do supras need premium gas???

[chefma70]

cause i read in several places they do. if the car requires premium i think il pass my really good condition mkiii to someone else soon and buy a motorcycle.latley i have been using the medium octain ?90??is this safe for the engine?

anyone in here use regular in their n/a and notice a difference from using premium.rodknock??

 

[suprahabsfan]

your n/a correct? 89 is fine unless you have pinging. In which case there may be someting wrong elsewhere.

 

[chefma70]

cool i think i stick with 89 for a year or 2 then decide if i wanna keep her.i hate gas prices so much. DUCATI 848 ftw(sf)<<

 

[91supran/a]

i run 87 in my NA and it runs great no pinging nothing runs like a champ.
just my two cents lol

 

[jetjock]

^ Your two cents adds up at the pump

Assuming the engine is stock you should run what the manual says. All more octane does is allow the knock control system to push the timing a bit. If you want that extra bit of performance go ahead and cough up for it. Otherwise it's a complete waste of money.

Fwiw I've run 87 in my turbo (what the book calls out) for 95&#37; of it's life (21 years) without issue.

 

[cartel1_950]

running 90 octane here in my turbo caused pinging and when i switched to 91 it stopped. my car was a bit of princess though so that might have had something to do with it

 

[Supratrbox2]

Most stations around me have stopped selling premium and plus is next. But I still buy 93+. The only time I ran less than 93 is when the dot head pumped in regular after I told him 3 times premium and my car ran like shit afterwards.
I also have a 1jz so maybe its more used to higher octanes.

 

[ms07s]

I use mid grade in my turbo without any problems.

 

[CyFi6]

I use 87 octane in my NA and its just fine. Just make sure you have your timing at the stock 10 degrees btdc.

 

[JustAnotherVictim]

I don't see the big deal about a $2 difference on a fill up between gas choices.

 

[OfnaRcR4]

i run 87 in my NA and it runs great no pinging nothing runs like a champ.
just my two cents lol

Perfect. 87 will be fine in an NA.

I run 93 in my twerbo tho.

 

[jessetooslow]

I was running 93, never felt a difference, went to 87 or whatever the cheaper is and it seems to be more peppy with no pinging, I go to the good stations, not the small guys.

 

[Solo1Supra]

I run 87 in my bone stock 87 Turbo with no problems at all.

 

[mirage83]

Maybe a foolish question, maybe not, but for a newly rebuilt engine should I just stick with 87 octane, or would there be any benefit to the unbroken-in engine if I went to a higher octane for a few thousand miles? Just curious since I'm about to be in that situation and since we're on the subject of gas thought I would ask.

 

[j3pz]

Maybe a foolish question, maybe not, but for a newly rebuilt engine should I just stick with 87 octane, or would there be any benefit to the unbroken-in engine if I went to a higher octane for a few thousand miles? Just curious since I'm about to be in that situation and since we're on the subject of gas thought I would ask.

i dont think its a foolish question at all. from what people have said in this thread, running 87 shouldnt be a problem, but for only a few dollars more you can add a little bit of insurance to your build.

 

[ViR2]

in EDM manual clearly says, that running 92 (87 in the states) is prohibited. But maybe thats just for EDM supras.

 

[annoyingrob]

Mine doesn't like anything below 94 octane.



It's not quite stock though.

 

[benchwarmer]

I don't see the big deal about a $2 difference on a fill up between gas choices.

This.

 

[CRE]

85 (R+M/2) + 17.5&#186;BTDC =

I am in Denver, so altitude is how I get away with 85. I don't imagine I'd need anything higher than 87 (worst case scenario 89) to keep things running strong without issues at lower altitudes though.

 

[dumbo]

octane level is resistance to burn, higher compression=more heat=pre ignition EDIT(detonation, my bad, pre-igntion is hot spots i think a whole different problem) if octance rating is not high enough

has very little to do with preformance, or saftey(unless you need it) bout 9.5:1 prolly should be using 92oct. and 10:1 proll abouve 92oct. correct me if i'm wrong.

and having aluminum heads dissipates heat faster, can get away with lower octance