yeshia Posted September 1, 2006 Share Posted September 1, 2006 I have a 2006 spec.B.... must I use 91 octane? some gas stations only have like 86, 89, 93.. can i get by with 89? How important is this? Thanks. Link to comment Share on other sites More sharing options...
azca Posted September 1, 2006 Share Posted September 1, 2006 91 or above only so get 93 if they don't have 91 Link to comment Share on other sites More sharing options...
SWP-LegacyGT Posted September 1, 2006 Share Posted September 1, 2006 The higher the better. Stick to 91 Octane and Above!! Link to comment Share on other sites More sharing options...
andrew_j Posted September 1, 2006 Share Posted September 1, 2006 Very. Actually the requirement is minimum 91 octane. However a little tid bit. If you have 1/2 tank of octane 93 you can purchase 89 octane and it essentially yields 91 octane. Of course this depends on how hard you hit those bumps to mix it all around etc. Link to comment Share on other sites More sharing options...
Steiner Posted September 1, 2006 Share Posted September 1, 2006 You can always just have someone lock the wastegate open and run whatever octane you like. Experience is something you don't get until right after you needed it. Link to comment Share on other sites More sharing options...
gt_ltd Posted September 1, 2006 Share Posted September 1, 2006 The higher the better. Stick to 91 Octane and Above!! Who's the chick in your av? Back to the topic... SOJ's site says the JDM Legacy turbo requires unleaded premium, but unleaded regular works too: 無鉛プレミアムガソリンが入手できない時は無鉛レギュラーガソリンを使うこともできますが、エンジン性能は低下します。 Google-translated: "When procuring unleaded premium gasoline, it can also use unleaded regular gasoline, but engine efficiency decreases. " I wonder if prolonged use of lower octane really damages the EJ25 on the US Legacy GT... This Space For Rent Link to comment Share on other sites More sharing options...
erito Posted September 1, 2006 Share Posted September 1, 2006 in sweden you can not get less than 95 octane, so no problem here only problem the gas is so ¤%*!!# expensive. Link to comment Share on other sites More sharing options...
wukindada Posted September 1, 2006 Share Posted September 1, 2006 I really wish our Sunoco stations would carry 94oct..... About the question though, why buy a performance sedan & then want to put reg unleaded in? You could have purchased the 2.5i & solved the problem. Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
itsme Posted September 1, 2006 Share Posted September 1, 2006 I wish I could get 93. All we have in Cali is 91 crap-tane Racer X FMIC for '05-'09 LGTs, '08+ WRX and '10+ LGT,'14+ FXT, and '15+ WRX TMIC Racerxengineering.com Link to comment Share on other sites More sharing options...
rc0032 Posted September 1, 2006 Share Posted September 1, 2006 I think we need a nOOb forum where people can come and ask these types of questions. Along with: Why is my car ILL.3? What Uppipe should I get? Help!!1111 my lights wont turn off Should I wrap that Uppipe? Along with many other such threads Link to comment Share on other sites More sharing options...
gt_ltd Posted September 1, 2006 Share Posted September 1, 2006 why buy a performance sedan & then want to put reg unleaded in? You could have purchased the 2.5i & solved the problem. I heard that JDM cars like Lancer EVO, WRX STi, Spec.B, etc require unleaded RON 100 which is only available in Japan, but those same cars are also sold in other places unmodified.. This Space For Rent Link to comment Share on other sites More sharing options...
Tuned200 Posted September 1, 2006 Share Posted September 1, 2006 I really wish our Sunoco stations would carry 94oct..... About the question though, why buy a performance sedan & then want to put reg unleaded in? You could have purchased the 2.5i & solved the problem. we got 94 at ours. after a trip to the dealer, the service manager told me they got a bull. to tell customers to try different octane levels...he told me to try 89, then 87. i told him the 2-3 dollar difference isnt worth the performance difference i may see. after all, i paid for 250 horses, i wanna use them all:icon_bigg Link to comment Share on other sites More sharing options...
andrew_j Posted September 1, 2006 Share Posted September 1, 2006 in sweden you can not get less than 95 octane, so no problem here only problem the gas is so ¤%*!!# expensive. Your octane rating method is different than the US I believe. I googled this http://www.stretcher.com/stories/01/010226m.cfm Kind of like I'd rather be paid 1000 EUR over $1000, different units Link to comment Share on other sites More sharing options...
wukindada Posted September 1, 2006 Share Posted September 1, 2006 Once my actuator situtation is resolved 100oct is going in, it's been a while since I've felt 24.5psi:icon_mrgr Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
deimos Posted September 1, 2006 Share Posted September 1, 2006 Use 91+, hell I use 94 regularly, the higher the octane the better it runs! Link to comment Share on other sites More sharing options...
UPSGuy Posted September 1, 2006 Share Posted September 1, 2006 The step to premium from midgrade: $0.15 per gallon A new engine if you blow it up: ~$4500.00 That's always been my logic. Link to comment Share on other sites More sharing options...
Xenonk Posted September 1, 2006 Share Posted September 1, 2006 turbo car = more octane available is better... you DONT want knocking. Keefe Link to comment Share on other sites More sharing options...
Vimy101 Posted September 1, 2006 Share Posted September 1, 2006 I still can't believe the confusion regarding "octane ratings". That's right, "ratings". What is really being described by those numbers on the pump are an "anti knock index." In areas where higher "octane" fuel is available, it is often ethanol that kicks up the "octane" rating. This doesn't mean that there is any increase in fuel energy. It only means that compressability has been increased so that the chances of premature is detonation decreased. Ethanol has a higher "octane" rating than straight gasoline but actually contains less BTUs (or energy). "Anti knock index" is the more accurate description of the pump numbers. Link to comment Share on other sites More sharing options...
bdisco Posted September 1, 2006 Share Posted September 1, 2006 http://en.wikipedia.org/wiki/Engine_knocking ^ link Link to comment Share on other sites More sharing options...
andrew_j Posted September 1, 2006 Share Posted September 1, 2006 I think we need a nOOb forum where people can come and ask these types of questions. Along with: Why is my car ILL.3? What Uppipe should I get? Help!!1111 my lights wont turn off Should I wrap that Uppipe? Along with many other such threads Easy add a sticky called Noob/FAQ and answer all the q's or link to good answers. Link to comment Share on other sites More sharing options...
Vimy101 Posted September 1, 2006 Share Posted September 1, 2006 http://en.wikipedia.org/wiki/Octane_rating Read the whole thing and let's clear up the confusion once and for all. Link to comment Share on other sites More sharing options...
rao Posted September 1, 2006 Share Posted September 1, 2006 To answer the question, you CAN use 87 octane if you want, but the ECU will pull timing and you will not be getting the maximum performance out of the motor. The car will not blow up, but it won't be as fast. This is for a stock car, if it is modified then it might (and probably does) have a higher minimum octane rrequirements. If you want to run lower octane then go for it. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
BoxerGT2.5 Posted September 1, 2006 Share Posted September 1, 2006 Put whatever you want in it. OBAMA......One Big Ass Mistake America! Link to comment Share on other sites More sharing options...
Irrational Exuberance Posted September 1, 2006 Share Posted September 1, 2006 I have a 2006 spec.B.... must I use 91 octane? some gas stations only have like 86, 89, 93.. can i get by with 89? How important is this? Thanks. if your in CA like i am your up shit creek anyway since 91 here is 89 everwhere else. when its cold, you can get away with a lower octane, but not if you want to go over 4k rpm and i still wouldnt reccomend it. "i like my women the way i like terrorists... ...screaming gods name and ready to explode." http://img255.imageshack.us/img255/5479/troy3nu5.jpg Link to comment Share on other sites More sharing options...
Vimy101 Posted September 1, 2006 Share Posted September 1, 2006 To answer the question, you CAN use 87 octane if you want, but the ECU will pull timing and you will not be getting the maximum performance out of the motor. The car will not blow up, but it won't be as fast. This is for a stock car, if it is modified then it might (and probably does) have a higher minimum octane rrequirements. If you want to run lower octane then go for it. The ECU will retard timing if the knock sensors are detecting knock but the damage will have already have been done. Knock like overheating must be avoided at all costs. If you are forced to run regular, then you want to avoid any heavy engine load situations but even that parameter can be exceeded. For instance, if you are using a winter blend fuel which has less "octane" enhancers than summer blend on a warm day you very well might start knocking. This is a situation one might run across in spring/summer change over period. Use premium. You get used to looking at only the bottom price on the station billboards. And besides, the price spread between regular and high grade has never been narrower thanks to the high price of gas now. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.