Re: Octane for 5.7 Hemi
[Re: Dcuda69]
#1440688
05/22/13 11:37 PM
05/22/13 11:37 PM
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Joined: Oct 2012
Posts: 1,106
Northeast
VincentVega
super stock
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super stock
Joined: Oct 2012
Posts: 1,106
Northeast
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You should run what it tells you to in the owner's manual.
Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know
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Re: Octane for 5.7 Hemi
[Re: Dcuda69]
#1440689
05/22/13 11:41 PM
05/22/13 11:41 PM
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Joined: May 2004
Posts: 5,123
Warrenton, VA
RoadRunnerJD
OP
master
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OP
master
Joined: May 2004
Posts: 5,123
Warrenton, VA
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Quote:
Usually no. What year? What application (Ram,300,etc?)
It's a 2013 Charger R/T Daytona
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Re: Octane for 5.7 Hemi *DELETED*
[Re: RoadRunnerJD]
#1440695
05/23/13 02:35 AM
05/23/13 02:35 AM
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Joined: Jan 2007
Posts: 7,664
IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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Quote:
The question was is their any good reason to run high test if it just calls for regular? Would you get any better performance? Would it be better or worse for the plugs and injectors? Just wondering if it would make any significant difference?
I've always run recommended 89 for normal driving and high test when towing. Why? Sustained heavy load (pulling a long hill with heavy trailer) builds heat and can cause detonation. The knock sensor may prevent engine damage by pulling timing... but cuts power when its needed most. Reduced timing also hurts mileage. That's why I run the high test when towing.
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