Dresden
Well-known member
I hear good things about the Optima and Sonata Hybrids.. peeps on Redflagdeals were reporting 1000-1200 kms on a tank of gas. recently they were selling off the 2013's for 22-25k OTD if I recall correctly...
Current Gas Prices - No one else concerned??
- Thread starter Dresden
- Start date
I hear good things about the Optima and Sonata Hybrids.. peeps on Redflagdeals were reporting 1000-1200 kms on a tank of gas. recently they were selling off the 2013's for 22-25k OTD if I recall correctly...
Depends on the tank. My bmw had a 60L tank. My Elantra, only 40L
Iceman
Well-known member
40l? How many km can you get on that? I'm looking to pick up a car, the dodge diesel is great on fuel for a truck, but still quite expensive as a commuter. Lol also have a Buick rendezvous, that's the one I'm getting rid of.
Sent from my iPhone using Tapatalk
Nuts...well, they look like inverted nuts
5xx kms according to the computer
That seems piss poor to me I get that out of a 60l tank with a v8 truck.
Sent from my Nexus 4 using Tapatalk
Sent from my Nexus 4 using Tapatalk
Red_Liner740
Well-known member
So you burn 20L more, 50% more fuel and you're not satisfied?
If he gets 500 liters its 8L/100km, if he gets 599 thats 6.6L/100km
Still far cry from the 1600km for $120 dollars he claimed earlier = 5.3L
I get close to 900km to a 75L tank. Diesel SUV
If he gets 500 liters its 8L/100km, if he gets 599 thats 6.6L/100km
Still far cry from the 1600km for $120 dollars he claimed earlier = 5.3L
I get close to 900km to a 75L tank. Diesel SUV
I am satisfied with it for my truck but I would expect more out of a econobox.
A car like that should be able to double the mileage of a v8 truck.
Sent from my Nexus 4 using Tapatalk
A car like that should be able to double the mileage of a v8 truck.
Sent from my Nexus 4 using Tapatalk
Red_Liner740
Well-known member
Scale of diminishing returns....there's a certain point where it gets harder and harder to get better MPG.
So far 6 to 7L has been the defacto "econobox" mileage for a long time. Anything lower on a consistent basis and you go diesel or hybrid.
So far 6 to 7L has been the defacto "econobox" mileage for a long time. Anything lower on a consistent basis and you go diesel or hybrid.
rmemedic
Well-known member
Guys are reporting 30MPG so under 8L/100km in LS1 swapped 80s camaro/firebirds. Considering that era trans am is one of the most aerodynamic GM cars it makes sense... Can't wait to get my swap finished to use the car as my weekend vehicle and leave the truck at home. Even with a worn out 305 with leaky valve seals and some other motor issues it gets better mileage than the truck.
Sorry guys, I haven't done the calculations in details. Just roughly on the top of my head. I plan to do the calculations soon. I'll pump till full then monitor the amount of kms driven. Then next fillup, i'll see at the pump how much liters I put in.
My computer says 7.5l/100km mix driving.
Gotta factor in winter gas give bad mileage plus spending a minute or 2 warm up
Last edited:
Air resistance doesn't change. If you have a square shaped vehicle, a slightly smaller square shaped vehicle is still going to have to push against the medium of air.
If you have a little tiny engine you then need lots of rpm to generate enough torque in order to move the object against the resistance of air. It may very well be that sometimes a bigger engine is better for a specific speed.
Remember, air is thick enough that a 777 loaded with fuel can run down a runway with wheels, lift off, and then disappear.
If you have a little tiny engine you then need lots of rpm to generate enough torque in order to move the object against the resistance of air. It may very well be that sometimes a bigger engine is better for a specific speed.
Remember, air is thick enough that a 777 loaded with fuel can run down a runway with wheels, lift off, and then disappear.
Red_Liner740
Well-known member
Wow...just wow
first of all, air resistance DOES change, hence the Cd (Coefficient of Drag) ratings that cars are given. It makes a huge difference at higher speeds. In fact air resistance is an exponential increase after 80km/h.
Internal combustion engines are most fuel efficient at their peak torque rating and 80% throttle. It IS the primary reason that smaller engines are more fuel efficient.
A larger engine which is using only a small fraction of throttle to maintain cruising rpm is breathing through a straw which leads to high pumping losses. A smaller engine throttle body can open up to allow free breathing.
A "tiny engine" doesnt need high RPM to generate enough torque. In fact if you look at all of modern cars that are geared towards fuel efficiency, they are all geared very long so that you have as low as RPM crusing as possible. This leads to less pumping losses, less friction losses from fuel used just to maintain engine rpm and also allows for a wide open throttle plate.
Hell the company Matrix is geared so long that any incline on the highway and the thing has to downshift. but that also means its at its peak fuel efficiency while cruising
Lastly the actual air density also changes with altitude. You think commercial jets fly at 40K feet cuz the view is nice? No, its because the air density is much lower, therefore the same amount of thrust will allow you to fly much faster.
first of all, air resistance DOES change, hence the Cd (Coefficient of Drag) ratings that cars are given. It makes a huge difference at higher speeds. In fact air resistance is an exponential increase after 80km/h.
Internal combustion engines are most fuel efficient at their peak torque rating and 80% throttle. It IS the primary reason that smaller engines are more fuel efficient.
A larger engine which is using only a small fraction of throttle to maintain cruising rpm is breathing through a straw which leads to high pumping losses. A smaller engine throttle body can open up to allow free breathing.
A "tiny engine" doesnt need high RPM to generate enough torque. In fact if you look at all of modern cars that are geared towards fuel efficiency, they are all geared very long so that you have as low as RPM crusing as possible. This leads to less pumping losses, less friction losses from fuel used just to maintain engine rpm and also allows for a wide open throttle plate.
Hell the company Matrix is geared so long that any incline on the highway and the thing has to downshift. but that also means its at its peak fuel efficiency while cruising
Lastly the actual air density also changes with altitude. You think commercial jets fly at 40K feet cuz the view is nice? No, its because the air density is much lower, therefore the same amount of thrust will allow you to fly much faster.
Red Liner: Not disagreeing with you, I just wanted to clarify one thing. When I said air resistance doesn't change, what I specifically was thinking of was if one had two square blocks each travelling at the exact same speed, the resistance against both blocks would be the same. The difference would be the engine propulsion involved and how much energy it requires to make that block achieve and then maintain that specific speed.
GP_RZ
Well-known member
I agree with you. My 2008 Sierra RC/SB with 4.8 can get 700+km per 90L tank of regular gas.
Hybrid on the hwy? Get a diesel.
the_need_for_speed
Well-known member
I just bought a Ford Raptor.....
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
I have friends on FB who post silly pictures or links to petitions to have our government "fix" the high gas prices. I think it's naive to think that the gov't would ever do anything to help us in situations like this.
There is a silver lining to high gas prices, it creates the demand for innovation. Battery and electric vehicle technology has advanced a lot in the last ten years and every passing day makes that technology more affordable. Clean burning and efficient alternative fuels for home heating has advanced a lot too, if natural gas prices keep going up there will be more demand and innovation with wood pellet, corn or bio mass furnaces.
No government is going to come and save you. When the going gets tough we'll need to cowboy up. Change how we live, drive different vehicles, get rid of natural gas heat, etc. It's up to us. If all you do is complain nothing will ever change.
There is a silver lining to high gas prices, it creates the demand for innovation. Battery and electric vehicle technology has advanced a lot in the last ten years and every passing day makes that technology more affordable. Clean burning and efficient alternative fuels for home heating has advanced a lot too, if natural gas prices keep going up there will be more demand and innovation with wood pellet, corn or bio mass furnaces.
No government is going to come and save you. When the going gets tough we'll need to cowboy up. Change how we live, drive different vehicles, get rid of natural gas heat, etc. It's up to us. If all you do is complain nothing will ever change.
Oh and dont you worry, whatever solution people find the government will figure out a way to tax that as well.
Where's the retweet button?
