Last post on Dec 31, 2012 at 8:05 PM
You are in the Kia Optima
What is this discussion about?
Kia Optima, Fuel Efficiency (MPG), Sedan
#204 of 211 Re: Gas engine sedan mpg discussion [cski]
Dec 28, 2012 (11:59 am)
#203, yeah there is no way 40 is going to happen in this car. Not even 30mpg unless you're driving a lot of freeway (Im talking about the 2012 SLS awd). But I am super happy with the car. I just filled up yesterday and avg was 26mpg with a lot of driving in heavy snow here in Utah. about 75% freeway
#205 of 211 New Mazda6 owner...it's millertime!
Dec 28, 2012 (1:29 pm)
Please tell us all about your new Mazda6. We all would love to hear about it. Models, price, specs, etc.
This is a real contender and you are the first to own the new model! Awesome.
Hope u r happy w/ it!
#206 of 211 Re: Gas engine sedan mpg discussion [cski]
Dec 28, 2012 (3:35 pm)
Well, GDI doesn't have much to do with it. My Sentra isn't GDI for example. Also today I was able to get 43 mpg on a non-GDI 2012 Altima 2.5S (previous generation) under ideal conditions: mild temps (but no a/c needed), relatively flat terrain, no strong headwind (had a crosswind though), and 55-65 mph speed limits with only a couple of stops. THEN I entered a freeway with a 75 mph limit, and I was at 75-76 most of the time. The mpg plummeted quickly and when I exited that freeway 130 miles later, the FE readout was at 32.2 mpg... which means the mpg on that freeway jaunt was less than 32.2 mpg since it started at about 43 mpg. Then after about 20 miles at 60-65 mph, the average FE crept back up to 33.4. What a huge difference speed makes for fuel economy! Something for folks to consider when they don't see their Optimas or other cars hitting the EPA fuel economy numbers on the highway, but tend to drive at 70+ mph.
#207 of 211 Re: Gas engine sedan mpg discussion [backy]
Dec 30, 2012 (5:45 pm)
You have to understand that it is not the speed causing the plummeting MPG. It is air resistance. Wind at 75 MPH is a class one hurricane. That pressure on the front of the car is far more than at 55. So it isn't the engine becoming suddenly non-economical. Make sense?
#208 of 211 My SX is broken in...
Dec 30, 2012 (11:32 pm)
Hey guys, I've got about 7,000 miles on my 2012 Turbo SX and I recently averaged about 24.5 mpg (Eco on) on a tank that I got stuck in traffic with. I had to drop my son off at the local K-Mart to meet other Cub Scouts who were going on a weekend trip. The usual 8 minute drive took 2 and a half hours due to an overturned truck on the Fwy. So I was happy with the 24.5 mpg. Later on, my tire pressure light came on and I discovered that all 4 tires were evenly low on air. Off the top of my head, I think the max pressure on my tires were 48-49 psi max. I filled them up to about 38-39 psi and averaged 29 mpg on my next tank. I drive about 65% Hwy and 35% City. I live at the top of a hill and my Fwy routes have ups and downs. Oh, and YES, I do occasionally open up that Turbo
#209 of 211 Re: My SX is broken in... [lakerfan24]
Dec 31, 2012 (6:11 pm)
Great. I get 24.2-24.8 consistently. I have the 2.4, but both engines have similar figures.
I am guessing that there was a sudden cold snap where you live and that dropped the tire pressure.
It's normal in my hypothetical condition.
Happy New Year
#210 of 211 Re: My SX is broken in... [cski]
Dec 31, 2012 (6:37 pm)
It's cold here now, but it wasn't really when it happened. I think cuz I don't drive it all the time and it sometimes sit for a week or so without driving it can cause the pressure to lower.
I got it Nov 2011 and it's under 7,000 miles now. I think it has to do with the way you drive too. If I'm NOT driving stop light to stop light, I like to work thru to gears quickly and when I hit about 42-43 mph, I put it into 6th gear and ease off the gas. If going onto the Hwy, I would do the same but would get up to my cruising speed or the flow of traffic and then back off the gas...
#211 of 211 Re: Gas engine sedan mpg discussion [cski]
Dec 31, 2012 (8:05 pm)
You have to understand that it is not the speed causing the plummeting MPG. It is air resistance.
And the increased air resistance is due to... what, exactly?
I tried to find a route that existed in a total vacuum, but then realized the engine needs air to operate, so I scratched that idea.