View Poll Results: What Octane do you use most often in your 5.0?
87
9
16.67%
89
3
5.56%
91+
42
77.78%
Voters: 54. You may not vote on this poll
Does anyone actually run with 87 Octane on their 5.0?
V6 Member
Joined: April 6, 2010
Posts: 92
Likes: 0
I have been running 87 for low-speed around town driving and filling up on 91 for road trips and/or when I know I'll get the chance to do more spirited driving. I get no pinging or knock with the 87, however.
My MPG (with a 3.73 rear end and 5-speed manual) averages a lousy 12 in the city but a decent 24-26 highway. I have never owned a vehicle before with such a large spread between city and hwy mileage. My '06 GT with an ATX got around 16 city.
I am going to try 91 in town also to see if it boosts my city MPG, although I tend to doubt it will.
BTW, there is a gas station near me that sells 100 octane (!) gas, however it runs $6.39/gallon last I checked.
My MPG (with a 3.73 rear end and 5-speed manual) averages a lousy 12 in the city but a decent 24-26 highway. I have never owned a vehicle before with such a large spread between city and hwy mileage. My '06 GT with an ATX got around 16 city.
I am going to try 91 in town also to see if it boosts my city MPG, although I tend to doubt it will.
BTW, there is a gas station near me that sells 100 octane (!) gas, however it runs $6.39/gallon last I checked.
V6 Member
Joined: September 13, 2010
Posts: 78
Likes: 0
HP with 87 is 402 HP on 91+ is 412... So with more octane you get a bump in the power...
I would think you run the 87 until you save up enough to get a new intake and tune! I run 87 in mine with no problems what so ever!
Cobra Member
Joined: March 14, 2007
Posts: 1,131
Likes: 6
From: South Dakota
I am going to try Regular the next time I fill. I refuse to use the mid-grade with 10% ethanol. Both Regular and Premium are alcohol free out here and there is about .33 cents difference in cost. I am just curious to see what happens to the mpg, as the majority of my driving is interstate or two lanes. I admit I enter the highway on ramp at an "acceptable merge speed", and cruise at 75.
Bullitt Member
Joined: July 23, 2010
Posts: 414
Likes: 0
From: SW-Florida
Here in FL, the difference between Regular (87) and Premium (93) is about $ 0.20 and $ 0.25. So figuring that I usually fill up around 10-12 gallons, it will run me about $ 2 to $ 3 dollars more per tank by filling up with the Premium... I'm not driving hundreds of miles per day, and even though it is my daily driver, I love to have some fun as well. So well worth it IMO!
I just had the Steeda CAI installed on Friday... and even Gus from Steeda said that the car would run on 89 (here in FL 89 is considered mid-grade)!
I thought this car was a rocket before, but after the CAI & Tune... I usually leave the seat of my pants behind, before it can catch up later, when I stop!
See ya!
I just had the Steeda CAI installed on Friday... and even Gus from Steeda said that the car would run on 89 (here in FL 89 is considered mid-grade)!
I thought this car was a rocket before, but after the CAI & Tune... I usually leave the seat of my pants behind, before it can catch up later, when I stop!
See ya!
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