95 octane in n/a?

[Scutch0]

As the title really, wondered if it's reasonably safe putting 95octane in my n/a as my local station is Always running out of super an I have to crawl to the next one in hope they have some

[Havard]

As the title really, wondered if it's reasonably safe putting 95octane in my n/a as my local station is Always running out of super an I have to crawl to the next one in hope they have some

 

I ran my NA four 3 and a half years on only 95 octane without any issues. That same car has now done 20k miles since I sold it and it's still going strong..!!

[RobSheffield]

Its more the turbos that 'need' high RON fuel, and even then only when on full boost. I wouldnt run a BPU Supra on 95 RON. The NA *should* be fine on 95 RON.

[Guest wantthatone]

95 is what i put in mine, cant say if it is a problem. car drives & pulls well

[Scutch0]

Really? I've had th car a year now and always put super in it... If I knew I'd be saving myself a few pennies!!

Thanks again guys!

[Guigsy]

Uk spec runs great on 95 can't tell the difference when I ran it on 99 for a while

[Sakey]

Always put 95 in mine and never had a problem.

[barneybrendan]

normally put whatever is there in my na even neat methanol .

[Lude]

UK supras are mapped for 95ron,

 

JDM models are mapped for 100, NA or TT.

 

for NAs i dont think its a problem running on 95, the TTs should be run on 98/99.

 

but to sumarise, in japan it is mapped for 100RON so putting 98/99 in will be fine

(even tho an NA woudnt require 100)

[MattP]

I only noticed a very slight difference in my n/a when i put v power or 99 momentum in best off sticking with 95 ron tbh

[Attero]

I've noticed a very slight difference in performance and a bit of difference in the fuel consumption. It seems to drink down 95 more than 98 I find.

[w41k3r]

it does more miles to a higher octane in my opinion its the only difference

[Dnk]

I doubt very much you'd notice any differance as the gain hp wise is going to be very small and be in single figures.

[Josh]

They did a test of Fifth Gear before where they tested a diesel car (can't remember which one) on normal fuel from BP and Shell then using BP Ultimate and Shell V-Power. They got about 5 or 6 bhp more IIRC.

 

I have used the best fuel in my Golf for about a year or so but last week the V-Power was 8p per litre more than normal fuel so I put the cheap stuff in and saved myself £5 or so. Couple more beers next time I go out

[Dnk]

If your car can run safely on 95 then your wasting your money putting the higher octane in it, lets here it for the trusty uk spec

[neo2810]

To be honest, 99 is a few pence more per litre, but you definately get better fuel consumption so it's probably even in terms of cost. The slight increase in power and the fact that (apparently) higher octane petrol is better for the engine tips me in favour of it.

[Dnk]

What differance in fuel consumption do you get ?

[Kirk]

I run 95 with the standard ecu in the car. Everytime I've used my mines I ran 99 as mines recommend this so have continued to do so till I get it down to ryan and see what its actualy doing.

[SupraMan Mk4]

I never knew that there were milage gains by using higher RON? I generally use Vpower/99/Ultimate in my NA, but if funds are tight I have no problem putting in half a tank of 95 Haven't experienced any problems or gains in truth between the two.

[David P]

95 RON is fine for an N/A with ignition timing @ 12o BTDC.

I am running my N/A on 99 RON with ignition timing @ 19o BTDC.

Edited December 22, 2010 by David P (see edit history)

[Tricky-Ricky]

Everybody seems to forget the fact that whatever ron you put in your Supra, if it knocks, the ECU will run a default map with

retarded timing anyway. Thats why they have knock sensors.

[Attero]

That's why you should really stick with one type of fuel. Right?

[Tricky-Ricky]

That's why you should really stick with one type of fuel. Right?

 

Well obviously its better to, running higher ron and not getting any knock, the ECU will run its intended timing map, so you then get the optimum performance.

However I'm not sure just how the ECU behaves once you stick with a lower octane fuel, whether it has a set number of times that it retries to run the normal timing map, and re encounters knock, before it reverts to the knock map as default?

[Dnk]

As i said if your car can run on 95 safely then for the gain you get why waste money, its not huge amounts but is over 30p a gallon going on average prices.

[Blackie]

I wouldnt run a BPU Supra on 95 RON.

 

Why not Rob?