ulysees Posted May 21, 2007 Share Posted May 21, 2007 how much damage if any will i be doing to the engine if i run it on premium unleaded, i have tried them all and it seems to like premium but i was told not to use it, my car is a 93 import n/a any help would be great Link to comment Share on other sites More sharing options...
Al Massey Posted May 21, 2007 Share Posted May 21, 2007 do you mean super unleaded or normal? in japan they use 100 ron fuel so you wil be running it on way less than its used to or made for. but since youve got an n/a it doesnt matter too much but id be carefull,i use super all the time plus its better fuel anyway Link to comment Share on other sites More sharing options...
Thorin Posted May 21, 2007 Share Posted May 21, 2007 It'll be fine. Link to comment Share on other sites More sharing options...
ulysees Posted May 21, 2007 Author Share Posted May 21, 2007 do you mean super unleaded or normal? in japan they use 100 ron fuel so you wil be running it on way less than its used to or made for. but since youve got an n/a it doesnt matter too much but id be carefull,i use super all the time plus its better fuel anyway yes i mean normal Link to comment Share on other sites More sharing options...
hoff Posted May 21, 2007 Share Posted May 21, 2007 Most people like V-power. Shouldnt do any damage. Link to comment Share on other sites More sharing options...
ulysees Posted May 21, 2007 Author Share Posted May 21, 2007 one of the reasons i ask is that its pinking under load at low revs so i tried all sorts of unleaded to see if it would cure it but no luck, but it did like premium so i will stick to that if its not going to do any damage Link to comment Share on other sites More sharing options...
MarkTheBoy Posted May 21, 2007 Share Posted May 21, 2007 If your chopping and changing fuels often you might not feel the difference between them instantly. The general consensus is that it will take a good two or three tank fulls before the engine will perform any different. I use Tesco 99 ron in mine and it loves it, I dabbled in V-power for a while as well as BP Ultimate and the Tesco stuff seemed just as good as the others but was much cheaper. I try to steer clear of 95 ron fuel though as the engines were designed for higher octane stuff than that. (afaik) Link to comment Share on other sites More sharing options...
ulysees Posted May 21, 2007 Author Share Posted May 21, 2007 ok cheers guys but i dont know what to do now as i have been told normal is fine and also steer clear but going on what most people say i think im best to stay on higher octane stuff Link to comment Share on other sites More sharing options...
Guigsy Posted May 21, 2007 Share Posted May 21, 2007 i run mine on the tesco normal. im not sure if thats 97 or 95 and it does perfectly well. I might give it a bash on the 99 ron stuff though. Link to comment Share on other sites More sharing options...
ulysees Posted May 21, 2007 Author Share Posted May 21, 2007 think i might do a few tanks of normal for a while and see how it goes, but i must get the pinkin sorted aswell Link to comment Share on other sites More sharing options...
Havard Posted May 21, 2007 Share Posted May 21, 2007 I have been running on v-power in my NA and I have now decided to ditch the expensive fuel as I can't tell the difference!! H. Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted May 21, 2007 Share Posted May 21, 2007 I ran my NA on regular unleaded for 3 years with not one problem and so did the guy before me who had it for 7 years. Link to comment Share on other sites More sharing options...
Guigsy Posted May 21, 2007 Share Posted May 21, 2007 yeah for the record my car is a 97 and has been run on normal all its life. it ran fine passed a service and an mpt with only problem being a noisy rear wiper motor Link to comment Share on other sites More sharing options...
patrik Posted May 21, 2007 Share Posted May 21, 2007 I have taken this from http://mkiv.supras.org.nz/ In general the better the fuel the less chance of "pinking" (detonation). Fuel types - 96 & 98 RON? Will Supra run on these? Additives? Coming out of Japan, the Supra is happiest with 100RON fuel. The stock computer handles 98RON fuel (eg Shell Optimax, BP Ultra etc) quite well, and will tolerate 96RON (normal) premium, but forget normal (91RON) unleaded. If the car was fitted with an aftermarket ECU while it was still in Japan, it will almost certainly have been programmed to take advantage of the 100RON fuel over there (ie boost increased, timing advanced to the max), which means that it will just ping & detonate itself to death when it’s brought down here. Avoid unless you’ve got a stock ECU handy. Of all the octane boosters on the market, the only one that I’ve found that actually seems to work is R104+ (black bottle). Keep a bottle or 2 handy in the boot, & add half a bottle to a full tank of fuel when you’re out in the country somewhere & can’t find premium unleaded. Using these once in a while is okay, but according to the tech articles on http://www.mkiv.com, long-term use will leave red/orange deposits on the valves. New Zealand now has two suppliers of 98 octane fuel (BP Ultimate and Mobil 8000). Basically the higher the octane the better with turboed cars so use the highest octane fuel you can. Gull is looking into bringing out a fuel with 5% methanol in it which should be good octane, but no specifications are available yet. Link to comment Share on other sites More sharing options...
CarlT67 Posted May 21, 2007 Share Posted May 21, 2007 I run my on either V-Power or BP ultimate. Once filled up on normal shell and the car seemed to develop a high idle problem (once warm) of 1000 to 1250 Rpm. May just of been a coincidence and bad timing..... Link to comment Share on other sites More sharing options...
ulysees Posted May 21, 2007 Author Share Posted May 21, 2007 looks like its just up to me then cuz some say one and some say the other, think ill go for the cheapest one for now and see how it goes cuz im a tight git:d Link to comment Share on other sites More sharing options...
Guigsy Posted May 21, 2007 Share Posted May 21, 2007 i dont think ive ever seen anything lower than 95 in the uk. Link to comment Share on other sites More sharing options...
CarlT67 Posted May 21, 2007 Share Posted May 21, 2007 I also believe that the stock ECU "learns" the fuel and the best way/mix of using, reseting it means it will re-learn what fuel you put it and decide how to best cope. Please correct my statement if wrong.... think I got it right. Link to comment Share on other sites More sharing options...
ads274 Posted May 21, 2007 Share Posted May 21, 2007 Noob question time: What is pinking? I use v power simply because its better for the engine (all cars in general that is) plus i get better fuel economy which negates the extra cost anyway Link to comment Share on other sites More sharing options...
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