fastnfurious Posted April 28, 2011 Share Posted April 28, 2011 have been using RON97 (MYR2.70 per litre) all these while but with the ever increasing fuel price globally, it makes more sense to use the much cheaper RON95 (MYR1.90 per litre) if it won't cause any side effects to our ingenius powerplant. would like to hear comments from you guys, thanks! Quote Link to comment Share on other sites More sharing options...
Josh Posted April 28, 2011 Share Posted April 28, 2011 There have been a few threads on this before. IIRC UK Specs are mapped for 95 RON and J-Specs are mapped for 98 RON. I always use Shell V-Power in mine as I want to keep her running as sweet and as cleanly as possible. Quote Link to comment Share on other sites More sharing options...
TTRickeh Posted April 28, 2011 Share Posted April 28, 2011 You are not allowed to complain about the price of fuel when you are paying 2 Ringgit a litre! I'll only put in 95 RON if I can't get 98+, even then it's only a small amount to get me to somewhere that does have it. Quote Link to comment Share on other sites More sharing options...
Thorin Posted April 28, 2011 Share Posted April 28, 2011 Stock it will be fine, I wouldn't want to run a BPU car on 95 though. The higher boost needs octane. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted April 29, 2011 Share Posted April 29, 2011 I have the issue back in SA were only 95oct is available at the pumps... Hence i bought a water meth kit and AFR gauge.. For daily use I am hope to run this with a low boost setting of 0.9bar, race days,Barrel of Sunoco 104 and crank the boost up... Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted April 29, 2011 Share Posted April 29, 2011 I ran my BPU J-Spec TT on 95 for about a year to save money, but eventually it developed a flat spot in the transition between turbo 1 and 2, which felt really odd. I don't know if it's harmful, but since going back to Tesco 99 it's been fine. I'd only say use it if you can't get better, or aren't blitzing it all the time. Quote Link to comment Share on other sites More sharing options...
fastnfurious Posted April 29, 2011 Author Share Posted April 29, 2011 holy cow... in this case, i'll continue to use RON97 SUL (Shell V-Power) as my Supra is BPUed. many thanks to you guys for the great advices! Quote Link to comment Share on other sites More sharing options...
RedM Posted April 29, 2011 Share Posted April 29, 2011 Couple of thoughts. With regard to JDM Supra being mapped to 98 ron did the Japanese even have 98ron back in the mid 90s? Doesn't the Japanese ron work out to be 3-4 points lower when converted to UK ron? It'd be about 95 ron if so. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted April 29, 2011 Share Posted April 29, 2011 Couple of thoughts. With regard to JDM Supra being mapped to 98 ron did the Japanese even have 98ron back in the mid 90s? Doesn't the Japanese ron work out to be 3-4 points lower when converted to UK ron? It'd be about 95 ron if so. Well I hear regular is 90ron here..not sure though.. The Hi Octane is 100ron, and my Supra says PRemium in the fuel flap.. So I think safer to stick to hi octane.. Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted May 15, 2011 Share Posted May 15, 2011 I ran my NA on standard 95 RON for the last 3 years but occasionally put 97 in, mostly when doing the bigger meets etc. (The NA's need all the help they can get! ). Since buying my BPU 6 speed I've been running it on 97/98 RON just to be safe, might try a half tank of 95 just to see if there is a noticeable difference Quote Link to comment Share on other sites More sharing options...
imi Posted May 15, 2011 Share Posted May 15, 2011 Does it make a difference for off boost normal driving Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted May 15, 2011 Share Posted May 15, 2011 wont make a difference for na or off boost driving , the higher octane just means its more resistant to det, ( pre ignition) and will offer a cooler burn , all good things when on boost , but for tootling around off boost no difference. but imho if you want to drive a high powerd forced induction car you put the highest available ron in and dont complain. otherwise buy a diesel and enjoy you 40 mpg. dr, out ! Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 15, 2011 Share Posted May 15, 2011 wont make a difference for na or off boost driving , the higher octane just means its more resistant to det, ( pre ignition) and will offer a cooler burn , all good things when on boost , but for tootling around off boost no difference. but imho if you want to drive a high powerd forced induction car you put the highest available ron in and dont complain. otherwise buy a diesel and enjoy you 40 mpg. dr, out ! If the ECU is self learning using knock sensors and ignition advance maps, it will make a difference when off boost - that's why NA cars get a benefit from higher octane fuel as well. The ECU advances ignition until it detects knock and then backs off. More ignition advance = more power. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted May 15, 2011 Share Posted May 15, 2011 on something with sky high compression id agree, but the na engines compression is not too high so i see no risc of det at 12dbtc at atmospheric pressure, but i know what your saying, on the ferrari 360 the ecu advances timeing when on better fuel. but personally i never found a differance with my na on the 2 fuels Quote Link to comment Share on other sites More sharing options...
Guest Tom Brown Posted May 16, 2011 Share Posted May 16, 2011 If you put £45 of V-power in and £35 of normal it will be around 97 oct anyway and a little cheaper to run i guess. Thats how I do it anyway. Quote Link to comment Share on other sites More sharing options...
Josh Posted May 16, 2011 Share Posted May 16, 2011 If you put £45 of V-power in and £35 of normal it will be around 97 oct anyway and a little cheaper to run i guess. Thats how I do it anyway. Seems like a lot of hassle for a few pounds! Quote Link to comment Share on other sites More sharing options...
Guest Tom Brown Posted May 16, 2011 Share Posted May 16, 2011 What about 5 seconds? Quote Link to comment Share on other sites More sharing options...
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