trebor69 Posted January 7, 2010 Share Posted January 7, 2010 (edited) Bought my car in nov , N/A J spec unmodded and didn't think about fuel , just kept putting unleaded in it .......especially with the price of super but something i just read on HOMER'S classified has got me thinking ..........should i be running it on super ? Will unleaded lead to excessive engine wear / damage ? Edited January 7, 2010 by trebor69 spelling (see edit history) Quote Link to comment Share on other sites More sharing options...
Homer Posted January 7, 2010 Share Posted January 7, 2010 Erm, which 'classified'? 95 ron will be fine on an NA, I hope I've never said otherwise! It's only the turbocharged jspecs that need the higher octane fuel. Quote Link to comment Share on other sites More sharing options...
jackso11 Posted January 7, 2010 Share Posted January 7, 2010 I run on 97, sometimes put 99 in and sometimes the old 95. Not really noticed a diffrence Quote Link to comment Share on other sites More sharing options...
scotty71 Posted January 7, 2010 Share Posted January 7, 2010 I run on 97, sometimes put 99 in and sometimes the old 95. Not really noticed a diffrence Shell Optimax 99 Ron all the way for this cookie:d scotty71 Quote Link to comment Share on other sites More sharing options...
Homer Posted January 7, 2010 Share Posted January 7, 2010 Shell Optimax 99 Ron all the way for this cookie:d Not trying to be cheeky, but why? (assuming you drive an NA!) Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 Erm, which 'classified'? 95 ron will be fine on an NA, I hope I've never said otherwise! It's only the turbocharged jspecs that need the higher octane fuel. I'm sorry HOMER , i do beg your pardon for my wild mistaken accusations , lol , it was MAWBY's classified . Quote Link to comment Share on other sites More sharing options...
benkei Posted January 7, 2010 Share Posted January 7, 2010 Aren't J-specs ECUs tuned for higher octane? Therfore will run better on our 'super' fuels? It's not imperative, however I'd feel more comfortable using V-Power in an import, be it n/a or turbo. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 7, 2010 Share Posted January 7, 2010 Actually its an interesting point, as in theory the N/A being a higher compression engine, and also mapped for the Japanese market so 100 RON fuel, it should really be run on super, I doubt you would notice any difference in normal everyday driving, but i suspect that at high RPMs it may well see a little det, and the ECU will keep switching to a default timing map, so a good few BHP could be lost as a result. Quote Link to comment Share on other sites More sharing options...
Wez Posted January 7, 2010 Share Posted January 7, 2010 I use normal unleaded in the NA, sometimes stick some V-Power in if I am doing a trackday with it. Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 I run on 97, sometimes put 99 in and sometimes the old 95. Not really noticed a diffrence Well this is what i was wondering .......it seems to run very well ........apart from reaching 2k on first start up before it warms and i've only used unleaded . I wonder if that is why ?????? Prob not. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted January 7, 2010 Share Posted January 7, 2010 If you value your engine on a tt surely its worth treating it right with the best fuel available for it. ie - super!! Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 Actually its an interesting point, as in theory the N/A being a higher compression engine, and also mapped for the Japanese market so 100 RON fuel, it should really be run on super, I doubt you would notice any difference in normal everyday driving, but i suspect that at high RPMs it may well see a little det, and the ECU will keep switching to a default timing map, so a good few BHP could be lost as a result. Yes i'd read about this 100 RON in japan and being a jspec ?????? Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 If you value your engine on a tt surely its worth treating it right with the best fuel available for it. ie - super!! I agree ........and if i could afford a TT :d Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 Shell Optimax 99 Ron all the way for this cookie:d scotty71 Don't blame you pal , what with those sensitive foreign turbos and such :d:d;) Quote Link to comment Share on other sites More sharing options...
CJ Posted January 7, 2010 Share Posted January 7, 2010 Seeing as how a lot of the J-specs on the site would have been manufactured around 1994 are we sure that 100 RON fuel was readily available in Japan at that time? If not, then they obviously could not have tuned them to accept it. Quote Link to comment Share on other sites More sharing options...
Scott Posted January 7, 2010 Share Posted January 7, 2010 I know that super does seem lots more expensive but have you actually looked at the difference in price in a tank of fuel? In your mind it is a big difference, in reality it's very little. If you feel the difference in price between super and regular a supra probably isn't the best bet. For what it's worth I think regular is absolutely fine on all variants of car as long as it is for every day driving. For high RPM or proper on boost driving I wouldn't fancy anything but super/vpower etc in my car. Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 Seeing as how a lot of the J-specs on the site would have been manufactured around 1994 are we sure that 100 RON fuel was readily available in Japan at that time? If not, then they obviously could not have tuned them to accept it. Being a 94 car , surely unleaded would have been the fuel ......wasn't 4 star still around then ? Quote Link to comment Share on other sites More sharing options...
CJ Posted January 7, 2010 Share Posted January 7, 2010 Being a 94 car , surely unleaded would have been the fuel ......wasn't 4 star still around then ? Huh? Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 I know that super does seem lots more expensive but have you actually looked at the difference in price in a tank of fuel? In your mind it is a big difference, in reality it's very little. If you feel the difference in price between super and regular a supra probably isn't the best bet. For what it's worth I think regular is absolutely fine on all variants of car as long as it is for every day driving. For high RPM or proper on boost driving I wouldn't fancy anything but super/vpower etc in my car. It is my daily and i'm too old for lead foot driving . Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 huh? lol Quote Link to comment Share on other sites More sharing options...
Scott Posted January 7, 2010 Share Posted January 7, 2010 It is my daily and i'm too old for lead foot driving . In that case I wouldn't give it a 2nd thought. Every now and again, when the weather is good, treat the old girl to the good stuff and take her for a blast. That is what I would do Quote Link to comment Share on other sites More sharing options...
trebor69 Posted January 7, 2010 Author Share Posted January 7, 2010 In that case I wouldn't give it a 2nd thought. Every now and again, when the weather is good, treat the old girl to the good stuff and take her for a blast. That is what I would do Sounds like a plan Quote Link to comment Share on other sites More sharing options...
scotty71 Posted January 7, 2010 Share Posted January 7, 2010 (edited) Not trying to be cheeky, but why? (assuming you drive an NA!) It was in reply to jackso11's comment he uses 97 in his TT, it wasnt cheeky Homer:d , no I have a TT so yes 99 Optimax and its the nearest fuel stop to me. When I picked it up last week had to stop on the M25 and it was 1.26 per litre (robbing F*****S) Scotty Edited January 7, 2010 by scotty71 (see edit history) Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted January 7, 2010 Share Posted January 7, 2010 I know that super does seem lots more expensive but have you actually looked at the difference in price in a tank of fuel? In your mind it is a big difference, in reality it's very little. If you feel the difference in price between super and regular a supra probably isn't the best bet. For what it's worth I think regular is absolutely fine on all variants of car as long as it is for every day driving. For high RPM or proper on boost driving I wouldn't fancy anything but super/vpower etc in my car. spot on. i started using a mix of e85 104 octane. 10 liters to a full tank good results and mpg Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 7, 2010 Share Posted January 7, 2010 Seeing as how a lot of the J-specs on the site would have been manufactured around 1994 are we sure that 100 RON fuel was readily available in Japan at that time? If not, then they obviously could not have tuned them to accept it. Yes i' pretty sure there fuel has always been higher RON due to the way its measured, similar to the US measurements. Quote Link to comment Share on other sites More sharing options...
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