Quick fuel Q

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scoobylaw
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Quick fuel Q

Post by scoobylaw » Sun Nov 07, 2010 8:04 pm

Hi
once you put 95ron fuel in the 6 then the power drops, anyone know what it drops to?
Also when you refill with 97:98;99ron does the car automatically increase it's power output or does it a resett like my old Subaru did?

Does anyone get better mpg from using higher octane fuel?
Thanks in advance

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RE: Quick fuel Q

Post by Maximo » Sun Nov 07, 2010 8:10 pm

I run mine on Tesco 99 and get about 350 - 400 out of a tank driving to work down the M4 to London. Anything else and it drops to around the 300 mark.
R18 GTX Estate > Saphire 2.0i Ghia > R19 16v > Vectra V6 SRi > M3 > RS6 Avant

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RE: Quick fuel Q

Post by scoobylaw » Sun Nov 07, 2010 8:22 pm

Thanks mate, are you saying "anything else" as in the fuel or the route

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Shoppinit
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RE: Quick fuel Q

Post by Shoppinit » Sun Nov 07, 2010 8:50 pm

When you put the 95 in, the engine starts to pink, so the ECU pulls the ignition timing to try and save your engine from damage. The actual effect this has on BHP is dependant on lots of other factors like the quality of your plugs, the precision of the mixture, etc. No one can say for sure.

But FWIW, when you know how the ECU struggles to protect your engine on 95 RON, it's not worth it.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
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Post by Fingers01 » Sun Nov 07, 2010 9:11 pm

page 216/217 of the owners manual goes into quite bit of detail about additives and cautions about the use of low octane fuels.

100,99,98,97,95 all OK

Below 95 perhaps not

It even suggests using "genuine VW/Audi fuel additives for petrol cars"

Me I stick to TESCO's MOMENTUM @ 99 RON

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Post by HYFR » Sun Nov 07, 2010 9:13 pm

T99 all the way

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Post by bam_bam » Sun Nov 07, 2010 9:35 pm

Shell V-Expensive only for Darth, T-99 if I stumble upon it.
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Post by Shoppinit » Sun Nov 07, 2010 10:37 pm

In my manual it says not to use 95 except in emergency and not to use full throttle.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Re: RE: Quick fuel Q

Post by Maximo » Mon Nov 08, 2010 9:57 pm

scoobylaw wrote:Thanks mate, are you saying "anything else" as in the fuel or the route
As in the fuel type used. Note to self, proof read what i type. :D

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Post by amanda1 » Mon Nov 08, 2010 11:55 pm

My fuel flap says nothing less than 95

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RS6Steve
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Post by RS6Steve » Tue Nov 09, 2010 9:40 am

amanda1 wrote:My fuel flap says nothing less than 95
Are you sure it does not stay Super Unleaded RON 97 min.....
Steve
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RS6 gone, R32 gone, M3 gone, Porsche Cayenne Turbo gone, Boring A6 saloon gone, Boring A6 Avant going in 5 weeks :D . Maybe RS5 or S5 Hatchback to come...

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Post by Shoppinit » Tue Nov 09, 2010 10:14 am

It's a no brainer. These cars are not supposed to run on 95 octane fuel. 97 or greater. 95 in an emergency and don't use full throttle.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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