Premium Unleaded

Submitted: Friday, Jun 09, 2006 at 09:05
ThreadID: 34758 Views:3612 Replies:13 FollowUps:19
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Something miraculous happened as I was standing next to the petrol bowser last night - I had a thought...

With standard unleaded around the $1.40/L mark, and premium only about 5c/L more expensive (<4% difference), its got me thinking about whether premium really gives better fuel economy or whether its just a bunch of BS.

Does anyone have a good quantity of data on premium vs standard unleaded fuel economy?
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Reply By: Scoey (QLD) - Friday, Jun 09, 2006 at 09:08

Friday, Jun 09, 2006 at 09:08
I tried it in a 1FZ-FE 80 Series and whilst I didn't record any figures I didn't get a noticeable improvement in economy. Still about the same kms as I usually get!

Cheers
Scoey!
AnswerID: 177609

Follow Up By: BenSpoon - Friday, Jun 09, 2006 at 09:59

Friday, Jun 09, 2006 at 09:59
Scoey, try resetting the ECU when you fill your tanks- I got an extra 40km aout of my 150L using it. I didnt notice any difference in running or power though.
To reset the ECU, pull the fuse from the fuse panel near the steering wheel or disconnect your battery.
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Follow Up By: Scoey (QLD) - Friday, Jun 09, 2006 at 12:28

Friday, Jun 09, 2006 at 12:28
Really? Righto - I'll give that a shot! Cheers Ben!

Scoey!
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Follow Up By: Moose - Friday, Jun 09, 2006 at 13:20

Friday, Jun 09, 2006 at 13:20
Question for Ben - At what stage do I reset the ECU - just after filling or after running on new fuel for a while? Also should the motor be running or not when resetting? Thanks.
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Follow Up By: BenSpoon - Friday, Jun 09, 2006 at 13:57

Friday, Jun 09, 2006 at 13:57
Run the new fuel for a while so your car is running on that and not the regular ULP left in the lines. Reset it with the engine off, and go easy on the right boot for the first 20 mins or so of driving, or it will run ritch.
I heard once there is a pattern you can run it in with to help it remap, but no toyota dealer I have spoken to has heard of it- something like cycles of idle for 3 mins then air con for 3 mins, but im not sure and havent been able to confirm this anywhere.
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Reply By: Truckster (Vic) - Friday, Jun 09, 2006 at 09:09

Friday, Jun 09, 2006 at 09:09
Heard on radio last night RACV/NRMA complaining about the latest servo scam, is saying they are out of Unleaded to force people to buy PULP!

Didnt think there would be much differecne in profit for them
AnswerID: 177610

Follow Up By: Scoey (QLD) - Friday, Jun 09, 2006 at 09:37

Friday, Jun 09, 2006 at 09:37
Servo up in QLD ran out of ULP but as they had the price up on the board they were selling PULP at the same price as ULP! I was pretty happy with that! ;-)

Also heard on radio this morning that RACQ is questioning why WA (who is the only state not having a long weekend this weekend) is the only state that hasn't just had a big jump in fuel prices! I know, I know - it's obvious that servos bump their prices up next to long weekends and holidays but it still p!sses me off! ;-)

Scoey!
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Follow Up By: Michael ( Moss Vale NSW) - Friday, Jun 09, 2006 at 09:45

Friday, Jun 09, 2006 at 09:45
But even then, who is to know what you are really getting. Those tankers have partitioned tanks. The on the cheaper servos, who would know what you are getting from the local Liberty or Shifty Harry's Fuel... Michael.
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Follow Up By: Scoey (QLD) - Friday, Jun 09, 2006 at 12:29

Friday, Jun 09, 2006 at 12:29
Yeah I guess - it was a Woolies Servo and the tanker turned up while I was there. Apparently they only had no ULP for about 10mins.

Scoey!
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Reply By: howesy - Friday, Jun 09, 2006 at 09:26

Friday, Jun 09, 2006 at 09:26
the responsiveness of cars to PULP changes from vehicle to vehicle. At an extra 5 cents a litre filling the tank with 60 ltr's of PULP will only cost $3 more so why not try two or three tank fulls and carefully monitor the milage.
AnswerID: 177616

Reply By: Member - JohnR (Vic)&Moses - Friday, Jun 09, 2006 at 09:38

Friday, Jun 09, 2006 at 09:38
I have often used PULP in my little car engine and found it helped the economy. Not sure whose economy though. I thought I was getting further per tank but can get good distances with either now as I try a little harder.

Interesting to see the type of road makes quite a difference - more corners and hills mean higher consumption. With flatter roads and longer distances between stops and therefore exelleration points it's easier to get out over 1000 per 60 litre tank - which ever fuel is used. It depends a bit on my feeling at the time as to which I fill up with.
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Reply By: Geoff (Newcastle, NSW) - Friday, Jun 09, 2006 at 09:56

Friday, Jun 09, 2006 at 09:56
I've got an old VL Commodore and the PULP certainly makes a difference to its get up and go as well as the distance it travels on a tank. After a few tanks of normal ULP it starts to idle rough and be a little unco-operative of a morning.
That's the signal for a tank of PULP and it settles down again after that. So for me in that Commodore it does make a difference. Oh, I either use the BP up the road or the Shell a little farther away.

Had to laugh listening to the radio this morning.
The NRMA/RACQ/RACV/RACSA and all the other variants have a burr up their collective arses at the moment.
They've just realised the only capital city in Australia that hasn't had a petrol price hike this week is Perth!! And guess what else they realised?
It's the only state without a long weekend this weekend. Guess what they also just realised?
That the oil companies are probably trying to cash in on the extra travel of a long weekend!! Makes you glad to be a member!!

Geoff.
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Reply By: WDR - Friday, Jun 09, 2006 at 09:58

Friday, Jun 09, 2006 at 09:58
I have given up trying - too many variables - eg airconditioning, exact same roads, load in vehicle etc etc
I use 95 in Jack and 98 in Kluger - They have both shown that as their preference for performance
AnswerID: 177626

Reply By: Member - Stan (VIC) - Friday, Jun 09, 2006 at 10:59

Friday, Jun 09, 2006 at 10:59
Depends on the car and it the computer... Works on Prados.
Standard unleaded 91 octane - fuel economy around 15l per 100km...
Premium unleaded 98 octane - fuel economy around 13.5l per 100km...
As usual more economy on freeway vs city driving.

On prados computer takes up to 3000km to fully adjust, so you need to use the same fuel for 2-3 fuel tanks before you notice any difference.

AnswerID: 177635

Follow Up By: Wizard1 - Friday, Jun 09, 2006 at 12:21

Friday, Jun 09, 2006 at 12:21
13.5 - 15 L/100 km ouch! I'm getting 11.5 - 13/100L for a 95 series TD with normal travel to/from work, etc. Yes, you may argue that diesel is more expensive. Not today it isn't! Here ULP is 1c cheaper than diesel.. Got to love long weekends.
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Follow Up By: Member - Stan (VIC) - Friday, Jun 09, 2006 at 13:22

Friday, Jun 09, 2006 at 13:22
I got LPG as well, so you can say that my car uses 9 Liters per 100km and I am paying 80 cents per liter :))
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Reply By: Steve63 - Friday, Jun 09, 2006 at 12:02

Friday, Jun 09, 2006 at 12:02
There have been several miricales lately. Drove past a servo last night ULP 147.5 c/l, Diesel 139.5 c/l.

Steve
AnswerID: 177643

Follow Up By: Geoff (Newcastle, NSW) - Friday, Jun 09, 2006 at 12:19

Friday, Jun 09, 2006 at 12:19
Finally, diesel is back where it should be!
Cheaper than petrol.

Geoff.
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Follow Up By: Scoey (QLD) - Friday, Jun 09, 2006 at 12:32

Friday, Jun 09, 2006 at 12:32
Not having a go or anything, but why should diesel be cheaper than petrol? I'm just curious!

Cheers
Scoey!
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Follow Up By: Geoff (Newcastle, NSW) - Friday, Jun 09, 2006 at 12:40

Friday, Jun 09, 2006 at 12:40
hi Scoey,
Fair question.
Simple economics of production. How much finished product you get from a given unit of raw materials, in the case of petroleum products a barrell of crude.
In the refining process you actually get more diesel for less input energy from a barrell of crude than you do petrol.
And you get more petrol for less input energy from a barrell of crude than you do avgas.

So diesel is cheaper to produce than petrol which is cheaper to produce than anything more volatile, with the oil companies profit % added to both the diesel still should be cheaper.

Geoff.
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Follow Up By: Scoey (QLD) - Friday, Jun 09, 2006 at 13:05

Friday, Jun 09, 2006 at 13:05
Ahh gotcha! Yep fair enough - cheers for the info! ;-)

Scoey!
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Follow Up By: Rosco - Qld - Friday, Jun 09, 2006 at 14:11

Friday, Jun 09, 2006 at 14:11
That used to be my train of thought also Geoff. But now they claim if costs more, esp with the squillions they had to invest to get the sulphur down to the required level. I still reckon they're having a go at us all the same.

Cheers
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Follow Up By: Geoff (Newcastle, NSW) - Friday, Jun 09, 2006 at 14:15

Friday, Jun 09, 2006 at 14:15
Yes, I've heard that too Roscoe,
Funny thing, my job takes me into the two refineries in Sydney and has me deal directly with the production engineering people. The increase in cost for the sulphur content in their eye's is minimal to negligible.
Maybe the oil company spin doctors need to get out more?

Geoff.
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Reply By: Moose - Friday, Jun 09, 2006 at 13:26

Friday, Jun 09, 2006 at 13:26
From my experience around town driving makes no difference but last year on our outback jaunt I used premium and got much better economy. I had to check the numbers 3 times and I'm still not convinced that we managed to get the indicated economy. We're off again soon for a couple of weeks and I'm trying premium again to see if I can duplicate the results. Until then I don't think a one-off result meets your criteria of "good quantuty of data".
AnswerID: 177653

Reply By: TerraFirma - Friday, Jun 09, 2006 at 13:48

Friday, Jun 09, 2006 at 13:48
I'll let you all in on a little tip, Shell's new Unleaded is around 95-96 octane, pretty close to premium unleaded. If you can buy it for the same price as normal unleaded, 91 octane, then do it.! It's the closest thing you'll get to premium without having to pay for it.
AnswerID: 177658

Follow Up By: Member - MrBitchi (QLD) - Friday, Jun 09, 2006 at 14:47

Friday, Jun 09, 2006 at 14:47
Mate, my other car's a V8 Statesman so I thought I'd give the new shell a go. Waited till the fuel light came on and then filled 'er up.
Well..... ran OK and seemed to have a fraction more zip, but the fuel economy went out the door. Usage shot up by around 3LT /hundred. Have since switched back to standard ULP and usage has returned to normal.

Won't be using that stuff again ;-(
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FollowupID: 433813

Follow Up By: TerraFirma - Friday, Jun 09, 2006 at 15:34

Friday, Jun 09, 2006 at 15:34
I find that strange, don't know how you can use more fuel by using a higher octane fuel..? It sounds like you were playing with the extra grunt John , weren't ya..? And the xtra 3Lt's you used was the heavy pedal..! I don't recommend high octane fuel for those BIG V8's John, next thing you'll be burning out your tyres..! LOL

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Follow Up By: Member - MrBitchi (QLD) - Friday, Jun 09, 2006 at 15:43

Friday, Jun 09, 2006 at 15:43
Last year I did a trial in the Paj using Ethanol blend. Sometimes I got good economy, sometimes bad. The only conclusion I caould make after about 10 tanks of the stuff was that it was woefully inconsistant.
Thought I'd give the Shell stuff a try as surely the big refineries would get it right.....

I can only surmise that this was a "bad" batch and they haven't yet cured the consistency problems.

As for the extra grunt, didn't really notice any. I DO notice it when I put Optimax in it though ;-)))
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Reply By: Sand Man (SA) - Friday, Jun 09, 2006 at 14:02

Friday, Jun 09, 2006 at 14:02
Tried BP Ultimate for a while. (about 3 months)
There was a noticeable difference in power.
Could cruise up a hill in O/D that would normally force the autoshift to drop down.
The Hill I travel on a daily basis.

Couldn't get a conclusive result of any improvement in economy however and at 8 c/l more than standard ULP, I ceased using it.
Bill


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AnswerID: 177660

Reply By: howesy - Friday, Jun 09, 2006 at 16:11

Friday, Jun 09, 2006 at 16:11
I cant believe that fuel companies seriously expect us to believe that there is no such thing as price fixing going on. The industry needs to be re=-regulated as it was twenty odd years ago and have them present a case each time they seek a rise. Lets see Mr Howard says deregulation equals lower prices through more competition well so far I haven't seen one industry that has been de-regulated that hasn't resulted in skyrocketing prices due to company greed and higher profits. prime example is banks multi billion dollar six monthly profits where our top companies like BHP make 400 million a year. Yep de-regulation, cheaper fuel prices for the motorist. Politicians should be doused in it.
AnswerID: 177679

Follow Up By: Geoff (Newcastle, NSW) - Friday, Jun 09, 2006 at 17:14

Friday, Jun 09, 2006 at 17:14
"Politicians should be doused in it"

I like your sentiment but I think it's a waste of good fuel.
How about we just shoot them all with a ball of their own $hit?
In my view, no shortage of ammunition!

Geoff.
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Reply By: Ando80 - Friday, Jun 09, 2006 at 17:42

Friday, Jun 09, 2006 at 17:42
I had a 95 v8 DISCO a few years back that when using bp Ultimate i would get an extra 100km's out of 100 litres.. From memory it worked out about the same cost per km and I had a better range from one tank of fuel and seemed to have slightly more power.

Though my current 3 litre v6 Triton doesn't seem to make much difference. Maybe the lower technologically advanced engine benefits more from it???
AnswerID: 177706

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