Bf Standard Afrs

[ZAP]

If you are running Shell Optimax then that will be the problem.

It is not called Optisoot for nothing......

Try running BP Ultimate and the problem will be gone.

[SilXR6T]

I have only eve used BP ultimate in my car so that is why I was thinking it was the tune more than the fuel itself. Maybe its not just the right foot that causes such variation in the economy of these cars then. If there is so much variance in the T between runin mode and normal for AFRs, maybe this is another thing to keep an eye on when you get it serviced? Do ford usually check this?

[DBOSS]

Try running BP Ultimate and the problem will be gone.

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So will your pwr

That must be what your running Mal

[YOOT]

To be honest none of the 98 fuesl are 98, MRT Rally Forums published an article testing the actual rating of the fuels and how much power each one made in a tuned WRX which was retuned on the dyno for each fuel, which was completely drained and cleaned before the next brand was put in.

The highest performer was an Ethonal Blend 98 which made huge 20% gains over normal premium, then there was a large gap to the big three, BP, Shell and Caltex. Caltex was clearly ahead of the other 98 fuels and made the most power of the three (10-12% gain) and the other two both tested and were found to be only 96RON.

CAltex is the only fuel supplier to actively test its 98 fuels to make sure they are correct (ever seen those mobile fuel testing vans getting around with caltec on them).

Niether BP nor Shell would comment on the results.

The Ethanol Fuel was some independant supplier, can't remember the name.

Also tested in the same car was 5 different race fues all of which were 100 RON or higher and they all made the same power together (some 30% gain over 95 RON). high quality stuff and all very consistent.

The end result was that neither BP or Shell 98 was really 98, Caltex was the only true 98 fuel. And the highest performer was a small independent supplier.

[69ADY]

To be honest none of the 98 fuesl are 98, MRT Rally Forums published an article testing the actual rating of the fuels and how much power each one made in a tuned WRX which was retuned on the dyno for each fuel, which was completely drained and cleaned before the next brand was put in.

The highest performer was an Ethonal Blend 98 which made huge 20% gains over normal premium, then there was a large gap to the big three, BP, Shell and Caltex. Caltex was clearly ahead of the other 98 fuels and made the most power of the three (10-12% gain) and the other two both tested and were found to be only 96RON.

CAltex is the only fuel supplier to actively test its 98 fuels to make sure they are correct (ever seen those mobile fuel testing vans getting around with caltec on them).

Niether BP nor Shell would comment on the results.

The Ethanol Fuel was some independant supplier, can't remember the name.

Also tested in the same car was 5 different race fues all of which were 100 RON or higher and they all made the same power together (some 30% gain over 95 RON). high quality stuff and all very consistent.

The end result was that neither BP or Shell 98 was really 98, Caltex was the only true 98 fuel. And the highest performer was a small independent supplier.

←

Makes you wonder if the new Shell 100ron fuel we heard about, is really going to be 100ron... or will IT be a 98ish unstead

[SilXR6T]

To be honest none of the 98 fuesl are 98, MRT Rally Forums published an article testing the actual rating of the fuels and how much power each one made in a tuned WRX which was retuned on the dyno for each fuel, which was completely drained and cleaned before the next brand was put in.

The highest performer was an Ethonal Blend 98 which made huge 20% gains over normal premium, then there was a large gap to the big three, BP, Shell and Caltex. Caltex was clearly ahead of the other 98 fuels and made the most power of the three (10-12% gain) and the other two both tested and were found to be only 96RON.

CAltex is the only fuel supplier to actively test its 98 fuels to make sure they are correct (ever seen those mobile fuel testing vans getting around with caltec on them).

Niether BP nor Shell would comment on the results.

The Ethanol Fuel was some independant supplier, can't remember the name.

Also tested in the same car was 5 different race fues all of which were 100 RON or higher and they all made the same power together (some 30% gain over 95 RON). high quality stuff and all very consistent.

The end result was that neither BP or Shell 98 was really 98, Caltex was the only true 98 fuel. And the highest performer was a small independent supplier.

←

We hear many stories where people get bad batches of fuel or independent studies showing fuel is not what it seems, so who do we have actually keeping these guys honest?? Is there a body that does random checks and minimizes the risk to the consumer? Oil companies refine this fuel to correct levels, but Ive heard that hi octane fuel goes off quicker than standard fuel. I would be interested to know how long it takes fuel to degrade and how long it takes typically to get to the servo? Anyone have any idea?

[loopism]

To be honest none of the 98 fuesl are 98, MRT Rally Forums published an article testing the actual rating of the fuels and how much power each one made in a tuned WRX which was retuned on the dyno for each fuel, which was completely drained and cleaned before the next brand was put in.

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Got a link? I can't find it on MRT's site.

[YOOT]

http://www.lotustrophy.com.au/sites/lotusc...CommonFuels.pdf

Try that one - take you straight to the PDF.

[loopism]

To be honest none of the 98 fuesl are 98, MRT Rally Forums published an article testing the actual rating of the fuels and how much power each one made in a tuned WRX which was retuned on the dyno for each fuel, which was completely drained and cleaned before the next brand was put in.

←

So from reading the article as written, at no time was the actual RON/MON number of the fuels measured. So the results they saw were only valid for the time of purchase of those fuels, and can't be relied upon as authoritative.

Shame really, there was a lot of potential there to get some good information out to the enthusiast public.