What fuel do you use? Regular or high octane?

[Dragon Dave 1]

Just wondering??

When I got the VR6 the previous owner told me to use high octane, I have always used 99 octane fuel in my GTi and have continued with that.

A friend of mine who drives an AMG Mercedes says his car runs better on the 95 octane fuel from the same petrol station.

There was a test on Fifth Gear, where they tested the difference between 95 and 98 octane. They tested three cars on a rolling road. The first was a small economic car (can't remember which one) and it didn't make any difference to the power, the second car was a golf GTi (new one) and the high octane fuel gave a few more horsepower and then the third car was a Impreza WRX and the high octane fuel increased the power by 25bhp!

When I tried a tank of each in my GTi 8v, there wasn't much difference but the car did feel a little more aggressive with the higher octane. I would say that it gave me a few more horses.

The conclusion on Fifth Gear was that an economical car isn't designed to take advantage of the higher octane, whereas a performance engine will take advantage of it.

What do you run in you car?

Have you tried different fuels?

Do you notice the difference?

I tried BP 98 and Shell 95 & 99 in my GTi and I have only put Shell 99 in my VR6.

[craggsy 91]

normal 95 in mine.......not paying the price of super as it is

[cabrioman 6]

shell v power .... or if im feeling flush 99 from tesco .... and some 102 from bp for racing ....

[H13VYY 0]

normal fuel for me. however i do fill up with high octane once in about 10 fills.

[xyber 1]

Always use super, in my VR it was for the long term benefits and the same now with my S4, along with the fact Audi recommend it and many say they run crap on normal fuel

[Ben Seabrook 4]

normal fuel for me. however i do fill up with high octane once in about 10 fills.

same here

[J5KE F 0]

As tony.. Day to day normal, but on track and sprint as high as available plus octane booster

[Dragon Dave 1]

normal fuel for me. however i do fill up with high octane once in about 10 fills.

same here

Do you notice any difference with the high octane fuel?

[Dragon Dave 1]

Octane Booster eh???

Does this do good?? Can it do any harm?

Sounds like a bit of fun to me! I might try it.

[cabrioman 6]

As tony.. Day to day normal' date=' but on track and sprint as high as available plus octane booster

[/quote']

fancy some race fuel next time ????

[Dragon Dave 1]

race fuel??? Now your talking?

[cabrioman 6]

yeah ....

http://www.santapod.co.uk/m_merchandise.php?Category=6

[Ben Seabrook 4]

normal fuel for me. however i do fill up with high octane once in about 10 fills.

same here

Do you notice any difference with the high octane fuel?

nope !! do it more because I was told that it helps to clean your engine, now that could be a load of cobblers but the guy who told me knows his stuff and works in the petrochemical industry so I do trust him

[Dragon Dave 1]

110 Octane!!!!!!!!

What's that like? Do you notice a big difference?

That's expensive stuff......is it road legal?

[cabrioman 6]

err no its not road legal hence "race fuel" ....

[hvr6 88]

Shell Optimax everytime apart from when Gav gets impatient ;-)

[RAPgolfvr6182 2]

i used to use tesco 99 octane. found it to be better than the others

[Dragon Dave 1]

i used to use tesco 99 octane. found it to be better than the others

Tesco!! I have never tried tesco fuel, you think it's better than the others? Better than Shell 99?

[muttley 0]

i use whatever petrol station i'm near at the time, but always use super

[hvr6 88]

i used to use tesco 99 octane. found it to be better than the others

other half says the same but it's no cheaper than optimax (v power)

[RAPgolfvr6182 2]

i used to use tesco 99 octane. found it to be better than the others

other half says the same but it's no cheaper than optimax (v power)

i did a little test n found that i produced more power on 99 octane than i did on bp ultimate so thats why i went with tesco 99 i made another 4bhp with 99 octane than on bp on the same rolling road a week after i went to it.

[Just_Paul 0]

v-power every fill... don't know how much longer i can keep it up though! tried normal, but just feels a bit more lively and 'playful' with v power!

[Dragon Dave 1]

v-power every fill... feels a bit more lively and 'playful' with v power!

That's what I thought, I tried BP Ultimate (98 Octane), Shell Vpower (99 Octane) and Shell regular (95 octane), I think it goes better with higher octane.

[Dragon Dave 1]

i did a little test n found that i produced more power on 99 octane than i did on bp ultimate so thats why i went with tesco 99 i made another 4bhp with 99 octane than on bp on the same rolling road a week after i went to it.

That's the kind of answer I'm looking for. I think 4 bhp is quite a big difference between 99 or 98 octane fuel. You must lose quite a lot of power if you run it on 95 octane.

[H13VYY 0]

i personally think you cannot notice the difference unless you got a turbo car where it makes a bigger difference. ususally i think its all psychological.

on the M3 forum (m3 cutters) most of them use tesco supreme as they believe it was the most effective hen they carried out some test. my borther told me this as he's a member on there and he also uses tesco supreme.