What Fuel do you use??

[Nicely]

BP Ultimate is the worst here. No-one touches it. Several instances of unwell Skylines...

 

[S15R]

anyone here use 5% or 10% Ethanol on their car?

 

[paulphot]

I won't be testing it yet, other mods to do first. The MRT report showed that BP Ultimate actually had the lowest octane reading of the 98RON stuff. Read something like 97.4. It also provided the least power under a controlled test compared to Optimax and Caltex Vortex 98. There was something like 8kw ATW difference between BP and Vortex. They then did another run with E10 and got another 5kw ATW over the Vortex.

 

[Modder_J]

Is it possible to run the S15 on 95 RON ?

There's only one pump on the island that pumps out 98 RON and its emptied quite often (only 1 shipment of SUL per month) from Subaru's and Evo's needing it.

 

[Autech_NZ]

Yes it is possible to run them on 95, probably not best especially if yours is a turbo model or highly modded.

and it is probably best to reset your ecu if you want to change down to 95 permanently so it can 'Learn' again. Or get it tuned on 95 would be even better for the car if you cant get 98 all the time.

 

[S15R]

Autech S15's should run 100RON+, they were tuned for jap fuel only isnt it?

 

[Nicely]

You can't run JDM S15s on 95RON with an ECU remap. I wouldn't recommend less than 97 though, even with a remap. The S14 was mapped for 95 in Europe. Fuel economy and performance increased if you ran it on 97+...

 

[A'PEXi]

I think there has been some testing done with different ethanol mixes on a dyno with ecu tuning by MRT, I'll try dig up the article if anyone is interested.

My car is tuned on 98RON BP Ultimate and never had any problems, besides the ever increasing fuel prices

 

[Nicely]

I run either Opti (99.9p/litre - $2.50/litre) or Tesco 99 (97.9p/litre - $2.45/litre).

 

[S15R]

we only have 95RON when the s15 came out in nz

jdm s15 were running ok with 95RON and nissan recommended 95 RON too

 

[Nicely]

jdm s15 were running ok with 95RON and nissan recommended 95 RON too

You have got to be fooking joking. Have you seen the mahoosive lean spot in the standard JDM map?! Wouldn't want to put 95 anywhere near that...

 

[Jono]

Stupid Banbury, the best I can get in town is 97RON. No Shell Optimax and no Tesco 99.

 

[Yakozan]

Running stock boost or lower, 95RON might be OK. I wouldn't want to do it though.
There is one way to find out
Make sure you get a good knocking sensor and wideband lambda :thumbs:

 

[Nicely]

Jez couldn't believe how lean the map was when he mapped mine.

 

[Topper]

I run mine of 97/98 optimax stuff, and runs lean when coming onto boost :nod: so i def wouldnt go any lower :no:

 

[S15R]

jdm s15 were running ok with 95RON and nissan recommended 95 RON too

You have got to be fooking joking. Have you seen the mahoosive lean spot in the standard JDM map?! Wouldn't want to put 95 anywhere near that...

hmmm when mates dynoed their nz spec(jdm) s15, they were running rich
only thing we found is that stock ecu runs very advance timing at the mid range

im sure standard s15 runs 95RON fine but with mods dont go over 0.8bar

 

[Derek]

I'm running 95ron with a 4 octane booster..

 

[Nicely]

Brave man. Don't up the boost, will you...

 

[Derek]

I'm running .9 bar boost. Why so brave man?

Everyone in Ireland Runs Octane booster unless there car is mapped for 101ron. I'm using Millers cvl.

 

[Nicely]

Have you seen how much octane booster with 95RON actually raises the RON rating? Not what the manufacturers claim - the actual amount. Its nowhere near as much as its supposed to be (unless you get the really expensive stuff). Certainly no more than 97/98RON. I don't recommend anyone run more than 0.8 bar without a remap. And that's running 97/98RON. Mine was detting its tits off mid-range running Opti above 0.8...

However, its your car...