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View Poll Results: what octane gas do you prefer
92 0r 93 Octane Super 117 17.16%
89 Mid grade Octane 240 35.19%
87 Regular 315 46.19%
I add my on octane boost 7 1.03%
other > 17 2.49%
Multiple Choice Poll. Voters: 682. You may not vote on this poll

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  #61  
Old 08-01-2011, 11:08 PM
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i use 87 octane for around town but higher rpms it starts pinging ... for highway use/long tips and race track fun i jack a full tank of 94 or sometimes even 110
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  #62  
Old 08-02-2011, 12:12 AM
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Best I can afford ~ lately that is 87 and the truck doesn't seem to care as long as I don't put too much foot in the throttle!
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  #63  
Old 08-02-2011, 02:30 AM
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Quote:
Originally Posted by White Lightening View Post
i use 87 octane for around town but higher rpms it starts pinging ... for highway use/long tips and race track fun i jack a full tank of 94 or sometimes even 110
i use to run 87 and sip it all day but anything high after 2500 - 3000 RPM or climbin a hill i start to ping...so my buddy (friends & racers since highschool) at the race shop lets me fuel up free of charge with 94 or a small fee for 110
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  #64  
Old 08-02-2011, 09:31 AM
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I've used 87 in every vehicle I've owned (Dodge Intrepid, 96 Ram, Chrysler Sebring, 10 Ram, 05 Suzuki Hayabusa) never had a problem out of any of them!
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  #65  
Old 08-03-2011, 12:52 AM
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I have had my truck for about 2 months now and have put nothing but 87 in it, but today I put 93 in there and i could tell a huge difference! Can't do that all the time or my wallet will start to feel it!
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  #66  
Old 08-09-2011, 05:00 AM
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Higher octane will actually net you less horsepower...however, if the computer can sense the octane and in turn, retunes the truck on the fly...you will notice a difference, but, the Hemis will only do that for 89...running 93 is just a waste of money for no gain.

A big misconception is that higher octane fuel makes more power...but, really, all the octane rating means is, the higher the number, the harder it is for it to ignite.

Basically, you want to run the lowest octane you can without engine knock "ping" (pre-ignition/detonation). Lower octane fuels have a lower flash point, therefore can preignite more easily. By running a higher octane, the fuel is actually igniting later in the engine stroke.

The reason high performance vehicles usually call for higher octane fuel is because they have a more aggressive timing curve which makes them more prone to pre-ignition. Also, boosted vehicles need it since the air charge is so much hotter than on an N/A engine, it can cause pre-ignition simply because of the heat...same with high compression n/a motors. Pressure goes up, temperature goes up, chances for knock go up.

So, run 87 if you have a 5.2/5.9L, and, if you have a hemi that recommends 89, you'll get the best performance with 89. Unless you have a 93 octane tune, our trucks don't need 93 octane. If it pings, step it up a grade, if it still pings, you have an issue that should be fixed. (either running lean, too much slop in the timing chain, or oil is being introduced into the combustion chamber).

Also...oil has a very low flash point making it ignite very easily...thats why if you have a bad plenum gasket in the magnum motors, they ping so badly.

Just some random facts I figured I'd enlighten this thread with so people don't go wasting money for no reason
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  #67  
Old 08-09-2011, 08:14 AM
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I've tried both 87 and 89 in my 2011. No noticeable performance difference so why pay for higher octane?
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  #68  
Old 08-13-2011, 04:46 PM
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i use 89 in my ol girl aswell
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  #69  
Old 08-17-2011, 05:50 PM
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89. i figure if it's preferred per the design, it's worth the extra $0.10 per gallon. audible knock be damned.
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  #70  
Old 09-03-2011, 10:20 PM
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I run my DiabloSport with the 93 octane program 24/7
so I run 93 with NO ethanol
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