K8 87 or 91 Octane?
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fowljesse
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Re: K8 87 or 91 Octane?
For MPG, research has proven that 89 octane is the best value. Higher octane generally nets more MPG, but cost per mile is best with mid grade. I get 35 MPG FWY in my stock GS with 1.5 oz. Acetone per tank, and 33 in my ZE.
'93 GS - P&P DE w/ ZE exh. cams/ pistns, KLG4 IM, 65mm TB, MSnS, Phenos, K&N RAI, UDP, Grnd wires, rear batt, filld MM, torq strt, TWM short shftr, Exedy, Lng tube hdrs 2.5" Side exhaust, H&R sprngs, Poly bushngs, strutbars, Alum. crss mmber&tiebar, 22mm swybar, solid links, Direzzas, leather int, Alpine 9805 stereo & alrm, keyless entry, 10 Boston Accoustics spkrs, Prjectrs, Blaster2, CF hood, FG hatch, Lexan
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fighttillyoudie0
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Re: K8 87 or 91 Octane?
fowljesse wrote:For MPG, research has proven that 89 octane is the best value. Higher octane generally nets more MPG, but cost per mile is best with mid grade. I get 35 MPG FWY in my stock GS with 1.5 oz. Acetone per tank, and 33 in my ZE.
Dang... I'm lucky if I get 21mpg on the freeway in my stock 1.8 K8...
And like 14 or so in the city...
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mitmaks
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Re: K8 87 or 91 Octane?
thats too low, you probably need a good tune upfighttillyoudie0 wrote:fowljesse wrote:For MPG, research has proven that 89 octane is the best value. Higher octane generally nets more MPG, but cost per mile is best with mid grade. I get 35 MPG FWY in my stock GS with 1.5 oz. Acetone per tank, and 33 in my ZE.
Dang... I'm lucky if I get 21mpg on the freeway in my stock 1.8 K8...
And like 14 or so in the city...
Last edited by mitmaks on June 5th, 2008, 5:37 pm, edited 1 time in total.
Magnum s/s lines, strut bars, carbon fiber bezel, indiglow gauge, Sony Xplod, inverted c/f hood, SRD lower tie bar '93 GS SE '95 Cobra SVT #2722 '68 Charger R/T 440
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http://www.cardomain.com/id/mitmaks
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fighttillyoudie0
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Re: K8 87 or 91 Octane?
mitmaks wrote:thats too low, you probably need a goot tune upfighttillyoudie0 wrote:fowljesse wrote:For MPG, research has proven that 89 octane is the best value. Higher octane generally nets more MPG, but cost per mile is best with mid grade. I get 35 MPG FWY in my stock GS with 1.5 oz. Acetone per tank, and 33 in my ZE.
Dang... I'm lucky if I get 21mpg on the freeway in my stock 1.8 K8...
And like 14 or so in the city...
Yeah I just did a tune up. Wires, Plugs,Oil change / Tranny oil change, Fuel filter/oil filter,Cap n rotor... It seems to be running rich and lacks power. I just put in new o2 sensors in.. but thats another story.
Re: K8 87 or 91 Octane?
I put 91 in just to be a smart a--. Most people are paying $70-100 dollars to fillup on 87. From empty I only pay about $45 for 91 so in your face SUV and truck owners.
Rule of thumb is the minimum octane it takes for your vehicle to run properly is what you use. There's no benifit going to a higher octane.
Rule of thumb is the minimum octane it takes for your vehicle to run properly is what you use. There's no benifit going to a higher octane.
2004 Subaru WRX Silver, stage 2, minty interior.
2002 Subaru WRX Blue, SOLD (best E test numbers I've ever seen)
94 MX-6. Sold
92 GS KLZE 5 Speed
96 GS 5 speed, KLZE, Sold
95 GS Minty Shape Sold
92 GS Sold
92 GS Parts Car scrapped.
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7477th member.
I know you believe that you understand what you think I said but I'm sure you realize that what you heard is not what I meant.
2002 Subaru WRX Blue, SOLD (best E test numbers I've ever seen)
94 MX-6. Sold
92 GS KLZE 5 Speed
96 GS 5 speed, KLZE, Sold
95 GS Minty Shape Sold
92 GS Sold
92 GS Parts Car scrapped.
Feedback viewtopic.php?f=37&t=66348" onclick="window.open(this.href);return false;
7477th member.
I know you believe that you understand what you think I said but I'm sure you realize that what you heard is not what I meant.
Re: K8 87 or 91 Octane?
well, let's start this ...
Portugal ... average monthly pay = 1150.00 USD
Portugal ...
fuel available = 95 octane = 2.33180 USD a liter ...
fuel available = 98 octane = 2.53468 USD a liter ...
since 1 liter = 0.264172052 US gallons , it costs a portuguese about
fuel available = 95 octane = 8.74 USD a gallon ...
fuel available = 98 octane = 9.49 USD a gallon ...
my K8 drinks about 10 liters to make 100km ... so it costs me about ... 23$us to travel 100kms ( about 62 miles )
I used to use 98 gas in my car, but u can see that i couldnt afford that way.
I decided to use 95 , and i had a wonderfull surprise. The car runs better on 95 , it pulls beter and i can travel more miles with it for the same gas.
I dont really understand why, but it does.
ps: can u get why i want to move way from Portugal ?
and i work for the biggest portuguese oil company ( Galp )
Portugal ... average monthly pay = 1150.00 USD
Portugal ...
fuel available = 95 octane = 2.33180 USD a liter ...
fuel available = 98 octane = 2.53468 USD a liter ...
since 1 liter = 0.264172052 US gallons , it costs a portuguese about
fuel available = 95 octane = 8.74 USD a gallon ...
fuel available = 98 octane = 9.49 USD a gallon ...
my K8 drinks about 10 liters to make 100km ... so it costs me about ... 23$us to travel 100kms ( about 62 miles )
I used to use 98 gas in my car, but u can see that i couldnt afford that way.
I decided to use 95 , and i had a wonderfull surprise. The car runs better on 95 , it pulls beter and i can travel more miles with it for the same gas.
I dont really understand why, but it does.
ps: can u get why i want to move way from Portugal ?
and i work for the biggest portuguese oil company ( Galp )
K8 :: 136.8 bhp---160 nm---108.0 whp---118lbs/torque
ET: 15.567 @ 136 kmh (84 mph)
"Racing a Honda is like being in the special Olympics, you may win, but in the end your still retarded."
ET: 15.567 @ 136 kmh (84 mph)
"Racing a Honda is like being in the special Olympics, you may win, but in the end your still retarded."
Re: K8 87 or 91 Octane?
my MPG is 23.6 with 95 octane gas
K8 :: 136.8 bhp---160 nm---108.0 whp---118lbs/torque
ET: 15.567 @ 136 kmh (84 mph)
"Racing a Honda is like being in the special Olympics, you may win, but in the end your still retarded."
ET: 15.567 @ 136 kmh (84 mph)
"Racing a Honda is like being in the special Olympics, you may win, but in the end your still retarded."
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hgallegos915
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Re: K8 87 or 91 Octane?
30 mpg with 91 octane on a klze at 4000 feet
-hec
MX-3 w/ curved neck millenia klde, boosted @ 5 psi. /bov and wastegate are good!/ nitto drag radial/ gutted interior/ millenia red top injectors, vortech fmu/aem wideband/ all bolts ons/ Car put together 100% by me. Mechanic? who needs a mechanic? ew.. real men work on their own cars!
MX-3 w/ curved neck millenia klde, boosted @ 5 psi. /bov and wastegate are good!/ nitto drag radial/ gutted interior/ millenia red top injectors, vortech fmu/aem wideband/ all bolts ons/ Car put together 100% by me. Mechanic? who needs a mechanic? ew.. real men work on their own cars!
Re: K8 87 or 91 Octane?
with gas prices being $1.25 a litre, i average 100km's for every 10 dollars spent..to me that is decent fuel consumption 
Re: K8 87 or 91 Octane?
I average 24MPG in the city and 30MPG on the highway on 87 octane. I just filled up on 91 and the car was really wanting to stall out and making little backfires all the time, I had to even retard my timing so it would stop predetonating and will likely have to change it back when I fill up on 87 again. So I would just recommend that you stick with what has been working for you and if you want to try something new don't get a full tank of it.