jamesmacc

iTrader: (3)

i live on the isle of skye in the scottish highlands, there is 95 about 25 miles from me and there is 97 available about 100 miles.
if i get a wrx i would do a few mods and take it to be mapped to run well on 95, odviously its not going to be as smooth or powerfull as on 99 but atleast i still get to drive the car i realy want, im sure i could still get 260-300 if im carefull? will i have to stay away from prodrive wrx? i take it that will be mapped for 97-99?

TonyBurns

iTrader: (3)

Its probably just easier to find a nice standard model and if you want to modify then just get the car mapped on the 95 ron fuel

Tony

Jammedsix

As charleyskunkweed said:

His sti petrol cap says 98 Ron,my bugeye UK300 actually says use super unleaded so if it's saying that from back in 2001 then I would not use normal unleaded....I use v-power anyway and only use super if a shell is not available.
If I was ever caught out with no super and had to use unleaded then i would put as little as possible in to get me to a proper garage and stay off boost and under 3000 revs..

Steve

TonyBurns

iTrader: (3)

A UK300 can use 95 ron, does yours have the PPP fitted? (a uk 300 is just a tarted up wrx really, 5k's worth of options fitted )
As for no super unleaded, this is where octane booster is your friend put a couple of bottles in the boot and you are sorted

Tony

Jammedsix

Yes it has the ppp fitted..

CharlySkunkWeed

iTrader: (7)

I am not saying i recommend it , and i certinially dont use it (but have seen a few others using 95), i simply posted what it says in the book.

Dont shoot the messenger !

marcevs72

iTrader: (5)

the early jdm cars can run on anything(except sti) as back in early 90's they didnt have 100ron fuel at the pumps.

chocolate_o_brian

iTrader: (22)

The Jap fuel back then was still better than our 95 normal unleaded so the early JDM cars still will require SUL

Truss

iTrader: (2)

I was under the impression that a newage uk sti would pull the car back to stop det if crap fuel is used? Or have i pulled that out my ****?! im on vpower all the way btw.

tubbytommy

iTrader: (20)

yes i think thats correct it retards the ignition

jamesmacc

iTrader: (3)

is there any powerfull enough to take 95 up to 99?

TonyBurns

iTrader: (3)

NF octane booster will, millers octane plus adds 2 ron per 50ltrs per bottle.

Tony

jamesmacc

iTrader: (3)

just done a quick search and it seems like NF raises the octane quite a bit and the bottle treats 250 litres o fuel. thats nearly 5 tanks from a £15 bottle, is it too good to be true? i also read about people running a 10% methanol mix with 95 ron, apparantly is has the same quality as v-power when mixed and is quite cheap to buy, could i get away with keeping a stash in my shed, filling the car up with 95 and then adding the 10% methanol

Jammedsix

It all seems a bit OTT on adding Octane boosters,meths....for all the hassle and cost you may as well just go super or even v anyway

I pay £1.42ltr for v and it only cost more or less the price of a ltr for every 20ltr bought ...is it worth all the pissing about

tubbytommy

iTrader: (20)

i think the op is saying he cant get 99ron locally

Jammedsix

..understand that but he his also asking if they can run on 95 which his answer seems to be yes...however I' m just commenting on some of the other posts IMO that personally I can't see the reasoning behind adding boosters etc rather than just paying that extra few pence at the pump...it's more or less the same costing when you add it up at the end ...maybe I'm just lazy .....

mrmadcap

If subaru's were not capable of running on 95 Ron I'M would never sell a car in the uk.

Jammedsix

Agree...it's obviously anything with PPP and the STI and the uprated that require the higher Octane to run better...

addi monster

iTrader: (6)

An un mapped uk sti will not det on 95 ron fuel, subaru map these cars very very ritch as we all know, i had 95 ron in mine and tested it on the rollers and the afr was well in range and there was no det at all,

addi monster

iTrader: (6)

true to a point,
sul was available in japan around 1997 at the pumps so anything made before this could run on normal 95 ron fuel as no car manufacturer would make a car that cant be run on the fuel available (common sense)

TonyBurns

iTrader: (3)

It will det, it was pointed out very early on when the MY02 STI type UK came out, those dealers that ran them on 95, well you could hear it, very very easy to hear, those that ran it on 98, nope, no det (I was one of the first batch of people to drive the MY02 STI back when they were released, lovely mica black one).

You put 95 ron in one of these unmapped UK STI's (from 02 to now) and put your foot down a little, you will hear it detting.

Tony

chocolate_o_brian

iTrader: (22)

What about the pre '97 import WRX models, Tony. You're the man in the know, can they reliably be run on 95RON? What were the Japanese fuel ratings upto 1997 before 100RON kicked in

addi monster

iTrader: (6)

Tony its in the owners manual in black and white. but i guess you would know best as subaru only designed and built the car hey.

TonyBurns

iTrader: (3)

And yet alot of people on here have experienced det on 95 ron fuel in new age STI's, shame you have never owned one or you could try it out and there have even been engine failures in the early days due to people following that wonderful advice about running 95 ron in a new age STI, of course because its in the book means its perfectly ok but as you have not been around Subaru's that long you seem to miss out on the important stuff.....

Tony

TonyBurns

iTrader: (3)

Think it was the MY99 models where the 100 ron fuel maps kicked in, prior to that they were 98 ron afaik, as for running 95 in those.... errrrm no, its very hit and miss but the chances of engine failures due to det are considerably higher due to classics having naff all knock correction above 5k rpm.
Even the 22B type UK suffered from det if not run on 97+

Tony

chocolate_o_brian

iTrader: (22)

So you cannot run a 93-97 WRX import on 95 RON fuel with no issues. Cheers mate, s'all I wanted to know (as I ran my old '95 WRX import on SUL 6 years ago).

marcevs72

iTrader: (5)

i think you can run the early ones on 95 if they are completely standard but we have all added go faster goodies to them so not worth the risk.99 momentum in my 93 wrx and never had any problems but when get new stroker from enginetuner will get different maps for 95 and 99 in case get stuck anywhere crap

addi monster

iTrader: (6)

ohh tony .. you have no idea about me nor my cars..
hopefully a mapper will pop up on here and prove you wrong yet again like last time you claimed classics did not have a nps lmao..
now please dont make this personal as you always seem to do when you dont get your own way lol

TonyBurns

iTrader: (3)

keep on dreaming
As you dont know anything about these cars (you know you are the only person I know who has changed a nps on a classic ) and you have never driven a new age STI, let alone run one on 95 ron to see if it does det (its well documented on here if you look, even in my youthful days I would have agreed with you that it should be able to run on 95, but have been educated that they dont by people who have had them fail on 95 ron/heard them det on 95 ron fuel).
Of course you even run your classic wrx on 95 so if i were you i would fit a ks3/knocklink, it may enlighten you (and show you how nice the red/high level of det you get on 95 ron fuel on an early classic jdm).
Roll on the mappers, they will just confirm that new age STI (type uk) will happily det on 95 ron fuel, especially if pushed.

Tony

marcevs72

iTrader: (5)

morale of the story is unless you get it mapped for 95 always put 97-99 fuel in.my last classic was a 97 uk car and could run on 95 and was confirmed by local subaru dealer as it was a uk car they had to be able to run on standard 95 unleaded BUT he advised never to use it and use 97 as a minimum to stop det at high rpm.