This post has been edited by dares: Nov 30 2011, 10:24 PM
Tyre pressure and other ways to save fuel
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 Nov 30 2011, 10:23 PM
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Junior Member
834 posts Joined: Jul 2011 
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Mythbuster also say to roll down your window and switch off your A/C when travelling slower than 45mph (around 73 km/h), which is not advisable when in a traffic jam during daytime, where your blood might boil and then you will explode.
This post has been edited by dares: Nov 30 2011, 10:24 PM |
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Nov 30 2011, 10:42 PM
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Senior Member
544 posts Joined: Jan 2009 
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Rolling down the windows in Malaysia is not very effective... you just get hot air blown all over you.
 Ok, not necessarily, but I think aircon makes sense in Malaysia, but it doesn't have to freeze you. Normally it is also advisable to turn of the engine when stopping (for more than 20 seconds), however you'll lose the aircon... Btw.: http://en.wikipedia.org/wiki/Fuel_economy-...izing_behaviors Some of the tipps are very dangerous (coasting!) or very annoying to others and dangerous (accelerating hard, then turn off the engine and remain in neutral until you get too slow and have to speed up again), but some things everyone can do.  |
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Nov 30 2011, 10:48 PM
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Junior Member
250 posts Joined: Jan 2011
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here, car is expensive, fuel is cheap.
so make sure you enjoy your ride. forget about those hypermilling skill. it only matters in UK or european country . wanna save fuel? get an insight, though the carbon footprint is another issue. over inflate the tire is a suggestion, but here rains everyday. so you risk your life for those carbon black fluid. This post has been edited by turbocharged: Nov 30 2011, 10:49 PM |
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Nov 30 2011, 11:04 PM
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Senior Member
784 posts Joined: Jan 2003 From: Rice Bowl of Msia
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IMHO nvr b over-obsessed with saving fuel but concentrate on driving safely & enjoying yr ride!
 Use car maker's recs on tyre pressures. Rber pressure increases when tyres are heated up. Other tips are juz wat they are...tips! Not compulsory. Apply watever makes yu happy & yr ride comfort is NOT compromised!  ps. Like some hv advised: Wanna save fuel, this & that? Get a bicycle... This post has been edited by zeone: Nov 30 2011, 11:08 PM |
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Nov 30 2011, 11:27 PM
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Senior Member
544 posts Joined: Jan 2009
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True... I'll see how the car handles when it's really wet, but I'm hardly above the suggested pressure, so I should be fine. I hope. So far the handling has improved (and in light rain it was fine today), the comfort hasn't really gone south much (it's relatively harsh anyway, whereas the CBU Kangoo is supposed to be overly soft. Weird. At least the car won't easily crash.)
The fuel isn't that cheap considering what people usually earn (though fuel takes a larger part of the earnings in Europe), though cars are a greater part of the equation (not being cheaper than in other countries, usually more expensive, whereas the fuel is 1/4 the price of fuel in Europe). Besides it doesn't hurt to try to save some fuel, also means less polution and less waste of resources. Don't know about you, but I like the air I breathe to be clean (Shanghai was pretty awful). You just shouldn't risk your life to lower the FC, I totally agree. (I think Tracy inspired this thread in her obsession to save fuel Or maybe she just wants a reason to buy a new car. ) |
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Nov 30 2011, 11:39 PM
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Senior Member
760 posts Joined: Aug 2006 From: coming back through stratosphere
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type overpressure, aircon, glide with neutral gear, etc all sounded like make sense......but only on theory.
in real life they have no significant effect. overpressure - safe 1 % of of FC but 4 tyres wear faster, maybe reduce 10-15% of tyre life. off aircon - if u can tahan the heat, be my guess.... glide with neutral gear - u risking your life with no throttle (accelerate) to respond if u meet an accident, eg. need to speed up to avoid an incoming crash. not to mention clutch & gb wear faster with more frequent shifting. a cheapo gb cost u 5k, a cvt ot dsg could easily burn ur wallet with a price tag of 20k or more. wanna be smart to save a few cent (ok maybe a ringgit or two) of each tank with the cost of tyre wear, gb wear, free sauna, trying to kill yourself by giving up the throttle? think again... if u r driving a 2.0L or smaller, dont worry about FC. if u r driving greater than 2.0L but wanna save some fuel? obviously u made a wrong choice, u bought the wrong car. |
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Nov 30 2011, 11:46 PM
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Senior Member
5,464 posts Joined: Mar 2005
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wow. so many expert around here. Feeling a bit shy, but I will just say one significant way of saving fuel is driving technique. You need to know your cars optimum's rev/load etc. maintaining that level, you will ensure an efficient drive. Maintenance also play an important role too.
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Dec 1 2011, 12:00 AM
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Junior Member
178 posts Joined: Oct 2004
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Best FC saving is to drive about 70k-80m/hr in top gear, without air con. Haha....Whether u can endure the pain or not is another story...
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Dec 1 2011, 12:12 AM
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Senior Member
1,533 posts Joined: Aug 2007
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QUOTE(ahsam1212 @ Dec 1 2011, 12:00 AM) Best FC saving is to drive about 70k-80m/hr in top gear, without air con. Haha....Whether u can endure the pain or not is another story... 70-80km/h with pain? I travel around 20km daily with that speed with air cond off.. i dont feel pain at all.. if you are talking about 90-100 and above.. then its diff story.. i will close my windows when i reach that speed and on my air cond.. huhu |
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Dec 1 2011, 12:20 AM
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Senior Member
544 posts Joined: Jan 2009
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Haha, turning off the aircon is a bit extreme.
It's no big deal to quickly engage a gear when in neutral (especially with a manual... I make sure to be in the right gear to pick up speed again, so I just need to let go of the clutch/rev match. I'm only doing that when I approach a traffic light/stop sign or I'm in a traffic jam though). Not sure about tyre wear. Too low pressure will definitely wear down the tyre very fast, if you want to play it safe and comfortable then by all means use the recommended pressure. That's basically what I am doing (+0.1 bar in front, still way below the limit). In Europe many (including car clubs) recommend +0.2 bar, however the climate is different, so I don't know if one can apply that here (they are also more keen on saving petrol... almost RM 7 per liter now!). I used to drive with +0.1-0.2 bar over the minimum recommended pressure and didn't notice any increase in tyre wear, but I did not really pay attention to it and the recommended pressure is pretty low for that car. Hypermiling... please don't. That might be a nice hobby/sport (if you are James May), but on public roads? Btw., somewhere here I've read that some remove their catalytic converter to save a few %... -.- Ps: My 1.4 uses about 12l/100km... I know I'm accelerating too hard, but that's just too much. How can such a small engine burn so much fuel? Since I've pumped up the tyres the car seems to change gear earlier and the speed is maintained more easily, at least that's my impression so far. |
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Dec 1 2011, 12:35 AM
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Staff
25,802 posts Joined: Jan 2003 From: Penang
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One thing many missed out from the discussion, over-inflated tyres can be dangerous as well.
Over-inflated tyre provide you less traction and can cause safety issue as well. Not to mention causing damage to the suspension as well as early damage to the tyre itself, which cause you more money to repair/change afterwards. Don't be penny wise and pound foolish, aka try to save a few penny then loose a few pound. There is reason, why optimum tyre pressure is recommended. If over-infated pressure is good, then you see car manufacturers should be recommend must pump tyre over xx psi already, not xx~yy psi. |
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Dec 1 2011, 01:20 AM
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Senior Member
8,930 posts Joined: Nov 2005 From: Subang Jaya
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QUOTE(dares @ Nov 30 2011, 10:23 PM) Mythbuster also say to roll down your window and switch off your A/C when travelling slower than 45mph (around 73 km/h), which is not advisable when in a traffic jam during daytime, where your blood might boil and then you will explode. Don't forget, they're comparing it with full blast. Now who in their right mind would turn up the A/C to full blast throughout the journey?  |
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Dec 1 2011, 02:13 AM
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Senior Member
544 posts Joined: Jan 2009
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QUOTE(Nightstalker1993 @ Dec 1 2011, 01:20 AM) Don't forget, they're comparing it with full blast. Uuuuuuuuuhm... me. Now who in their right mind would turn up the A/C to full blast throughout the journey? (at least sometimes). 7 seater with only blowers in the front row, so if the 3rd row is supposed to not be in a sauna it has to be arctic winter in the front.  Previous owner should have gotten the extra blowers for the rear passengers...Btw., it's not safe for the driver to be too warm. The brain doesn't work that well when it's hot. This post has been edited by kadajawi: Dec 7 2011, 11:44 PM |
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Dec 7 2011, 11:50 PM
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Senior Member
544 posts Joined: Jan 2009
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Ok, so first attempt, 12 liter/100 km. Previously around 12.5, but more luggage (7 persons, 4 of them kids instead of usually 2 adults only) on board.
Then now I just filled up, 11.5 liter. Not as good as I hoped for, this time more highway (150 km in Singapore, usually the fastest driver on the road (around speed limit), most of the time 6 adults in the car, again 12.5 is with usually 2), then 150 km in Malaysia with some traffic jams etc. Definitely an improvement, but perhaps not as big as I hoped for. But hey, every bit helps. Handling has improved, even though I have found a sticker that recommends a lower pressure than what the Continental website suggested for the car. I have noticed that the front tyres were worn out unevenly, probably due to low pressure (the thread pointing away from the car is F1 style now...). Might have to look for new ones soon... sad.gif Maybe eco tyres? But I don't want to compromise on safety... |
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Feb 2 2012, 02:02 AM
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Senior Member
1,156 posts Joined: Dec 2007
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QUOTE(kadajawi @ Nov 30 2011, 07:28 PM) I have used the search function, but I didn't see a topic on this... so here we go. poor fag wanna save fuel with tyre pressure????Today I spoke to a relative who thinks people generally don't care about tyre pressure. So I'm curious. Do you? What's your tyre pressure, and why? Do you follow the advise given by the manufacturer, do you check regularly, ...? I'm currently testing 2.7 bar in front and 2.9 at the back, might increase the front to 2.8 or 2.9 too. Anything speaking against that? So far (previously it was about 2) my experience is good, FC seems to be lower (will check the next time I fill up), acceleration is better, gear changes happen earlier, steering is lighter, car feels more stable (even if it is slightly less comfortable). That being said, maybe we can collect more or less common tips on saving fuel here? What I have heard: Accelerating fast, but then coasting along gently (try to avoid constant speed changes) should help, I have heard (short bursts of high RPM are ok, staying at a high RPM is not). In other countries I have seen drivers who'd be in 3rd at 50-70 km/h... that's not good. 5th is usually fine with any car, unless you go uphill or need to accelerate fast. Empty the car. Don't transport stuff you don't have to. The less the car weights, the lower the FC and the better the performance. Try to glide to a stop (avoid braking). As long as a gear is engaged, but the foot lifted from the gas pedal you don't consume any petrol at all. Try to make use of that at traffic lights for example (of course others will try to overtake you then or cut in... :-/ ). Anything else I have forgotten? Anything you want to share? Hopefully this is nothing new to all of you, but if yes then maybe it helps. I LMFAO still wanna talk cok bout HUMMER?? who do you think you are? fools. you dont have money pump petrol, i sponsor you la. go get a life, talk cok master. |
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Feb 2 2012, 09:37 AM
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Senior Member
1,533 posts Joined: Aug 2007
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 what happened? |
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Feb 2 2012, 12:35 PM
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Senior Member
544 posts Joined: Jan 2009
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QUOTE(Aquariusdenz @ Feb 2 2012, 09:37 AM) what happened? On topic... I have managed to get the FC down to around 10L/100 km, but that was mostly highway etc., usually it is higher. But at least it's a bit lower due to the higher pressure, and the handling is improved. This post has been edited by kadajawi: Feb 2 2012, 12:37 PM |
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Feb 2 2012, 04:31 PM
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Senior Member
6,410 posts Joined: Jan 2003 From: MLK
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Foot decides everything. Also where you're travelling. My old 2.2 manual Accord, heavy footed daily drive to work full tank ~450KM, normal footed driving ~500KM, long distance drive ~600KM.
Tire pressure i have tried a lot. But better don't pump too much as you'll sacrifice comfort and grip. Quite comfortable with 230/220kPA now on 17" wheels. But yeah as said before, just focus on the driving and enjoy it as most "fuel saving" tips gives very minimal result that is not really worth the effort. |
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Feb 2 2012, 04:37 PM
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Senior Member
643 posts Joined: Dec 2006 From: In your Heart 
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i,am thinking to get tyre preassure moniter installed. can see your real-time tyre preassure - some of em got sell in garage sell
This post has been edited by Swordsmen: Feb 2 2012, 04:38 PM |
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Feb 2 2012, 04:49 PM
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Junior Member
80 posts Joined: Dec 2011 From: Kuala Lumpur
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Read this on one of those forwarded emails, you suppose to pump petrol at nite as the gas in the storage tank below the surface is less, so you get more petrol
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