Z premium 95 or BP Ultimate 98

[ryan1019]

Your thoughts as i have seen many forums saying both are ok even with a turbo,all 95 is a fuel with additives so why pay more? No knock in my S15 on 95 but will try a tank of 98 next time.

 

[meddler]

I run 95 unless I am doing a trackday. Mind you I am still running a standard computer with just a cat back exhaust, a K&N panel filter and 10psi boost.

 

[Auss15]

I run 95 unless I am doing a trackday. Mind you I am still running a standard computer with just a cat back exhaust, a K&N panel filter and 10psi boost.

Soft ............. I'm using 98 but have a lot more done then Meddler. 95 is fine if your'e not running higher boost or power upgrades.

 

[pegliobaglio]

mine is mapped to min 98 so always use shell v power 99 ron!

 

[CMR]

Depends what region of car you have, I'm guessing the ADM's were mapped for the lowest quality of fuel, where as the JDM ones are mapped for the equivalent of 100 ron.

 

[spoonman]

For the non NZ people the petrol station Z used to be called shell, it just got re-branded recently but shell (or Z) dont sell the 99oct that they do in the UK. Im still running a stock ECU but running 14psi or 1bar so i run 98 but if i have to use 95 i turn the boost down to 10psi

 

[ryan1019]

i seem to get more response from 95 than 98

 

[spoonman]

i seem to get more response from 95 than 98

is that bp 98? what boost are you running and what mods have been done to ya car

 

[ryan1019]

only a walbro pump and a K&N filter mostly stock

 

[spoonman]

so in other words your boost is going to be limited by the factory exhaust, and the side mount intercooler, are you getting .6 bar on the boost gauge? if thats the case then the 98 wont do a hell of alot as you are not making the boost that needs the higher octane.
Get a 3" turbo back exhaust, FMIC and some colder plugs and your car will go up in power by 40kw

 

[ryan1019]

yeah stock exhaust but no harm keeping it, ive got more boost since the K&N filter went in and better oil, have platinum plugs next time perhaps iridium

 

[Fruitbooter]

Sainsburys Super here!

98 RON and about £1.32 a litre too which is excellent compared to BP and Shell

 

[ryan1019]

 

[ryan1019]

fuel

Mobil Synergy 8000?

 

[spoonman]

Mobil Synergy 8000?

its a min 97/98 mix fuel so depending on the batch you may get 98 or you may only get 97 its a luck of the draw with that fuel, buts its all right to use

 

[ryan1019]

interesting well bp ultimate it is then

 

[empty_inside]

I'm trying to decide whether to get my next map done on cheap 95 or Shell 99 - cheap, readily available fuel vs more power, it's a tough one!

When I was on the factory map I used 99 just in case because I have manifold, 3" turbo back and FMIC which gave me 1.0 bar boost.