilazndemon20 |
quote:
Originally posted by Hilbe
You running premium? You running ethanol?
I run 93 octane non-ethanol only...
no just 87. i didnt notice a huge difference between 91 and 87. the long trip was mostly 75, temp ranges from 110 to 60 degrees F. |
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| njjoe |
quote:
Originally posted by lilazndemon20
im only getting 20mpg. long trips, short trips, doesnt really matter. do you guys think there's something wrong w/ my murano?
How many miles on your MO? My fuel efficiency started to show real improvement as I neared the 10,000 mile mark.
What is your average speed on the highway? My MO is best around 50 mph. Beyond that, the efficiency suffers. I can get 30 mpg on flat ground at 50 mph. At 65 mph I can still manage mid-20s.
I run regular gas and Mobile1.
-njjoe |
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| lilazndemon20 |
quote:
Originally posted by njjoe
How many miles on your MO? My fuel efficiency started to real show improvement as I neared the 10,000 mile mark.
What is your average speed on the highway? My MO is best around 50 mph. Beyond that, the efficiency suffers. I can get 30 mpg on flat ground at 50 mph. At 65 mph I can still manage mid-20s.
I run regular gas and Mobile1.
-njjoe
i have 34k miles on my mo, ave speed on that long trip was 75, i use 87 octane, and 5w-30 mobile 1 synthetic. only get 20 mpg. however, i did take my murano in for a constant pinging problem and they might have retarded the ignition timing and reprogrammed the ecu but i dont know how far they retarded the timing. |
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| njjoe |
lilazndemon20-
Seventy-five is well above the MO's fuel efficiency "sweet spot". You are pushing a lot of air at that speed.
-njjoe |
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| lilazndemon20 |
| what are you guys seeing mpg wise when not taking long trips? i dont think i ever seen anything over 20 |
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| SIM |
Again, there is no way that increasing air flow will decrease gas consumption. When air flow is increased, the ECU *should* adjust the gas/air mixture to keep it optimal.
When I say *should* it is simply because many variables are to be taken into consideration like for example restriction at the exhaust level. If it can't burn any more fuel, the ECU will simply reduce the volume of air being admittted to keep the mixture optimal.
In the case that everything is optimal, more air will always mean that more gas is burned as well because the mixture ratio CANNOT be altered. Simple as that, no magic and no advertising mumbo jumbo.
So, what is happening in this test is simply that CAI or not, there is no more air being sucked in at the engine speed performed in this test. If there was, the gas consumption would definitely increase. |
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| lilazndemon20 |
| i think njjoe means more air resistence not airflow into the engine |
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| njjoe |
quote:
Originally posted by lilazndemon20
i think njjoe means more air resistance not airflow into the engine
Precisely.:4:
-njjoe |
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| SIM |
| I was referring to the original subject of this discussion. Sorry for the confusion. |
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| crashdump |
my best mpg was 20.4 and now it doesn't break 19.3. thats a combo of highway and city. doing around 60-70mph. I run 93 octane not sure about the mix of it.
car has around 9300 miles. |
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| MurAndo |
| wowww you guys are doing much better than me, my car on average with twenty two inch rims and exhaust im pretty much gettin 15.2 miles per gallon, sometimes i punch the pedal what can i do im a very angry driver lol |
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