i put some 89 in my stock car last week and i have noticed that i got some aweful gas milage. if i follow this trend, theoretically, i could put 93 in my rs and get better miles per gallon?



ps. the thread topic, dont worry about that little guy. (super troopers quote)

you shouldn't run anything less than 91 in a turbo car. You're gonna knock like a mofo.
The NT cars on the other hand are made to run on crap gas so if it's still pretty much stock, you could run 87 with no problems.

Turbo gas = 91 or more. Less is asking for disaster.

well, i only did it cuz gas was uber expensive and didnt feel like shelling out for 93. i did put about 4.5 gal of 93 mixed in. i havent been flooring it and havent noticed anything crazy.


btw. during my install of the oil pressure gauge, i installed the tap with some locktight, is there anything else i need to do to make sure it doesnt leak. and where are all your wires run(egt and oil pressure), i dont think i will have enough wire to make it to the gauge with the the way i have it running. the car is on jackstands and i am hoping to finish it up mostly tomorrow.

I use teflon tape to keep stuff from leaking. Loc-tite to keep things from loosening.
I used some speaker wire I had lying around for a few guages that wouldn't reach. I doubt it'll make much difference. I soldered them and taped them up pretty good.

i have all electrical gauges so they have connectors on the end. how would i extend those?

89 octane in a turbo DSM is moronic. You are really scaring me. I fear for your DSM's life.

it was only once.....i run 93 all the time till that last time.

now, i am starting to get better gas milage, probly cuz i dont go over 45% throttle since i put the 89 in. almost time to fill up again so 93 will be goin back in. i miss boost so much! the guages are almost done. pics on wednesday. they work, that has to say a little bit. no leaks so far from the oil probe. will there be a slight burning smell when the probe is heating up for the first couple of times. none of my wires are running near the manifold and i put the 02 wire out around the dipstick because i couldnt get the heatshield back on. i am almost in the clear, but i do have wires goin everywhere in the car now cuz i pulled part of the gauge cluster out to tinker with the fog light wiring. thus is the life of a "project" car.

I thought teflon tape was a no-no with anything even close to oil/coolant/boost because it flakes off and can clog things... :nono

I could be wrong... :shrug

Vandy

P.S. is the 3 bucks (max) you saved on 4.5 gallons of 89 worth the potential of melting rings, detonation, or anythign else like that? And no, premium gas has NOTHING to do with gas milage, unless you're using the wrong grade, getting detonation and your ECU is doing weird stuff with timing. THe only way it could possibly help, and this is a really big stretch, is you put it in a car that you had previously been using the wrong gas AND reset the ECU somehow, then noticed a slight power increase and compensated by using less throttle.

CAUTION: LONG (duh) BUT BASIC STUFF ABOUT OCTANE--skip to summary if you don't wanna read


Gasoline is made up of 6 and 8 carbon chains, called hexane and octane respectively. Hexane is highly prone to detonation under pressure and heat, while octane is much more resistant. However, gasoline needs to be more highly refined to get octane over hexane without adding lead as a stabilizer, artificially boosting the "octane". When people say the word "octane" they are actually not using the word correctly. They (and gas stations) are referring to an average of detonation tests done with a single piston running motor and somethign else, can't remember, not important. They are estimating the percentage of octane versus hexane in a given quantity of gas(89 = 89% octane). This is misleading, because many companies use additives that may highly resist heat detonation and give a "score" of 100+ "octane", which isn't possible, but the gasoline may be volatile under pressure because of the higher quantities of hexane. Its just an average, and its not even that accurate, which is scary enough and is also a reason to buy decent gas.


SUMMARY: "Octane" is supposed to mean how many 8 carbon chains but really means resistance to detonation...but most companies don't tell you which kind of detonation, whether its heat induced or pressure induced. 87 and 93 gas contains the same amount of energy.

Whats also gonna really blow your mind is that ALL gasoline for a given area is the same stuff, only the additives are different. The Cont. U.S. only has like 3 pipelines total...so the shell and exxon on the corner are really only selling you their additives.

Originally posted by Vandy420a
P.S. is the 3 bucks (max) you saved on 4.5 gallons of 89 worth the potential of melting rings, detonation, or anythign else like that? And no, premium gas has NOTHING to do with gas milage, unless you're using the wrong grade, getting detonation and your ECU is doing weird stuff with timing. THe only way it could possibly help, and this is a really big stretch, is you put it in a car that you had previously been using the wrong gas AND reset the ECU somehow, then noticed a slight power increase and compensated by using less throttle. CAUTION: LONG (duh) BUT BASIC STUFF ABOUT OCTANE--skip to summary if you don't wanna read Gasoline is made up of 6 and 8 carbon chains, called hexane and octane respectively. Hexane is highly prone to detonation under pressure and heat, while octane is much more resistant. However, gasoline needs to be more highly refined to get octane over hexane without adding lead as a stabilizer, artificially boosting the "octane". When people say the word "octane" they are actually not using the word correctly. They (and gas stations) are referring to an average of detonation tests done with a single piston running motor and somethign else, can't remember, not important. They are estimating the percentage of octane versus hexane in a given quantity of gas(89 = 89% octane). This is misleading, because many companies use additives that may highly resist heat detonation and give a "score" of 100+ "octane", which isn't possible, but the gasoline may be volatile under pressure because of the higher quantities of hexane. Its just an average, and its not even that accurate, which is scary enough and is also a reason to buy decent gas. SUMMARY: "Octane" is supposed to mean how many 8 carbon chains but really means resistance to detonation...but most companies don't tell you which kind of detonation, whether its heat induced or pressure induced. 87 and 93 gas contains the same amount of energy. Whats also gonna really blow your mind is that ALL gasoline for a given area is the same stuff, only the additives are different. The Cont. U.S. only has like 3 pipelines total...so the shell and exxon on the corner are really only selling you their additives.

lost my post, not retyping it. stupid work computer.....basically, i meant to put in 91 or 92, hit middle button, whoops, it was 89. not having any negative effects of 89 gas. barely hit 3k rpm since i filled the tank. been a lazy week. putting 93 in tomorrow night, WOT all the way back to interstate.

thanks for the info on gas, i learned a mass of knowledge.

Originally posted by Vandy420a
I thought teflon tape was a no-no with anything even close to oil/coolant/boost because it flakes off and can clog things... :nono I could be wrong... :shrug Vandy

good thing i didnt use it then, just in case. :-) i coated that baby with red loctite though, i mean COATED. ;-)

hello 93 octane and boost. :thumbsup sucks i had to walk a mile and a half at 4AM to get it.....long story......