Do you guys really notice a difference when using 100 octane vs 93 octane? I use 100 octane once in a while since there's a Sunoco station 15 min away that has it. I like to think there's a difference the way the car runs with the 100, but I think it may be in my head. Any factual information or comparisons???

 

how much is the 100 octane now days......??

 

$7.49 per gallon, which is pretty reasonable now the 93 octane is over $3.

 

almost every single dyno you have seen posted here on MBworld that came from a 65/600 bi-turbo motor was running 100oct+ Also dont think for a second there arent variances in tuning and you need to know your car is running at its optimum, if its not producing the power it should you can easily send the ECU back to Renntech to get it reflashed for free. Do not rest on the data that you have been given by renntech or by what you have read here, dynoing your car is VERY important. Let me know if you nedd help finding a reputable dyno operator in your area.

 

if you are from ny, are u talking abt the one by the gw bridge?

 

In a turbo car, it allows you to crank up the boost without knock. In stock form you won't see any gains, as your ECU isn't programmed to take advantage of it. If you crank the boost, higher octane helps.

 

I once filled my tank up with 100...WASTE OF MONEY. Felt like a 10-15 hp gain but nothing special. As 'Cylinder Head' mentioned, theres no advantage in stock form.

Now if you're running more boost, it might be a different story?? We'll find out this weekend.....im only filling up 1/2 this time

 

I would think higher boost would require high octane for optimal output? Some of those heavily modified imports (Supras, evos etc.) put out an extra 50-80 whp just by going from pump to race.

I'm sure you know what I'm talking about.

 

E55Jay,
I guess I'll have to Dyno the car to see. Do you know of a good place on LI, NY.

Advans,
The Sunoco station I went to is in Bellmore, NY.

 

list of places per dynojet.com

NEW YORK

D R T Inc.
50-33 73rd Place
Woodside, 11377
Tel. 718-397-8586

Dyno Sport Performance
1011 Lakeville Road
New Hyde Park 11040
Tel. 516-775-1840

Lizzard Racing
20 Eads St.
West Babylon 11714
Tel. 631-420-1476

Kennedy's Dynotune
Model 224x
3165 Niagara Falls Blvd.
North Tonawanda 14120
Tel. 716-693-5354
Website: www.kennedysdynotune.com/

Mustang Magic
160 Brook Ave.
Deer Park 11729
Tel. 516-254-3430
Website: www.mustangmagicinc.com

New Era Performance
Model 224x
95 Mt Read Blvd Door #8
Rochester 14611
Tel. 888-865-1832
Website:www.neweraperformanceparts.com/
Email:sales@neweraperformanceparts.com

North Shore Auto Salon
325 Great Neck Road
Great Neck, 11021
Tel. 516-466-3368

P & J Speed Shop
195 Main St.
North Tonawanda 14120
Tel. 716-694-6363
Website: www.pandjspeedshop.com

Pampena Motorsports
Model 424x 4WD Dyno
1743 Julia Goldbach Ave.
Ronkonkoma 11779
Tel: 631-738-0303
Website: www.pampenamotorsports.com

Power Surge Performance
15 Shagwong Dr.
Beach 11789
Tel: 631-821-3622

Ralph & John Auto
1323 65th St.
Brooklyn 11219
Tel: 718-837-3093
Website: www.RalphandJohnsAuto.com/
Email: rjautoshop@aol.com

Romar Enterprises, Inc.
P.O. Box 707
630 Rte 52
Walden 12586
Tel. 845-778-2737
Website: www.romarracing.com/

Speedworld Auto Accessories
Model 224x
598 Sunrise Highway
Baldwin 11510
Tel: 516-771-2525
Website: www.Speedworld.com
Email:jimmy454@optonline.net

Spina's Engine Shop
3270 Ridge Rd.
Ransomville 14131
Tel. 716-791-4640

T & R Racing
Model 224x Dyno
94-36 Merrick Blvd.
Queens 11432
Tel: 718-725-0179
Website: www.rx7s.com

The Speed Shop
Model 224
5705 East Taft Rd.
N. Syracuse 13212
Tel: 315-452-3278

Top Level Automotive
Model 224x
2316 Atlantic Ave.
Brooklyn 11233
Tel: 646-262-0482

Tri-State Autosport Inc.
Model 424x
94-158 Merrick Blvd.
Jamaica 11432
Tel: 718-291-3717

The Vette Doctors Inc.
26 Elm Place
Amityville, 11701
Tel. 631-841-0779
Website: www.thevettedoctors.com/

 

wow! this place I pass by all the time! maybe I should drop by for a dyno!!

 

It really depends on HOW MUCH boost you're talking about. Most MB's won't break 18psi in either turbo or supercharged form, but the highest tuned examples could benefit from the higher octane. It burns hotter and faster and ignites at higher temps, which is synergistic with high boost. I could run my Sup at 35psi on C16 and make some INSANE power, but I'd be chattering my teeth with worry regardless of the fact that the motor is practically invincible.

 

dont go to drt, they dont give torque or fuel air mixture. but they do have good pricing.

 

Thank you for the list of Dyno places.

 

we sell VP race fuel where i work. when i had my old bmw 325, that car absolutely LOVED VP's MS100 which was 100 octane, but with MTBE. now that MTBE additive is illegal in NY, VP's MSE100 blend sucks. i've tried it in the e with absolutely no power gains felt. of course, it's a different ball game with higher cylinder pressures from fi.

 

Thanks for your input, however I don't understand what you're saying. Please don't be offended, but can you explain what your abbreviations mean as well??????

 

stock or non forced induction you will not notice anything because you dont get anything out of it.

 

a modern stock naturally aspirated car will see no benefits from using 100 octane gas. the only thing that's going to go faster is your bank account

 

The OP is wildly