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'09 Civic, Auto: What RPM's (speed) for the Best Mileage?
Last May, I purchased my first, '09 Civic EX, Auto. I was wondering at what RPM range you get the best mileage? This is the main reason for purchasing the Civic, in the first place.
My '03 Cummins diesel is most efficient at the 1800-1900 rpm range. Cummins builds these engines to operate that way in that rpm range. I was wondering if Honda does a similar thing?
The car has about 1300 miles on it, now. I've been breaking it in, sensibly, because I would like to keep this car for quite awhile. So far, I've gotten around 26 mpg's with ALL in-town driving & a high of 36 mpg's with ALL highway (Interstate, flat, no hills) driving (62-65 mph.) My last fill-up was just a bit over 30 mpg's. That was with the vast majority of in-town, surface street driving & about 20 miles of freeway (in-town) driving. I drive conservatively. Is this mileage what is to be expected for this new a car? Will it improve, with time? Just curious.
Any thoughts & suggestions would be appreciated.
Thanks.
Joe F.
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Re: '09 Civic, Auto: What RPM's (speed) for the Best Mileage?
for me try not to be the first off the line i keep it under 2500 rpm and at 60 its at 2000 so far so good i get about 365 miles off one tank(when their is one gas marker left)
Re: '09 Civic, Auto: What RPM's (speed) for the Best Mileage?
your numbers seem normal. best mileage with most auto cars is around 35mph once the torque converter locks out. obviously with auto, there is little chance of adjusting rpms or shifting. car wont be fully broken in til around 20k miles.
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Re: '09 Civic, Auto: What RPM's (speed) for the Best Mileage?
I bought mine in '07 and pondered about the mileage in the beginning just like you. The best mileage of its class was also the reason I picked the Civic (besides better looks). My initial mileage was about the avg you're getting now, but about 10K miles later it was about 40mpg on the road. On my next trip from Nebraska to California I stopped at the pump only 3 times. I was in disbelief and wanted to double check on the way back... and it was true. Being a smooth driver also improves your mileage by about 30%. I'm sure this is the best car I ever had; buying price is a little higher than other simillars, but cost to own is worth it. Besides it drives awesome, never breaks down and I feel completely safe when I travel. The easy to see digital speedometer has also saved me from tickets even though mine is a red car. All my friends who needed to used my car say they love it without me asking. Actually 2 also bought a Civic and the other an Accord. I make no comments ahead of time, just let them drive and fall in love. PS: I shared a 1997 Civic with my college roomate for 6 years, we put a lot of miles going to work and taking long road trips and it never broke down on us. I came back to Honda after almost going broke by fixing my Corolla.
Re: '09 Civic, Auto: What RPM's (speed) for the Best Mileage?
Yep, ^^ The smoother you drive, the better fuel economy you will get. Thats for sure. also if you shift it into neutral at stop, that doesnt save any gas because while the load is taken off, the RPM's increase slightly (someone verify).
Re: '09 Civic, Auto: What RPM's (speed) for the Best Mileage?
Well, last Sunday, I decided to take a drive to Flagstaff, AZ. in my new Civic EX. Phoenix, AZ. is at the 1100+' elevation & Flagstaff is at the 7200' elevation. So, you're looking at about a 6000+' climb, all freeway except a bit of in town driving in Flag. I've got around 1800+ miles on the car.
I decided to fill-up before the trip to see what kind of mileage I would get on the trip. All driving before the fill-up was in town, stop & go driving & showed a bit over 23 mpg. I filled up at a Quick Trip station (which, sells a good, tier three fuel, 87 octane). I tried to maintain about 62 to 65 mph. on the trip with the idea of getting good fuel mileage.
When I got to Flag, I drove around town, a bit & then fueled-up at a Fry's grocery store (sells Flying J fuel). Got around 36.5 mpg. Not bad for a 6000' climb and around 136 miles of driving.
Now this is the interesting part, on the way back, mountain driving, freeway (I-17) but, dropping 6000', I filled up at the Quick Trip back in Phoenix & got 51.2 mpg. I hand-calculated all the fill-ups & did this one twice, just to be sure. I would have been happy to have been in the low 40's but, am thrilled with 51.2 mpg.
