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Old 01-07-2003, 01:07   #1 (permalink)
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Question Is it bad to run my EL on BP Ultimate 98

Guys...

I have been running my EL on premium fuel for the last 6 months or so as I have found it to be a cleaner fuel. However it has an octane rating of "98", is this BAD for my engine?

Note... Engine is stock standard at the moment.

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Old 01-07-2003, 01:20   #2 (permalink)
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No. If things are running OK, should get slightly better fuel economy.
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Old 01-07-2003, 01:22   #3 (permalink)
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if you have an I6 them it has a knock sensor and will adjust the timing to suit. If you have a V8 then I wouldn't really bother as it has no knock sensor so no advantage!!
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Old 01-07-2003, 01:57   #4 (permalink)
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Quote:
Originally posted by TopGhia
No. If things are running OK, should get slightly better fuel economy.
Yeah... at least an extra 100-200K's better, depending on how you drive and where you drive.

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Old 01-07-2003, 02:36   #5 (permalink)
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I've wondered about the advantages, or lack thereof, with this stuff. I might give it a go myself and see what happens...

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Old 01-07-2003, 02:47   #6 (permalink)
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I have spoken to a chemical engineer in a large petrol company about this issue. In my car I am wasting money, sure I get better economy but when you work out the higher cost it ends up more expensive.
If your car is not tuned for it then chances are you are wasting your money. Also if you are a leadfoot don't bother, economy may even be slightly worse off.
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Old 01-07-2003, 05:07   #7 (permalink)
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I remember Wheels did a test sometime ago running Optimax and equivalents in VT Commodores and AU Falcons. The Falcons showed almost no improvements in economy or performance. The computers are only programmed to run on normal unleaded, so the spark advance only goes so far.

The Commodores, and I can testify to this, did much better. We have 6 VTs at work, and when they run on Optimax they get better fuel consumption and power. Being an American design engine, they are designed for better fuel.

Maybe if you advanced the base timing a few degrees, then it might make a difference with the better fuel. Or on older cars might make the engine run better.

Ive tried Optimax, BP Ultimate, and the Castrol stuff, on my EL Ghia, and could not see any difference at all. Apart from probably keeping the fuel system a little cleaner, I dont think it would be worth it.
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Old 01-07-2003, 05:13   #8 (permalink)
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My EL Ghia is a V8 and I have tried BP Ultimate a number of times and received no advantage, in terms of fuel consumption. If anyone is worried about the normal unleaded clogging up their fuel system then you should try out a product from Toyota, funnily enough called Toyota injector cleaner, in my old EB it was like breathing new life into the car. I have not used it on the EL as yet. But it is top stuff.
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Old 01-07-2003, 05:33   #9 (permalink)
 
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My EB manual clearly states "Unleaded Fule Only 91 Ron (or higher) Octane rating. WARNING using fule rated 95 Ron and higher may cause your vehicle to perform poorly and reduce the life of your engine."
But who cares, i Use it anyway and I do get more power and only moderatly better fule economy. Mind you I have the Powerchip Gold 98 installed wich is ment to use Premium Unleaded!
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Old 01-07-2003, 05:37   #10 (permalink)
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I use Mobil synergy 8000 and definitely get more out of my tank on that than premium. I recently drove to nsw and got 680 out of a tank of this stuff. Its runs a lot better. I will always use it.
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