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Is200 Sport Mpg


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#1 Spoony

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Posted 13 February 2008 - 06:55 PM

I've done an experiment over the last few days with MPG. I know its a well covered subject, but I just thought I'd share my findings with you all.

I've started driving at a strict 65-70 MPH to see how much difference it actually makes to fuel economy on my '03 IS200 Sport.

I filled my tank and then did a 186 mile round tip on Monday and filled up after the journey. I averaged 32.13 MPG!

The today I did a 261 mile round trip, filling up before and after again - this time I've managed 34.38 MPG!

This is up nearly 10 MPG from my average cruising speed of ~80 MPH and I still arrived at both destinations a few minutes quicker than TomTom originally estimated.

So I'll reiterate - driving 10-15 MPH slower on the motorway makes a massive difference to economy and bugger all difference to travel times. If you get paid by the mile (as i do) then this has a direct impact on your monthly expenses!

This can only mean more money for mods. Woohoo! :winky:

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#2 WylieCoyote

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Posted 13 February 2008 - 07:13 PM

Interesting point. It's a well-accepted fact that driving slower will increase fuel efficiency. A cars' peak economy is around 55mph. I've got a 300-mile trip coming up to Northumberland and I plan to drive at a steady 55mph to see what the best possible economy is I'll ever get from my car.
Spoony's results are compelling reason enough to take it a bit easier on the gas.

:)

#3 Lexus2D

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Posted 13 February 2008 - 10:25 PM

Easier said than done :yahoo: if your owt like me :blush:

u know it makes sence but when u av a tit up ur but u just carnt help yourself :whistling:

#4 dazz32

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Posted 13 February 2008 - 11:18 PM

its even worse when you have 2 tits near ya backside. :P :lol: cant help myself ...... :hehe:

i can drive slow when i need to but if i have the room and dont act like a ****** i like to put my foot down.

#5 WylieCoyote

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Posted 14 February 2008 - 12:11 AM

Don't get me wrong, I use the power of the engine to drive quickly but within the limits of grip, visibility and of course the speed limit (I know, boring old git, sunday driver and so on, I've heard them all). I've never noticed any difference in MPG between driving like an undertaker or using the engine's power.

#6 DJ Wozza

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Posted 14 February 2008 - 02:01 AM

I have a heavy right foot, but it's not my foot's fault........




it's because it is connected to the rest of me :lol:

#7 Lexus2D

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Posted 14 February 2008 - 09:21 AM

its even worse when you have 2 tits near ya backside. :P :lol: cant help myself ...... :hehe:

i can drive slow when i need to but if i have the room and dont act like a ****** i like to put my foot down.


Trust u :blush:

#8 Jack300

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Posted 14 February 2008 - 01:20 PM

There is a school of thought that says for max economy, you drive like this... Foot to the floor in every gear, change up at 2000rpm. When you achieve your desired speed, foot off the accelerator, when you slow too much then foot back on the accelerator to the floor. It's supposed to save about 16% of fuel.

Theory is, throttle fully open most of the time means least resistance for air, plus engine management system is most economical at full throttle. Also the mgt system can control fuel economy better than a driver can.

Sounds complete bol***ks to me but it's evidently true. I've never tried it but a colleague has and he conforms that it works. The driving technique takes some getting used to - so I'm told.

Good luck

Jack

#9 VVProtocolVV

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Posted 14 February 2008 - 11:20 PM

I use my is200 to get to work and back at no more and no less than 33.4 miles a day and i know the road through the country and A roads so well i learnt to cut down on gear change and braking (which contributes to higher fuel econ), and i never go over 3000rpm or around 55-60 at any point in the journey (when i goto work why hurry? i just make sure i have plenty of time and when going home i like to just enjoy driving with music to wind down after a days work at the office). If you're like me, i also warm the car up before i start driving. This is where you ask, so why get a 2 litre car if you're going to be like that? Well because like some of you here i like a bit of oomph when i need to, sorry but a 1.1 litre just doesn't cut it for me, especially when you're going from stand still at round abouts when its busy and you need to get through a gap in the traffic. Oh and looks of the car ofcourse!

#10 WylieCoyote

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Posted 15 February 2008 - 09:36 AM

There is a school of thought that says for max economy, you drive like this... Foot to the floor in every gear, change up at 2000rpm. When you achieve your desired speed, foot off the accelerator, when you slow too much then foot back on the accelerator to the floor. It's supposed to save about 16% of fuel.

Theory is, throttle fully open most of the time means least resistance for air, plus engine management system is most economical at full throttle. Also the mgt system can control fuel economy better than a driver can.

Sounds complete bol***ks to me but it's evidently true. I've never tried it but a colleague has and he conforms that it works. The driving technique takes some getting used to - so I'm told.

Good luck

Jack

I've never heard that one before. Surely full throttle would haemorrhage fuel into the engine? Also 2000rpm would mean you're changing gear within a second of the last. Still, if it's been proven I'm not going to disagree. It would also make a pretty uncomfortable ride for passengers surely???

#11 Jolliffee

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Posted 15 February 2008 - 10:31 AM

There is a school of thought that says for max economy, you drive like this... Foot to the floor in every gear, change up at 2000rpm. When you achieve your desired speed, foot off the accelerator, when you slow too much then foot back on the accelerator to the floor. It's supposed to save about 16% of fuel.

Theory is, throttle fully open most of the time means least resistance for air, plus engine management system is most economical at full throttle. Also the mgt system can control fuel economy better than a driver can.

Sounds complete bol***ks to me but it's evidently true. I've never tried it but a colleague has and he conforms that it works. The driving technique takes some getting used to - so I'm told.

Good luck

Jack

I've never heard that one before. Surely full throttle would haemorrhage fuel into the engine? Also 2000rpm would mean you're changing gear within a second of the last. Still, if it's been proven I'm not going to disagree. It would also make a pretty uncomfortable ride for passengers surely???


This comes from the days of carburettors.

I used to tell the boss this all the time that is was better to have twin Weber chokes working to improve the fuel consumption. I think it’s a load of bollocks but it is a load of fun! :winky:

Oh! She did catch on when she repeated it one night and the guys laffed! :blush:

#12 Jack300

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Posted 15 February 2008 - 01:22 PM

...came from an article in auto express - some university consultant to lotus and others. all above-board. i think it's more suitable for up to 2ltr cars - because of the comfort factor as you point out. at the time I was driving 230bhp normally aspirated so foot to the floor driving could be considered dangerous... I never tried it. Don't think I will with the sports cross - but then again...

#13 cmcnk06

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Posted 20 February 2010 - 10:07 PM

:tomato: :shutit: the girl drives it day to day and burstin my arse.......mpg? 10 as she puts 33 miles.....thats a bit harsh. done the plugs. air filter. etc/this is around the city, normal?

#14 Asi

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Posted 20 February 2010 - 10:09 PM

i use to get 300 miles from a full tank which was 70 pounds

#15 ormi

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Posted 20 February 2010 - 10:14 PM

to a full tank of vpower(80) i just got 210 miles!!first tank since i supercharged it so i have been giving it a boot full(just love the noise)

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