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Well with them talking about raising Fuel Costs again by another
2p in April the question of what to use is on my mind yet again.
So, lets ask/see what you guys use in yours and why??
I have used Unleaded in the past when I am desperate as I live 30min drive away from the nearest V-Power. But I am undecided wether or not it's a good idea in the long run?
normal unleaded in mine as it is a uk 1994 manual
normal unleaded in mine as it is a uk 1994 manual
Mine is a year older, does that matter then? When did it change?
Mine is also Jap-Spec!
Mine is a year older, does that matter then? When did it change?
Mine is also Jap-Spec!
J spec cars are set up to run on higher octane fuel. V-power is your friend. I still call it Optimax though.
Oh, and it's Myth...
Iirc you can use it, you just wont boost properly. You will egt less MPG too.
J spec cars are set up to run on higher octane fuel. V-power is your friend. I still call it Optimax though.
Oh, and it's Myth...
So is Super unleaded the same thing as V-Power or is the octane rate different again?
What will happen if I keep using just Unleaded?
What about mixing the two occasionaly?
So is Super unleaded the same thing as V-Power or is the octane rate different again?
What will happen if I keep using just Unleaded?
What about mixing the two occasionaly?
V-Power is 99ron, some super unleaded is usually is 97ron.
I always use V-Power. Probably best for a BPU car (and singles of course).
I only live 2 minutes away from my nearest shell, I've got 2 on my way to work, its very convenient! But lately I dont drive as much anymore as I used to because of the rip off price!
richardstock1
11-02-08, 12:17
Mine tends to miss under heavy (right foot) load :) on normal 95 so i always use optimax
miko_supra
11-02-08, 15:24
Mine tends to miss under heavy (right foot) load :) on normal 95 so i always use optimax
yeah i suffered from this too
RiceRocket
11-02-08, 15:45
All super unleaded is 97 RON (tbc?) apart from V-Power and Tesco 99.
Using unleaded is surely gonna shorten your Supra's health longevity unless it been remapped?
Wheres the super unleaded option? V power isnt the only one. Personally i only stick super in mine as its closer to what the JAP use as there standard fuel
I have an NA :) Standard unleaded (95RON) for me.
But the consensus is that for Jap TTs, you need one of the higher octane motion lotions. If you do decide that it's OK to use 95RON, keep an eye out for your mpg figures, because if they drop, it might negate any benefits from using the cheaper fuel.
SupraGirlie
11-02-08, 17:20
I use V-power or Tesco 99 in my N/A I just thinks it's worth the tiny bit extra tbh.
I'm sure I saw 102 ron recently.
normal unleaded is fine for uk tt's.
is this right the handbook suggests to use it
supradriver
11-02-08, 17:59
What sort of difference will higher octane fuel do too a NA. I herd it wont make any difference what unleaded fuel we used???
I use V-Power in my NA. Well usually, mainly for the cleaning properties it has. Normal unleaded im told should be fine in an NA.
supradriver
11-02-08, 18:04
I use V-Power in my NA. Well usually, mainly for the cleaning properties it has. Normal unleaded im told should be fine in an NA.
That’s all I use unleaded I just wounded if there was a difference?
I used v-power when I first got the NA and then changed to normal unleaded. I couldn't tell any difference in performance to be honest, only that I had a couple of quid left at the pump to buy some sweets.....:)
H.
supradriver
11-02-08, 18:08
I used v-power when I first got the NA and then changed to normal unleaded. I couldn't tell any difference in performance to be honest, only that I had a couple of quid left at the pump to buy some sweets.....:)
H.
lol yeah sounds right
I used v-power when I first got the NA and then changed to normal unleaded. I couldn't tell any difference in performance to be honest, only that I had a couple of quid left at the pump to buy some sweets.....:)
H.
or browse the top shelf;);)
I used v-power when I first got the NA and then changed to normal unleaded. I couldn't tell any difference in performance to be honest, only that I had a couple of quid left at the pump to buy some sweets.....:)
H.
I agree Paul. Not a noticable differance. It may give you an extra Pony on a dyno read out.
V power in mine,just wish there was a shell garage closer nearest is 10min drive.
If your running a standard UK, you will probably benefit from running normal UK fuel, as thats what the cars been mapped for. You might see slight benefits from Vpower etc, but its not absolut a must.
If your running a jap spec car, best to stick to highr RONs as thats what they use in jap land so will be mapped for it, lower rons MAY cause knock (especially in turbos)
If your running a tuned car, especially a turbo with higher boost, higher RON fuels become more of a must.
You can use normal fuel in any car, just dont boost the nuts off of it or you might start melting your pistons.
V power in mine,just wish there was a shell garage closer nearest is 10min drive.
Wish mine was 10 minutes lol. 30 minutes each way for me :(
supradriver
11-02-08, 18:35
If your running a standard UK, you will probably benefit from running normal UK fuel, as thats what the cars been mapped for. You might see slight benefits from Vpower etc, but its not absolut a must.
If your running a jap spec car, best to stick to highr RONs as thats what they use in jap land so will be mapped for it, lower rons MAY cause knock (especially in turbos)
If your running a tuned car, especially a turbo with higher boost, higher RON fuels become more of a must.
You can use normal fuel in any car, just dont boost the nuts off of it or you might start melting your pistons.
What did you mean by this bud?? (MAY cause knock)
Supranature
11-02-08, 18:51
What about off-the-shelf octane boosters?
Thing is with the Octane Boost, the bottle is almost £9 for I think 50 litres of petrol so in my case 50 liters of unleaded at a petrol station 6 miles away from me would cost me £54.45 + £9 for booster.
50 litres of Super Unleaded at the nearest petrol station that has it, 12 miles away from me, would cost me £55.45, so I wouldn't save an awful lot. May aswell then go for the higher octane fuel.
Supranature
11-02-08, 19:01
I was wondering was it ok to use in the event of being unable to get 99oct fuel?
What about off-the-shelf octane boosters?
these additives were tested on 5t gear and they gave a lower bhp reading after a dyno run.
RobSheffield
11-02-08, 19:03
Some clarification required here perhaps!
High octane fuel staves off Det, det kills engine, make your own choice.
NA is fine on normal or super, using higher grade is NOT a bad thing, just not neccesary
Higher octane than 'the japs' or 'the UK is designed for' is also ok, it just runs better/less chance of det on long motorway drags.
ON BPU, IMO Vpower is a minimum unless pootling around off boost in the winter.
Most additives dont increase the octane rating more than a tiny percent, not without putting about 2 gallons in, and then its risky anyway.
run on v-power in my uk tt with bpu...
tho it seems to bite more and more out of my wallet each month- and april rises wont be helping matters! :(
Supranature
11-02-08, 19:06
these additives were tested on 5t gear and they gave a lower bhp reading after a dyno run.
_
Think I've heard about this, but purely as a means to an end-ie.negatating potential damage and eliminating knock, do they serve a purpose???????????
supradriver
11-02-08, 19:10
whats (knock)
iv not come across this??
RobSheffield
11-02-08, 19:17
Knock is Det (or detonation.)
Its fuel exploding and not burning and its what will kill the engine, have a search :)
I used 95 in my Bmw the other week, got 60miles to 20quid
used 97 the week after and its alot higher (100ish)
Same driving styles too
Its obviosuly watered down round here lol
but you will notice gains
I always used 97 in the Supra
Unleaded in the NA vpower in the single :d
supradriver
11-02-08, 19:44
Knock is Det (or detonation.)
Its fuel exploding and not burning and its what will kill the engine, have a search :)
i will do
supradriver
11-02-08, 19:52
Iv had a search and I don’t know how you would notice if you would have knock, det.
Any one know????
:lol: at this thread.
I stick any old super and even normal unleaded in the NA :D
Vpower or BP ultimate and nothing else in the turbo, possibly some race gas but not bothered yet.
If you want to increase the octane of the fuel get some Toluene or race gas ;)
Toluene can be used as an octane booster in gasoline fuels used in internal combustion engines. Toluene at 86% by volume, fueled all the turbo Formula 1 teams in the 1980s.
http://en.wikipedia.org/wiki/Toluene
Iv had a search and I don’t know how you would notice if you would have knock, det.
Any one know????
1.2bar, crap fuel and missing/hesitation would be a slight indication ;)
My car was mapped on V-Power, so it's the only fuel I use now unless i'm caught short. If I am caught short and have to use differant fuel, I keep the boost down and have a light right foot. Ian C never heard any det whilst mapping my car with V-Power. :)
My car was mapped on V-Power, so it's the only fuel I use now unless i'm caught short. If I am caught short and have to use differant fuel, I keep the boost down and have a light right foot. Ian C never heard any det whilst mapping my car with V-Power. :)
Same for me, although my last mapping session was done during the vpower shortage so its now mapped on ultimate, therefore it only gets ultimate or vpower :thumbs:
supradriver
11-02-08, 20:09
1.2bar, crap fuel and missing/hesitation would be a slight indication ;)
In mine when I accelerate It goes smoothly up too about 5k then it seams too dump more fuel in the engine gets louder and it pushes me in my seat more.
Is it over fuelling???
In mine when I accelerate It goes smoothly up too about 5k then it seams too dump more fuel in the engine gets louder and it pushes me in my seat more.
Is it over fuelling???
How do you know its dumping more fuel in?
Seat of the pants dyno assumptions are useless.
supradriver
11-02-08, 20:16
How do you know its dumping more fuel in?
Seat of the pants dyno assumptions are useless.
I don’t know.
I guess it’s because it’s all smoother till 5000 rpm then it seams too get a bit of a boost from fuel. Should it be smooth through the whole rev range?
If that makes sense lol
RobSheffield
11-02-08, 20:18
I don’t know.
I guess it’s because it’s all smoother till 5000 rpm then it seams too get a bit of a boost from fuel. Should it be smooth through the whole rev range?
If that makes sense lol
I really wouldnt be too worried about det or overfuelling, you have an NA ;)
supradriver
11-02-08, 20:18
I really wouldnt be too worried about det or overfuelling, you have an NA ;)
why????
i use 97ron in my 93 n/a, ocassionally tesco 99, depending on where i am!
What did you mean by this bud?? (MAY cause knock)
Knock, det, detonation, pinking, just some of the names for it. Its caused mainly by pressure/heat causing the petrol to ignite prematurly in the cylender (before the spark). You tend to get this running higher than normal boost. Its why we use "cooler" plugs and fiddle with the ignition timing as well.
Its not a definative formule, you may get away with normal petrol, but you may not... best to air on the side of caution.
As has been said NA's wont suffer so badly, as you dont have boost to contend with, BUT jap spec NAs (all NA's i believe?) will probably run better on higher RON, as thats what they were mapped for (in japan):cool:
I used to use V-Power too wherever possible. Occasionally I'd stick some Tesco 99 avec Flake in but it never felt as good.
I also found it rather ironic that, one week after selling the Supe, I got a package from Shell upgrading me from the Shell Drivers Club to the V-Power Club because I used to buy rather a lot of it.
i have never had aproblem with normal unleaded on mine i am going on a dyno day soon i will have to see what its like on there
In mine when I accelerate It goes smoothly up too about 5k then it seams too dump more fuel in the engine gets louder and it pushes me in my seat more.
Is it over fuelling???
surely thats the second turbo kicking in at around 5k that does that ?!
...normally causes a smilling sensation across one's face...
;)
surely thats the second turbo kicking in at around 5k that does that ?!
...normally causes a smilling sensation across one's face...
;)
If your second turbo is coming in at 5k rpm, you've got a problem.
;)
Tesco 99 all the way for me. It's 105.9 here as opposed to over 110 for V-Power.
dr_blackman
12-02-08, 12:03
There's a big difference from using standard unleaded to using Vpower in my na, Vpower just makes the car feel smoother and more responsive. But with petrol prices round here she's been on normal bp lately.
Some dodgy info posted in this thread. Forget the "jap cars are designed to use higher octane" rubbish...
In an NA - Normal unleaded is perfectly fine, you might notice a slight performance increase using Super, but it's certainly not needed.
In a TT (UK, Jap, Euro, whatever) - I wouldn't use anything less than Super unleaded (or V-Power, or Ultimate, or Tesco 99, etc. etc.). It might be ok on normal unleaded but I certainly wouldn't want to give it much boost.
All of these Octane boosters you get in little bottles are pointless snake oil, but if they make you feel better go for it ;) The only useful "octane booster" is Toluene as already mentioned. 10% mix is safe.
So Tesco 99 isn't just cheap rubbish then?? Poeple can recommend it I guess?
May try some.
So Tesco 99 isn't just cheap rubbish then?? Poeple can recommend it I guess?
May try some.
It has to meet the same stringent safety and quality requirements as every other fuel, it's very good by all accounts, I just don't know of anywhere near me that sells it.
Some dodgy info posted in this thread. Forget the "jap cars are designed to use higher octane" rubbish...
In an NA - Normal unleaded is perfectly fine, you might notice a slight performance increase using Super, but it's certainly not needed.
In a TT (UK, Jap, Euro, whatever) - I wouldn't use anything less than Super unleaded (or V-Power, or Ultimate, or Tesco 99, etc. etc.). It might be ok on normal unleaded but I certainly wouldn't want to give it much boost.
All of these Octane boosters you get in little bottles are pointless snake oil, but if they make you feel better go for it ;) The only useful "octane booster" is Toluene as already mentioned. 10% mix is safe.
so when uk cars were built could you buy super unleaded.
just seems wierd that the owners manual says use 95 ron in it and i am sure people used to drive them quite hard then.
There's a big difference from using standard unleaded to using Vpower in my na, Vpower just makes the car feel smoother and more responsive. But with petrol prices round here she's been on normal bp lately.
Agreed :thumbs: For the amount of mileage that most of us do in our supra's, even we NA's :p a few pence more a litre doesnt make a massive hole in the pocket and personally I'd rather put the best quality fuel in my supe just as I'd only put the best quality mods/parts on/in it. Vpower is supposed to clean and prolong the longevity of the engine which is all good as most of our supra's are getting on a bit now anyway ;)
Lx
It has to meet the same stringent safety and quality requirements as every other fuel, it's very good by all accounts, I just don't know of anywhere near me that sells it.
Nor me, just found a list of Petrol Station that sells Tesco 99, not a single one in Cornwall though,lol
I'd say in N/A's unleaded is fine but as said previously VPower would be a little smoother etc but that should be the same in any car.
As far as tubby's go Uk's are mapped to 95 ron so they are fine but J-Specs are mapped to 100ron (i think). Cutting it all the way down to 95 would give a higher risk of Det at higher revs would it not?
For the sake of an extra £4 a tank i'll stick with V-Power.
Scott =op
OK so long story cut short. If I always fill with Super Unleaded or V-power but the occasional 20-30 quits of unleaded when I get cought short it will not kill my engine??
As long as you don't drive it hard it should be fine.
I've been stuck and put regular in both the MR2 and the Supra. Drove them very carefully though.
Scott =op
Super Unleaded has been available since the late 80's as far as I'm aware. Are people aware that Japan also has different fuel grades just like we do? Many people seem eager to say "it's a Japanese car, therefore it needs super unleaded!!!1!". I stick by my comments in the previous post.
Super Unleaded has been available since the late 80's as far as I'm aware. Are people aware that Japan also has different fuel grades just like we do? Many people seem eager to say "it's a Japanese car, therefore it needs super unleaded!!!1!". I stick by my comments in the previous post.
From experience, all imported SX's are mapped as standard to higher ron fuel - as thats the "norm" in japan (they run 1 bar of boost as standard and have different degree's of timing - something the uk ones cant do without SU). The norm over here is 95, which is what the UK ones are mapped to.
So unless toyota either chose to ignore this difference in fuel, or fudged the maps in some way ill stick by my comments that jap cars should be run on higher ron fuel.
At the end of the day, most of us dont drive like grannys, so should be using SU to be on the safe side, certainly so in the case of TT's. NA's youll get away with 95ron, but as has been said by a few owners previously - they run better on SU - possibly as its closer to what they were mapped for.
so when uk cars were built could you buy super unleaded.
just seems wierd that the owners manual says use 95 ron in it and i am sure people used to drive them quite hard then.
95 or higher....is what it says...for a stock UK car, running stock boost ;)
You are not running stock boost with a double decat.....
So unless toyota either chose to ignore this difference in fuel, or fudged the maps in some way ill stick by my comments that jap cars should be run on higher ron fuel.
FFS. So your basic crappy Toyota Aygo would need to run 100RON fuel if it's an import would it? That's what I'm getting at here, people just jump in and say "Jap Car = Must use SUL" regardless.
High performance turbo cars really should run on SUL yes, and I personally wouldn't use anything less. This doesn't matter be it an official UK car or a Jap import. But equally they're not going to explode when pulling out of the petrol station if you've filled up with normal unleaded. There has to be some leeway due to variances in fuel.
FFS. So your basic crappy Toyota Aygo would need to run 100RON fuel if it's an import would it? That's what I'm getting at here, people just jump in and say "Jap Car = Must use SUL" regardless.
My comments only covered performance cars, i didnt think many Aygo owners would read it and take note, ill rememebr to be more specific in future.:innocent:
95 or higher....is what it says...for a stock UK car, running stock boost ;)
You are not running stock boost with a double decat.....
thats the answer i have been looking for will have to change over cheers
My comments only covered performance cars, i didnt think many Aygo owners would read it and take note, ill rememebr to be more specific in future.:innocent:
Can't remember exactly what show i was watching but i think it may have been Fifth Gear. They tested all manor of cars using regular unleaded and then using V-Power. It did make a small difference to GTi Golfs etc but no difference at all to smaller cars. The biggest difference was on an STi Impreza. Think it ended up with almost 30bhp more.
Surely its only performance cars that have a high risk of detonation due to low octane fuel?
Scott =op
BP ultimate most of the time, although filled up for the first time in a few months and got the shock of my life, HOW BLOODY EXPENSIVE:blink:
bloody tax man:taped:
BP ultimate most of the time, although filled up for the first time in a few months and got the shock of my life, HOW BLOODY EXPENSIVE:blink:
bloody tax man:taped:
I used that stuff once when i was stuck on a motorway and i felt the car was a little sluggish and spluttery.
Was greatful to get the v-power back in. I have even used 95 ron before and it wasn't as bad as the bp ultimate. Maybe i got a bad batch lol.
Scott =op
Surely its only performance cars that have a high risk of detonation due to low octane fuel?
Scott =op
Spot on, and mainly turbos due to the pressure of boost etc.
BP ultimate most of the time, although filled up for the first time in a few months and got the shock of my life, HOW BLOODY EXPENSIVE:blink:
bloody tax man:taped:
It's not so much the taxman as the oil companies. They make a lot more money selling premium fuel, compared to the small amount made by selling the normal stuff.
It's not so much the taxman as the oil companies. They make a lot more money selling premium fuel, compared to the small amount made by selling the normal stuff.
Complete rubbish, it's the tax man. Tax makes up ~80% of the fuel price, the actual cost of the oil is minimal compared.
diesel in iraq is only 1p a litre.
bit of a dodgy drive though
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