Whizo

Hi Guys


Finally got my STI, picking it up Saturday. Silly question is this, I know the STI needs 97RON fuel but will 99RON Tesco Momentum be ok or do I have to stick to 97RON and nothing else, the STI is a UK car.


Thanks guys.

Hawkeye D

What year? 2.0 or 2.5?

My 2.5 STi loves V-Power from Shell (99RON), never put anything else in it.

Not sure on 2.0 STi's

richie001

iTrader: (3)

Tesco 99 or V-Power are fine.

Mark89dawson

I use either tesco or shell in mine but it does run different depending which I use it seems to prefer shell try them see what it likes best

Whizo

Its a 2006 2.5l


I will try both fuels and see if I and tell the difference, both Tesco and Shell are the same distance from my home so that isn't an issue.

Trinity

iTrader: (28)

Tesco is my favourite, like rocket fuel.

It will run fine on standard super, because the knock link will retard the ignition a few points where it needs to, hence why JDM's can run on 99, when Jap fuel is 102, you get a few points of retardation...does lose power though using lower grad, and with that 2.5 already being a bomb waiting to go off, treat it to the finest of everything, and never drive it , this way, it wont melt

Whizo

From what I've read the 2.5 is fine, you only encounter problems when you start to exceed the BHP limits of what the engine was designed for. So unless you start tuning it the 2.5 unit it pretty solid.

Trinity

iTrader: (28)

What you have read is VERY wrong.

EOEUMC

iTrader: (5)

Tesco momentum works just fine and is much kinder to your wallet

alcazar

iTrader: (2)

Tanker driver i know reckons TM and V-P come out of the same tank at the refinery......
And he delivers to both.

Steve001

iTrader: (7)

+1 unfortunately

gaborpapp

i got my 2.0 mapped to Shell V-power. NOS included.

however sometime i`m lazy and fill up from Tesco 99, and for whatever reason, everytime I use Tesco's petrol, I get less average Knock level and even less injector duty. (using apexi to display these values).

I would say you can't go wrong with any of these 2 petrols.

+ higher octane should translate in less chance of detonation, hence if you are mapped for example for a 95, and you put in a 103 octane petrol, you sould be fine. This is what I believe, maybe someone needs to correct me.

Whizo

Here's the link guys -


http://www.honestjohn.co.uk/news/leg...litre-engines/

Barxy

I agree with this.
Not sure why people seem to think their car runs differently, both the same octane.
Plus, tesco use fuel made by esso... And if you look deep into it im pretty sure esso and shell are both owned by the same people... Correct me if in wrong though.
I do know my shell work fuel card can be used at a shell, esso, or tesco...

Also, to the OP, you can use any fuel. Just dont use lower octane fuel than the car is mapped to. If the car is on the standard subaru UK map then you can use any UK fuel, but if its mapped to say 99ron then dont fill up with normal 95ron.

Tidgy

Vpower and tesco 99 gave differnt adatives thats why the behave different.

As far as what ron, 99 all the way, who ever said 97 ron is an *** clown

Trinity

iTrader: (28)

Dont believe a press report given out by Subaru to avoid paying warranty claims.

Jonnys3

Tesco Momentum for me every time. I only run on Shell vPower if I can't get to a Tesco filling station. I definitely seem to get slightly more MPG using Tesco Momentum than I do using Shell vPower and the car seems to perform better.

Mark89dawson

Mine definately runs different even the missis notices! it's faster on shell smoother on tesco and a good bit louder! plus I almost always get 190 out of a tank of shell and 210 on tesco

fatboy_coach

iTrader: (1)

Nope, here's a thread on my standard FSSH (up to me buying last August) Hatch STi, complete with pics of the 2 knackered pistons that have just been removed. It's currently at Subaru for You having a new short block with forged pistons fitted.

https://www.scoobynet.com/engine-man...uld-i-log.html

Jonnys3

Have a thorough read through this thread where you will get honest opinions of those people who have suffered engine failures and those of well respected engine tuners / builders too:

https://www.scoobynet.com/828990-200...ilures-56.html

Tidgy

Subaru PR BS only, 2.5 is known that it can be an issue standard, fsh etc etc

GeeDee

iTrader: (2)

Hi Alcazar

Tesco Momentum has methanol added to help achieve 99. It used to be 5% but now I notice it is 3% which brings it closer to Shell in terms of energy density but I'm not sure they can come from the same tank.

Whizo

I see your point regarding the failures, well, it's too late now so will have to wait and see, better start saving in case the worst does happen

Norman Dog

iTrader: (1)

I used to run my WRX on Sainsburys Super and it never missed a beat.

My STi has only ever been ran on V-Power, even got the iphone app for when I'm away to find the nearest Shell garage.

SouthWalesSam

iTrader: (1)

Shell every time.

Recently my, yellow light came on 50 miles from home and my local Shell station. I pulled into the nearest motorway services and put in 15 litres of BP Ultimate (?) for a quick splash and dash home.

What a mistake! Cue stuttering, hesitation and roughness all the way home.
It took a whole tankful of V-Power plus numerous 'diluting' top-ups before the car ran right again.

Never again.

Shell V-Power is just the cream!