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View Poll Results: Be honest, What fuel do you use in your SVX | |||
always with Octane 89 or less | 0 | 0% | |
89, once in a while 91 or better | 3 | 5.45% | |
always with Octane 91 or better | 27 | 49.09% | |
91, once in a while 92.5 or better | 25 | 45.45% | |
Voters: 55. You may not vote on this poll |
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#16
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Quote:
http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm
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Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI |
#17
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Troy 1992 SVX LSL "Serenity" 250,000 miles! I don't care, I'm still free, You can't take the sky from me... |
#18
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Here's an interesting FAQ from the Federal Trade Commission:
http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm -------------------------------------------------------------------------------- Thanks for the link Ardub, that was what I was talking about. If we had 91 octaane available here that's what I'd use all the time but since we don't I mix my own. Sometimes I even fill about 2 thirds of a tank with 93, stop the pump, put my credit card back in and finish filling with 89. It's a pain so I usually fill it with 93 and when it gets to half full fill again with 89. |
#19
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Here are a few facts from an Ex- Petroleum Bypass Engineer, for those of you who have also performed this job, you know what I mean.
Octane levels are regulated and are always calculated the same way, at the same tempurature. So, the Octain level will always be on the Yellow sticker. If you say you can't find the yellow sticker on the pump, only a white one? Go back to kindergarden and hang some drawings in the window. Higher octane fuels are generally required for engines with higher (Normally asperate) compression ratio engines. The basic principle is that detonation will occur at a certain preasure, the higher the octain, the higher the preasure before it will detonate(or just spontaniously combust) like all those drummers from Spinal Tap. Higher octane fuels have other charactoristics, they also tend to burn a little hotter, for all intense purposes. And they burn more controlled(slower). By burning more controlled they tend to produce more energy more efficiently. But, they do not always produce more overall energy than a lower octane fuel. This starting to remind me of "who's on first" Lets make this easier, SUMMARY: changing the octain level of fuel you use in your car, changes the torque and horsepower performance curves. Lower octain will generally give you slightly better bottom end, and higher octane will give you slightly better top end. Each Manufacturer has tuned their engines and transmissions to match the designed performance curves using their recommended octane levels. Change the octane = change in performance. The SVX has a matched Transmission to motor ECU/TCU control system. So its best to use the recommended 91 octane for best performance. If you have a manual transmission, then learn to use the octane level to your advantage. If you can't control the shift points in your transmission(automatics), then change where the engine hits its highest Torque by adjusting the octane. Go too low, and you get deiselling(detonation). Go too high, and the car shifts before the torque kicks in. I hope this makes sense. I will admit I have simplified some of this info, but in general, it is correct. If by chance any-one see's a serious error I have commited, well....I'm sure you'll share it.
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms Last edited by CDG; 01-15-2003 at 02:36 PM. |
#20
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I try not to use gas that has the alcohol added to it. I don't know if it really makes a difference, but I have avoided it in the past. Any thoughts on that issue.
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. Earl .... ... .... ><SVX(*> Subaru Ambassador [COLOR=”silver”]1992 Tri Color L[/COLOR] ~45K (06/91) #2430 1992 Dark Teal LS-L ~184K (05/91) #0739 1992 Claret LS-L ~196K (05/91) #0831 1992 Pearl LS-L ~103K (06/91) #1680 1992 Pearl LS-L ~151K (06/91) #2229 1992 Dark Teal LS ~150K (07/91) #3098 (parts car) 1992 White LS-L ~139K (08/92) #6913 1993 25th AE ~98K (02/93) #164 1993 25th AE ~58K (02/93) #176 1993 25th AE ~107K (02/93) #215 1993 25th AE ~162K (02/93) #223 1994 Laguna Blue Pearl LSi ~124K (1/94) #2408 1994 Laguna Blue Pearl LSi ~144K (10/93) #1484 1994 Laguna Blue Pearl LSi ~68K (10/93) #1525 1994 Barcelona Red LSi ~46K (02/94) #2624 1994 Pearl LSi ~41K (12/93) #1961 1995 Bordeaux Pearl LSi ~70K (02/95) #855 1996 Polo Green LSi ~95K (03/96) #872 1997 Bordeaux Pearl LSi ~55K (08/96) #097 2003 Brilliant Red LS1 Convertible ~29K (04/03) #8951 1999 Magnetic Red LS1 Coupe ~33K (04/99) #6420 My Email | Old Locker | New Locker | Picture of 15 of the 19 |
#21
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Alcohol has only one adverse effect, it tends to help strip oil from surfaces. But under the heat and friction of a combustion chamber, and advances computer controls, blah blah blah, it really has no serious side effect anymore. It shoul;d not be a concern.
However, after having said that. Always remember, the best way to kill your cat is to change its diet. If you have been avoiding alcohol fuels, continue to do so. I have not seen any posts from anyone who has talked about excessive wear in the cylinders or any part of the air/fuel chambers. or for that matter any worn out SVX engines. Does that answer your question?
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
#22
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Fuel
In Austria we have got 91, 95 and 98 octane.
91 octance are used with cars less than 100 hp. For my baby I take 95 octane. 98 octane is something special, for cars without KAT I think. mfg hrc
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Ænima |
#23
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Cheers, Pete. |
#24
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In my area we have 92 & 93 octane. Sunocco also has 94, but I never use it. I use Shell 92 or Amoco /93.
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Larry III & The Beautiful Naviguesser '19 Tungsten Pearl Outback 3.6R Ltd...."AISHA" '08 Harvest Gold Outback 3.0L. L. L. Bean...."AIJOU" '07 Gray Diamond Pearl Outback XT Ltd..."AH SO" '05 White Pearl & Silver BAJA Turbo..."AH HA" '97 Bordeaux Pearl SVX LSi..."SUBYDOO" '94 White Pearl SVX LSi..."PEARLY" '92 White Pearl SVX LSL w/touring pkg..."SVXY" '92 Teal SVX LSL w/touring pkg..."ALCYONE" '96 Polo Green LSi ... "MIDORI" '00 Black Dodge VIPER RT-10... "VINNIE" Engineers do it with precision. English teachers are novel lovers. Home: larrysingeriii@comcast.net SVX FEVER, CATCH IT AT A MEET NEAR YOU !! |
#25
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Quote:
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Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI |
#26
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It's how I get all those clowns out of my Fiat so quickly.
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Dick ************** 1999 Legacy GT 30th Anniversary Edition 2001 Outback Sport |
#27
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I think in minnesota all of our gas has ethanol added to it, and I don't know if it has negative side effects. I always use 93 octane which I can only get at "Holiday" but I'll settle for 92 if I need to get gas somewhere else. -Aaron
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-Aaron SVX: '92 Dark Teal 101k '97 Legacy GT Wagon: dead '99 Civic Si: daily driver... stolen and stripped with all my tools! '92 Yamaha FZR 600: garage 2011 Jetta: Daily disappointment |
#28
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Again way oversimplified but that way I can understand it. |
#29
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Perhaps I can rephrase it this way.
Higher Octane fuel is a more controlled burn, and you are correct it burns longer, therefore slower, therefore providing a longer power stroke, therefore able to have a more advanced spark. Its tricky, as fuel injection controls the burn time. the essence is this: The ECU is tuned to burn 91 Octane, more or less can be adjusted for, but the extremes can cause problems. Many other factors effect the burn, thats why some can use 89 Octain without knocking, where some have to run higher to avoid knocking. My appologies for my mistake. You can spank me when you see me...
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
#30
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i use moms special recipte go go juice gas..
all i know is turbo cars, 20 psi or more 107-110 octane senoco fuels => but my svx baby always gets 93 here in florida. bye the way whene is the gas prices going to get lower !!!!
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2008 evo x with sss package 430 hp 380 torque stock turbo with basic bolt ons 12.56 @ 109 fully weighted 3,500 lbs |
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