Notices
RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.

Gas mileage bad

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 09-18-2015, 07:09 AM
  #1  
Registered
Thread Starter
 
yapakanichi's Avatar
 
Join Date: Jun 2015
Posts: 108
Received 0 Likes on 0 Posts
Gas mileage bad

Well I'm getting like 12.6 MPG according to my math.

My communte is like 5-10 minutes with about 5 traffic lights in between. I typically get up to 30MPH. I don't know.

It has a K&N drop in filter, AP Midpipe, and RB exhaust.
Old 09-18-2015, 07:15 AM
  #2  
Registered
iTrader: (1)
 
Loki's Avatar
 
Join Date: Jun 2009
Location: Montreal
Posts: 7,712
Received 952 Likes on 830 Posts
Makes sense, the car barely has time to warm up. How is it on longer trips?
Old 09-18-2015, 07:25 AM
  #3  
Registered
Thread Starter
 
yapakanichi's Avatar
 
Join Date: Jun 2015
Posts: 108
Received 0 Likes on 0 Posts
I don't know how longer trips are. I let it warm up everytime I start to almost operating temp.
Old 09-18-2015, 07:46 AM
  #4  
1% evil, 99% hot gas.
iTrader: (21)
 
wankelbolt's Avatar
 
Join Date: Nov 2007
Location: Forest Hill, MD
Posts: 1,107
Received 129 Likes on 94 Posts
Originally Posted by yapakanichi
I let it warm up everytime I start to almost operating temp.
Good for the car, but terrible for the fuel economy. Especially when the trip is short. Your average speed is probably 10-15 MPH which is also bad for MPG. Given your description of your commute, your MPG is just fine. You should consider walking or bicycling with a commute that short.

Last edited by wankelbolt; 09-18-2015 at 08:27 AM.
Old 09-18-2015, 09:43 AM
  #5  
Registered
Thread Starter
 
yapakanichi's Avatar
 
Join Date: Jun 2015
Posts: 108
Received 0 Likes on 0 Posts
Nah, not with my job. I gotta go to the troop, do PT, go home, SSS, Go back to work, Go home for lunch, go back to work, then leave for the day. I don't want to walk that
Old 09-18-2015, 09:47 AM
  #6  
Time for boost...
iTrader: (24)
 
RX8Soldier's Avatar
 
Join Date: Jun 2010
Location: Canada
Posts: 5,414
Likes: 0
Received 15 Likes on 14 Posts
To add to what others have said...
There are hundreds of threads on gas mileage. Theres a topic on it in the new and potential owners sticky. If your mileage is abnormal (from YOUR normal driving habits), then there are ways to troubleshoot and remidy the issue (such as ignition/ exhaust health, etc).

I know you believe your issue to be different, but it's actually a common topic that has been answered in detail (short commutes, etc).

This is for others who may stumble across this thread...
Old 09-18-2015, 09:51 AM
  #7  
1% evil, 99% hot gas.
iTrader: (21)
 
wankelbolt's Avatar
 
Join Date: Nov 2007
Location: Forest Hill, MD
Posts: 1,107
Received 129 Likes on 94 Posts
Originally Posted by yapakanichi
Nah, not with my job. I gotta go to the troop, do PT, go home, SSS, Go back to work, Go home for lunch, go back to work, then leave for the day. I don't want to walk that
Then suck it up, gas is cheap.

Or go get a PHEV or EV. Your short back and forth twice a day commute is perfect for either.
Old 09-18-2015, 12:58 PM
  #8  
Registered
Thread Starter
 
yapakanichi's Avatar
 
Join Date: Jun 2015
Posts: 108
Received 0 Likes on 0 Posts
I was just curious if this is normal. Just confirming my suspicions.
Old 09-18-2015, 03:41 PM
  #9  
Registered
iTrader: (1)
 
Loki's Avatar
 
Join Date: Jun 2009
Location: Montreal
Posts: 7,712
Received 952 Likes on 830 Posts
With all that idling, make sure you take the car out for a beating once in a while. Keep the carbon from building up.
Old 09-19-2015, 07:28 PM
  #10  
Registered
 
fullboost14's Avatar
 
Join Date: Dec 2014
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Echoing what others have said, none of this sounds abnormal. Depending on age of your car/how long you've owned it, you might find some improvements in ignition replacement alone. But definitely also give yourself a few extra minutes to let the car warm up and get a few good revs in.
Old 09-20-2015, 10:54 PM
  #11  
Registered
 
djgiron's Avatar
 
Join Date: Aug 2004
Location: Denver
Posts: 585
Likes: 0
Received 9 Likes on 6 Posts
Gas mileage bad

Need to replace that filter too, several threads about KN drop in filters
Old 09-23-2015, 02:14 PM
  #12  
Registered
 
j9fd3s's Avatar
 
Join Date: May 2003
Posts: 1,382
Likes: 0
Received 10 Likes on 10 Posts
Originally Posted by yapakanichi
Well I'm getting like 12.6 MPG according to my math.

My communte is like 5-10 minutes with about 5 traffic lights in between. I typically get up to 30MPH. I don't know.
sure you do. we use miles per gallon to measure fuel economy. the engine uses fuel when its running, and then we divide by the number of miles. if you let the engine run when you are not moving, the miles are 0, so you get 0 miles per gallon.

in your example, you're only going about 5 miles a day, but letting the engine warm up, its probably running for an hour total.

its why freeway mileage is better, there are many more miles.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Vedivan1
Series I Trouble Shooting
2
09-18-2015 12:39 PM
Redheddude222
Series I Trouble Shooting
3
09-14-2015 02:55 PM
GARCIAC951
Series I Tech Garage
8
09-10-2015 07:17 PM
Tsurugi
New Member Forum
0
09-07-2015 08:27 PM
titaneum_grey
Series I Trouble Shooting
3
09-06-2015 10:21 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Gas mileage bad



All times are GMT -5. The time now is 07:07 PM.