Submitted: Monday, Feb 13, 2006 at 18:03
ThreadID: 30741 Views:2822 Replies:8 FollowUps:2
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Hi All.
Some time ago I seem to remember seeing something on TV about good mileage from premium unleaded fuel.

Any how, the family car ( a fuel injected magna) gets a run to town about once every 2 weeks (220km round trip) and the fuel consumption has got noticable bad.
The car runs fine if a little gutless but is in good tune and condition.

I was going to put a bottle of injector cleaner in but at the last minute thought I would try premium ulp instead as I had heard it cleans the motor up.

I have put 1.75 tanks of this in now & the difference in economy & power is very noticable.

I won't be going back to standard ulp any time soon.
Has anyone else had a good result like this or is our car a one off?

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Reply By: SteveL - Monday, Feb 13, 2006 at 18:21

Monday, Feb 13, 2006 at 18:21
I had a BA falcon ute and found after a few months of running on 91 octane it was running rough,even to the point of occasionally back firing.The problem disappeared as soon as I ran it on 95 octane.-Steve
AnswerID: 154741

Reply By: revhead307 - Monday, Feb 13, 2006 at 18:22

Monday, Feb 13, 2006 at 18:22
Some high end cars are factory tuned to run on nothing less.

used to run BP ultimate (98 Octane) in my small block chev. eliminated knocking, and would idle noticably smoother.

It also contains some valve lubricants...so it ran just fine on that instead of leaded.

If price is an issue...just run every 3rd or 4th tank as premium.

AnswerID: 154742

Reply By: phantom - Monday, Feb 13, 2006 at 18:22

Monday, Feb 13, 2006 at 18:22
Hi Eddy,
Yes, I ahd similar great results in my 80 Cruiser. I got 12% better fuel economy at a 6% increase in cost. That was over several tanks. You would'nt go back.
AnswerID: 154743

Follow Up By: Eddy - Monday, Feb 13, 2006 at 18:29

Monday, Feb 13, 2006 at 18:29

Your right I won't be going backwards.
Our fuel economy with the trailer is easily what you got & perhaps a bit more.
Hard to be specific on less than 2 tanks but when you have owned a vehicle for a long time you know when something changes for the better especially when it is connected the the hip pocket nerve!
FollowupID: 408721

Reply By: Graeme - Monday, Feb 13, 2006 at 19:33

Monday, Feb 13, 2006 at 19:33
Until I was able to get 98 octane I ran the VW Golf VR6 on 95 and got very average economy out of the 2.8 V6 but now with BP ultimate the economy and engine smoothness has returned. I will not use any other than 98 now.
AnswerID: 154764

Reply By: V8Diesel - Monday, Feb 13, 2006 at 20:55

Monday, Feb 13, 2006 at 20:55
BP Ultimate is the way to go. I had to run my GU on Shell unleaded at Munjina and was horrible. Filled up with PULP in Hedland and problem solvered.

Big difference. My old Z1000 Kawasaki ran so much better on Ultimate too.
AnswerID: 154773

Reply By: Member - laura B (NSW) - Monday, Feb 13, 2006 at 21:06

Monday, Feb 13, 2006 at 21:06
Work for Caltex - use Vortex 98 - its got the higher octane level ( 98 compared to just Vortex which is 95.6 )which gives power and also has the fuel injecter cleaner in it already...Used it in the Honda Civic and the Ford Futura and each got atleast 100km more around town....it can take 1 1/2- 2 tanks for it to work properly because the old frual needs to be out for it to work fully....LAndy is on lpg but when i use Vortex 98 and run it on petrol its the same...you may pay extra at the pump but its worth it over the amount a km's yo u get!!
Good luck....
Laura B
AnswerID: 154774

Follow Up By: flappa - Tuesday, Feb 14, 2006 at 09:30

Tuesday, Feb 14, 2006 at 09:30
I'm a Caltex convert.

I saw a noticable difference when I switched from ULP to Vortex. No pinging , better power , and approx 50k's extra per tank.

It was good because with dockets , the extra 6c per litre price was brought back to about around normal ULP prices.

What I didn't find , was any greater benefit from going to Vortex 98 over the normal Vortex fuel. Given the extra 10-12c per litre over ULP , IMO, the Vortex (95) made the most difference for the least amount.
FollowupID: 408833

Reply By: phil - Tuesday, Feb 14, 2006 at 12:13

Tuesday, Feb 14, 2006 at 12:13

I tried it with my 2000 Magna, and the premium was slightly worse.
If an engine is designed for 91 octane fuel there is no reason to expect that a higher octane fuel will do anything except drain your pocket even faster.

Phil I
AnswerID: 154887

Reply By: Member - Des - Tuesday, Feb 14, 2006 at 15:12

Tuesday, Feb 14, 2006 at 15:12
We have a TS Astra and 95 series Prado. Now running both on 98RON PULP. Both cars certainly run better. The question is whether it is worth the extra 10c/L over standard unleaded (about 8% at current prices).

This article at lcool.org argues that you can get substantially better fuel economy (as much as 15%) in 3.4L or 4L Prado using high octane petrol, but you need to persist for as long as maybe 7,000km. The theory is that the engine retunes itself to the higher octane, but only very slowly.

I am about 6,000km into the experiment, with one lapse to 95 RON when 98 wasn't available. At the start averaged about 14L/100km; last tank averaged 12. If sustained, that's about 14%. But it is a bit early to say definitively.

My brother has a BA Falcon ute and he has had good results with United's 98 RON + ethanol blend, called Boost.

But I'm sticking with pure 98RON. Unfortunately in Victoria it is only available from Shell or BP, not Caltex (yet). (Which means Coles vouchers are useful, but Safeway/Woolworths are not.)
AnswerID: 154914

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