91 Octane
#1
Posted 29 June 2010 - 08:04 AM
#2
Posted 01 July 2010 - 06:48 AM
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#3
Posted 14 July 2010 - 06:58 AM
Just got a new Challenger with he 255 HP engine. The owners manual states to use 91 octane. Every station in the area sells 87, 89 and 93, no 91. Are other folks using 93 or mixing 89 and 93 for 91. I'm guessing a little higher on the octane won't hurt anything, but since this engine is already pushing a lot of HP, did not want to run it any hotter than necessary. Look forward to your thoughts.
Check your owner's manual. I have an '08, but mine says that 91 is recommended, but 87 is allowed. If that's the same for yours, try straight 89. If that doesn't work for you, you could go the 50/50 89/93 mix. Straight 93 is OK, but more expensive, so the 50/50 will be a little cheaper (if the 89 doesn't work for you).
#4
Posted 15 July 2010 - 04:22 PM
Just got a new Challenger with he 255 HP engine. The owners manual states to use 91 octane. Every station in the area sells 87, 89 and 93, no 91. Are other folks using 93 or mixing 89 and 93 for 91. I'm guessing a little higher on the octane won't hurt anything, but since this engine is already pushing a lot of HP, did not want to run it any hotter than necessary. Look forward to your thoughts.
93 octane will work just fine and wont hurt anything... Just make sure you're using ethanol free gas...
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