Author Topic: Experiment - Fuel Efficiency  (Read 45122 times)

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Offline SSS

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Re: Experiment - Fuel Efficiency
« Reply #90 on: Mar 10, 2006, 11:04AM »
Those tests i believe were performed for your average joe schmo, not those after performance. If you can tune for it, the higher the octane the better.

Personally once i've sorted my fuel system, i only plan on running ethanol blend fuel due to it's high octane rating and price.

Offline Alister

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Re: Experiment - Fuel Efficiency
« Reply #91 on: Mar 11, 2006, 12:19AM »
After installing a high flow filter (K+N), i'm going to conduct the test again and see if there is a correlation between highflow filters and better fuel efficiency.

Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #92 on: Mar 14, 2006, 09:18AM »
caltex has been my worst fuel so far, doing the same driving (to work & 1 trip to the shops on the weekend) i used 53.5 litres to travel 539.5km which equates to 9.92 litres per 100km, still good fuel efficiency for the car, but just doesnt cut it compared to the other brands of fuel i've used.

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Offline Kranzy

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Re: Experiment - Fuel Efficiency
« Reply #93 on: Mar 14, 2006, 11:12AM »
Have you used BP Ultimate yet? Im using that in my car and have done ever since i got it. Seems to perform really well, will be interested to see the efficiency of it
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Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #94 on: Mar 14, 2006, 12:21PM »
i'm using bp ulp now, and after i've gone through that i'm starting on the premiums

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Offline proact

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Re: Experiment - Fuel Efficiency
« Reply #95 on: Mar 14, 2006, 05:38PM »
I think safeway servo is gibbing on fuel.
but i normally run 8000 from 8 ltr i get 110 kms.
2000 i get around 90 kms from 12 ltrs.
same in hot or cold weather just the take off lags.
my computer is setup for 8000. strange thing is my car loves 5 weight oil i was told i was nuts putting it in but it runs so smoth with it.
i have some new leads to go on some 8.6 some other injectors too 350 cc.
throwing the old 500cc out there crap third one has jammed up :P.
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Offline Jtas

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Re: Experiment - Fuel Efficiency
« Reply #96 on: Mar 14, 2006, 08:57PM »
Jesus.

Offline Jono

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Re: Experiment - Fuel Efficiency
« Reply #97 on: Mar 14, 2006, 09:10PM »
I think safeway servo is gibbing on fuel.
but i normally run 8000 from 8 ltr i get 110 kms.
2000 i get around 90 kms from 12 ltrs.
same in hot or cold weather just the take off lags.
my computer is setup for 8000. strange thing is my car loves 5 weight oil i was told i was nuts putting it in but it runs so smoth with it.
i have some new leads to go on some 8.6 some other injectors too 350 cc.
throwing the old 500cc out there crap third one has jammed up :P.
fun fun fun.

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« Last Edit: Mar 14, 2006, 10:42PM by Jono »
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Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #98 on: Mar 17, 2006, 08:40AM »
ok, just finsished up a tank of bp ulp, and i acheived a very nice 7.68 litres per 100km, there was even a little more city driving in this tank..

so from my little test it looks like bp is the most efficient fuel, closely followed by mobil, with shell up there with them and caltex lagging behind by a long way.

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Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #99 on: Mar 21, 2006, 10:13AM »
i dont think i'll post anything else about my fuel efficiency tests on the brands at the moment, but i went thru a tank of shell 95 octane, and i got 555km from 45.3 litres which is 8.16 litres per 100km which is only a bee's dick better than their normal unleaded (i filled at the same station) so i'm not overly impressed.. for the moment i'll stick to the regular ulps and i'll try get more efficiency by tuning the ecu.

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Offline Budgie

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Re: Experiment - Fuel Efficiency
« Reply #100 on: Mar 21, 2006, 10:25AM »
My car hates shell 95 octane noss.  Pinging like a bitch on it.  Runs ok on mobil 95 or BP 95 octane however.

On another note, I am currently running a tank of BP Ultimate for the first time ever.  My car absolutley loves it!  Compared to optimax or synergy 8000, the car has loads of power in the top end and its actually dropping boost towards the redline as well, 9psi down to 7psi from around 4500-5000rpm to shift point as I've got the boost controller wound all the way in (so its running 'stock' boost).

Car is faster than it has ever been, just from changing to BP Ultimate.  Fuel economy is much the same as any other fuel.
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Offline SSS

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Re: Experiment - Fuel Efficiency
« Reply #101 on: Mar 25, 2006, 10:47PM »
Just a side note, i think i have found the reason for my poor fuel economy: a stuffed thermostat. It was opening fully when the coolant got remotely up to temp, and was not maintaining a constant engine temperature like it should have by regulating the flow rate of coolant to the waterpump. It just stayed open basically.

This next tank of fuel should yield much better numbers.

Offline Budgie

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Re: Experiment - Fuel Efficiency
« Reply #102 on: Mar 26, 2006, 12:31AM »
Adam, I was just about to ask you in the KA-T thread if the thermostat was sticking open in your car... thats weird!
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Offline Milford

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Re: Experiment - Fuel Efficiency
« Reply #103 on: Mar 26, 2006, 08:21AM »
i seem to get about 12.5l/km with mostly city or suburban driving, with a bit of highway. on 98 octane
its pretty reasonable i guess, i didnt buy the bluebird for fuel economy

Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #104 on: May 18, 2006, 03:07PM »
wondering if anyone has noticed any difference in the new shell fuels? comparing a few premiums, this was my result..

caltex 98 - 480km off 54 litres! (11.25   litres per 100 km)
bp 95 - 570 off 48 litres (8.42   litres per 100 km)
shell optimax (before fuel efficiency formula) - 560 off 47 litres (8.39 litres per 100 km)

shell 95 with the new fuel efficiency formula - 606 off 49 litres (8.09 litres per 100 km)

i've done some mods to my car since my last posts on efficiency and my car has shown to be slightly less economical (i.e. closer to 9 litres er 100km on average)


caltex has been consistently poor in my results.. the 11.25/100km is actually worse than the result that i got with the standard unleaded.. so my only recommendation - steer well clear of caltex!
« Last Edit: May 18, 2006, 03:09PM by noss »

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Offline Budgie

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Re: Experiment - Fuel Efficiency
« Reply #105 on: May 18, 2006, 03:24PM »
Noss, thats almost entirely highway km though isn't it mate?

When the ECU is running in closed loop mode anyway (cruise, low throttle)...  Is that right mate?
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Offline RichTRX

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Re: Experiment - Fuel Efficiency
« Reply #106 on: May 18, 2006, 03:32PM »
I get between 580-630 on every tank with BP Ultimate. The only variable seems to be how much goes into the tank before the filler clicks. It seems to get more fuel in when the front of the car is pointed slightly down hill; less when slightly uphill. This is about 80% city driving, 20% highway. But I am usually a conservative driver.

ie. I might run the fuel down to approximately the same level, and consistently get 56l (I usually drive for approx. 40km after the fuel light comes on) in at one servo, yet consistently get 52l in at another servo. Seems to make all the difference.

Usually I'd be spitting chips if the fuel light came on before 500km, and would be a little bit sour if it came on eariler than 550km.
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Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #107 on: May 18, 2006, 03:40PM »
Noss, thats almost entirely highway km though isn't it mate?

When the ECU is running in closed loop mode anyway (cruise, low throttle)...  Is that right mate?

ah i've actually been doing a little bit more city driving, on each of those tanks i have tested since i've added the chip and afm to the car consisted of driving to work (120km each way on the fwy) 2 or 3 trips to mum & dads (about 20km each way normal burbs type stuff) and 1 trip to the city valley (about 45km each way much like springvale road or pennant hills rd for the sydney peeps)

so i'd say its about a 80-20 to 70-30 split if your looking at it from a time actually on the road perspective (opposed to km perspective).. i did two tanks of pure city & suburbs driving about 2 weeks ago and got around 510km to 45-ish litres both times around, once on mobil, once on shell. i tend to drive a bit harder when lights and traffic and corners are involved ::)
« Last Edit: May 18, 2006, 03:42PM by noss »

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Offline Budgie

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Re: Experiment - Fuel Efficiency
« Reply #108 on: May 18, 2006, 03:50PM »
haha... noss driving hard, thats a good one :P
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Offline noss

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Re: Experiment - Fuel Efficiency
« Reply #109 on: May 18, 2006, 04:32PM »
i want my car to last longer than your auto poobox :P

i dont thrash it, but i'm not docile.. happy? hehe.

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Offline Budgie

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Re: Experiment - Fuel Efficiency
« Reply #110 on: May 18, 2006, 04:39PM »
i want my car to last longer than your auto poobox :P

i dont thrash it, but i'm not docile.. happy? hehe.

hehe, my car loves it... and so does your mum noss :P
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Offline Alister

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Re: Experiment - Fuel Efficiency
« Reply #111 on: May 28, 2006, 08:46PM »
I just filled up with the new Shell ULP 95 today so i'll see if my KM/L changes. With 100% city driving on Optimax, i've recorded 13.9L/100KM in my VX LS1.
A few people at my work have been using the new fuel and reckon it has increased fuel consumption if anything but who knows how they've been testing it...

Offline Rake

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Re: Experiment - Fuel Efficiency
« Reply #112 on: May 28, 2006, 09:28PM »
Apparently an LS1 Edit (diff computer tune basically) gives you a good power increase and actually reduces fuel consumption. Might want to check it out Alister

Offline Alister

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Re: Experiment - Fuel Efficiency
« Reply #113 on: Jun 2, 2006, 08:22PM »
Apparently an LS1 Edit (diff computer tune basically) gives you a good power increase and actually reduces fuel consumption. Might want to check it out Alister

Yep, looked in to it already mate. The going rate for a MAF tune is $900 whilst MAFLESS is $1200. Cash I don't have at the moment though :(

Offline Rake

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Re: Experiment - Fuel Efficiency
« Reply #114 on: Jun 2, 2006, 09:03PM »
Well, try save up. I hear it's worth it.

Offline Alister

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Re: Experiment - Fuel Efficiency
« Reply #115 on: Jun 6, 2006, 01:05PM »
The new Shell ULP 95 is a winner for me, recorded 12.58L/100KM with 60% city and 40% highway driving and I was giving it a good boot occasionally :)
That's a crazy figure for a LS1, especially an unedited one. The last tank in my U13 was nearly as much as that!

Offline SSS

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Re: Experiment - Fuel Efficiency
« Reply #116 on: Jun 6, 2006, 01:58PM »
Funny thing is, the new V6 gets around 12.7L/100km.

Offline Sticky

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Re: Experiment - Fuel Efficiency
« Reply #117 on: Jun 6, 2006, 02:29PM »
might post up some of the figures ive recorded over the past fortnight:

using Bp Ultimate (98ron) 380km from 58L (15.2L/100km) all "city" driving

using Bp Ultimate again    455km from 57L (12.5L/100km) this was 50% city and 50% highway and included our cruise on this tank, ive also noticed if i the odd boot or three i give it each day, over the course of the tank, ill loose anywhere upto 100km off the final kilometerage (?) of the tank.

one thing ive heard though, this is when i went to book my dyno a while back, it that higher ron fuel detriorates quickly, the fella told me to fill up the morning of the dyno run, as 98ron fuel will drop to 95ron levels in 48hrs and so on, the only way to combat this is to drop some octane booster in when you fill up, and ive done this a few times now, it makes a marked difference to the final L/km.

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Offline Alister

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Re: Experiment - Fuel Efficiency
« Reply #118 on: Jun 12, 2006, 01:10AM »
Given the Optimax Extreme a try yet, Sticks?

I filled up with it last week and managed a poor 14.72L/100KM and that was with about 20L of ULP 95 left from the last tank!
I won't be trying it again, i've heard good things about ethanol fuel if you tune your car for it, but it's not doing anything great for my stock LS1.
Also, it's way overpriced - 17c/L?!? Bah!

Offline Chadza

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Re: Experiment - Fuel Efficiency
« Reply #119 on: Jun 12, 2006, 06:10PM »
some fresh figures from my latest fill up today:

Car: Pintara TRX Manual
Took: 45L
Travelled: 510km
Economy: 8.8L/100km
80% city 20% cruise and 100km/hr zones

Quite happy with that!
First a Silver TRX, then a White TRX...whats next? Game Boy-Clear style TRX?