only 93 or 94

 

My owner's manual says to use 91 octane. I tried lower octane, and performance did suffer. As a result, I always buy at least 91. Currently, the station I go to has both 92 and 93, (besides 87 and 89), so I opt for the 92.

 

91 all the time, personal choice by experience, with the speed wich this engine is sparking, it will use less fuel to control the same explosion. better control = better response, less fuel = less carbon. not much but when you pass 100 000km, 0,5% can mean alot.

and I never gas at shell or petro-canada (in canada) or any station with additive in the fuel, says to clean your engine, but cleaning agents usually dry surfaces and again from my personal opinion, I want it to be lubed as much as possible.

to each is own, I put all my chances on my knowledge.

 

I've always use premium on my Lexus cars for years so I'm used to premium prices on my previous rotary cars I used regular 87 but on my 8 premium . I think is well worth it

 

Premium in the summer. Mid grade in winter.

 

My replacement engine has seen only Premium.

I tried mid-grade (never regular though) a few times with the original engine. It eventually lost compression. Probably not related whatsoever, but still... this time around I'm taking no chances.

 

Always Sunoco 93 Ultra- They sponsor stuff I like.

 

I suppose you are either one of two groups:

1. You take no chances and you just add premium 90+ Octane
2. You start with regular and if it creates problems you work your way up

So looking at the poll, about 60%-70% of the people here are running premium and the rest are either running midgrade or regular.

I suppose that people who are running 87/89 octane are having no problems so far.

 

50% of the people use regular which causes pinging.

Then they need a new engine and wonder why.

 

+1 chevron with techron. we have 91 out here so I get that.

or I get shell super duper whatever it is if no chevron station is handy

 

every once in a while i can find sunoco 95

 

I tried regular a few weeks ago. The car bucked when I went past about 30% throttle for the first few miles.

I put in premium after that. I used regular in my old RX-7 all the time, and the RX-8 was OK with it after it reset it's timing but obviously there was some advantage to running premium since the car had tuned itself well enough on premium to the point of bucking on regular. So I stay with premium.

 

87 octane esso gas and premix..

I found it strange when i use 89, the throtle response wasn't smooth but its fine with 87 ..

 

I just toss in 91 octane. New engine with less than 3k on it so might as well throw in the good stuff.

 

I use regular. I might try premium one day, just to see. I usually get Shell, since there is a station that is as cheap as any of the other cheap places around. I live in LA, where it's about 100*F right now, and don't have any detonation issues.

 

how many miles have you been running regular?

 

No you won't, because the PCM will pull back the timing if it's detected. However, you may be leaving some horsies on the table. Try a tank of at least 91 octane. I'll bet you can feel the difference. I know i did.

 

I don't know how some of you get away with 87, mine didn't like it at all.

 

Shell always up here in WA you get 10 cents off with your qfc card so its a win win with gas going down

 

Premium religiously

 

i get away with regular on my 8 all the time...HOWEVER, i will say that i will only buy regular from one gas station down the road from me. i dont have problems with regular gas from them but ive had problems with regular from other stations... so when im close enough to home i fill up on regular (currently $3.27/gal at that station), but if im out somewhere i go only to gas stations ive been to before and only get premium. ive had no problems. Miami, FL (basically sea-level)

 

V-power!!

 

Mid and high when I was broke, still broke but only 93 octane gas now in Texas

 

About 5,000 on this car.

 

Premium 93 only(Ethanol free when I can)......and Idemistu premix.