Last post on Sep 30, 2013 at 1:53 PM
You are in the Honda Civic
What is this discussion about?
Honda Civic, Fuel Efficiency (MPG)
#2051 of 2125 Re: Honda civic 1998 LX. 120 000 milles [ruking1]
Aug 24, 2009 (8:39 pm)
yeah hope to keep it to 400 000 miles !
i have another calcul for the transfers from metric to imperial.
exemple : 591km for 35 liter
first convert de km to miles so : 591 / 1.6 = 369.375
second, transfert liter into gallon so : 35/ 4.54 = 7.709
after that 369.375 miles / 7.709 = 47.9 mpg
sorry if my english is not to well i speak french normaly. hope you undersatnd me.
so my old 98 civic manual cost me 3k... did 48 mpg on highway !!!!
#2052 of 2125 Re: Honda civic 1998 LX. 120 000 milles [westy1]
Aug 24, 2009 (8:53 pm)
You are absolutely correct in the Imp gal of 48 mpg on the highway. (367.2303 miles/7.6989 imp gal= 47.70 mpg) Canada would prefer this conversion I think.
However for the US gal (128 oz per gal) the mileage is 367.2303 miles/9.246 gals= 39.72 mpg US.
All the best and keep at it !!
#2053 of 2125 2009 Civic MPG
Aug 26, 2009 (5:20 am)
Just bought a 09 Civic EX w/auto. Using as a commute car and not experiencing very good gas mileage. Curious about: 1) break in procedures (if any) and 2) is it normal for gas mileage to be lower than optimum for first 3-5K? Many thanks!
#2054 of 2125 Re: 2009 Civic MPG [pmaenter]
Aug 26, 2009 (5:36 am)
What kind of driving? Heavy traffic, open road, speeds
What mileage are you getting?
#2055 of 2125 Re: 2009 Civic MPG [pmaenter]
Aug 26, 2009 (7:10 am)
Since you are talking in general terms with no specific data or operative goal, I would say concentrate on break in procedures, i.e.,acceleration revs (when fully warm) to least 75% of redline and don't even think about mpg optimization. for at least 5,000 to 10,000 miles or that first break in oil change (10,000 miles OCI) .
#2056 of 2125 Re: Does going with Fully Synthetic oil help with the MPG? [ruking1]
Aug 26, 2009 (7:59 am)
Thank You very much for the detailed Answers ruking1 ! ... Looks like i will be going to Synthetic oil on the first oil change.. . My 2009 Civic LX has 3000 miles on it, and i am getting 31.5 MPG in city driving over the life of the car..... Yeap... i am breaking it in.... ... Even if i push it another 1MPG higher with the Synthetic i would be happy. Hopefully i will change the oil before the Winter kicks into the full gear!
I think we all got accustomed to the gas being at $4/gal, we condider today's prices cheap. ... where in truth, gas is still expensive! even if it drops another 30cents once summer is over.
I am also itching to change the oli every 10K miles, but got to read up on what the folks are saying here... maybe "changing every 15K" would be sufficinet.
Also the dealer reccomends the first oil change at 7500 miles.
And i totally agree Mobil1 Full Synthetic may NOT be the best synthetic out there, but it is the best bang for the buck!
Thanks again for sheading the light! Truly appreciate it!
#2057 of 2125 Re: Does going with Fully Synthetic oil help with the MPG? [chicago1985guy]
Aug 26, 2009 (8:20 am)
Years ago I did a commute to Des Plains, IL. The building I commuted to was so close to the (O'Hare) take off run way that you could literally see THE PLANES almost playing chicken with the building. Il So I have a seat of the pants memory of driving in the Chicago area.
All the best !
#2058 of 2125 Re: Does going with Fully Synthetic oil help with the MPG? [chicago1985guy]
Aug 26, 2009 (6:19 pm)
Unless you are going to put on 7,000 miles before the winter, I'd just run the oem filled even through winter. You might want to check your owners manual to see if the wording has changed or updated, but my owners manual made a BIG deal on running the "break in" factory fill the whole interval. In my case the interval is 10,000 miles.
#2059 of 2125 Cold weather effect?
Dec 22, 2009 (8:29 pm)
I recently made a run from Boston up to northern NH and got way, way below (like 6 mpg) my average since buying the car, an 08 EX 5 speed. Temps during the ~150 mile trip ran from a high of 13 degrees F to a low of -6. This was an all highway trip, and I would have expected to get somewhere near my 18 month average because of that.
Does anyone know if the engine might run in open loop below a certain temperature, or make some adjustments that would cause such a huge drop? This is the first time I've run it for an extended period at those temps, and it really surprised me. I'm back to getting "normal" mileage since then.
#2060 of 2125 Re: Cold weather effect? [pescatore]
Dec 23, 2009 (3:25 am)
Some thoughts come to mind:
Tire air pressure low due to the temperature,
Pushing the car thru more dense (colder) air.
Filling at 2 different pumps.
If you have "climate control" and it was on the AUTO setting, the AC compressor would have most likely been operating.
Driving faster than normal.
Heavier load than normal.