highland Posted May 20, 2006 Share Posted May 20, 2006 I just got a '05 Legacy, and I know it's supposed to take 91 Octane. But most of the Gas Stations around me only seem to have 89 or 93... I'm not so hot on paying the extra for 93, is it cool to run the car with 89? Link to comment Share on other sites More sharing options...
bobo69 Posted May 20, 2006 Share Posted May 20, 2006 do you have a gt if so you must run the 93 Link to comment Share on other sites More sharing options...
highland Posted May 20, 2006 Author Share Posted May 20, 2006 Yeah it is a GT. What is the problem with using 89, is it bad for the engine? Link to comment Share on other sites More sharing options...
gt_ltd Posted May 20, 2006 Share Posted May 20, 2006 is it bad for the engine? yes. if anything goes wrong, Subaru will NOT cover anything under warranty. This Space For Rent Link to comment Share on other sites More sharing options...
GBY Posted May 20, 2006 Share Posted May 20, 2006 93 Link to comment Share on other sites More sharing options...
Spec B 127 Posted May 20, 2006 Share Posted May 20, 2006 Use the 93, or use the 89 and spend all the money you save on gas to fix things... Link to comment Share on other sites More sharing options...
SLegacy99 Posted May 21, 2006 Share Posted May 21, 2006 Use the 93, or use the 89 and spend all the money you save on gas to fix things... He's right. However my '96 LGT required 91 and I always used 89 and never had a problem. But then it was not a turbo. ...glad Subaru solved that problem quickly so I can now use 87 in the '99. Got some 89 for the hell of today. Felt nice. Link to comment Share on other sites More sharing options...
mccorry Posted May 21, 2006 Share Posted May 21, 2006 You can run the 89... if you stay out of the boost. Link to comment Share on other sites More sharing options...
mustangendsley Posted May 21, 2006 Share Posted May 21, 2006 you bet 89 is bad!!! hard on the engine Link to comment Share on other sites More sharing options...
runnerodb83 Posted May 21, 2006 Share Posted May 21, 2006 well if you use 89 when 91 is required, you will get "pinging." Bastically the fuel combusts before the spark, and while it will take a long time to actually WRECK the motor, its not good for it and your basic performance will suffer. Yes, you can drive the car on 89, but please, dont. It's not a diesel, and it needs a spark to generate combustion, so buy at least 91. Mixing will not "average" out to 91 fyi. Link to comment Share on other sites More sharing options...
Postman Posted May 21, 2006 Share Posted May 21, 2006 Been a while but if I recall r/m method will avg out 93+89/2/=91 Good luck Link to comment Share on other sites More sharing options...
DAC17 Posted May 21, 2006 Share Posted May 21, 2006 Depends how you drive. If you rarely get into boost, you'll probably be OK with 89. If you drive like you thought you would when you bought the car (why did you buy the GT anyway?), you'll need 93. Frankly, it's probably about $2.00 difference per fill-up. You'll lose that much money easily if there's a problem with the car, and it's caused by 89, 'cuz Subaru (appropriately) probably won't pay for the damage. Link to comment Share on other sites More sharing options...
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