Is there a noticeable difference between 93 & 87 octane?
#1
Is there a noticeable difference between 93 & 87 octane?
Just picked up a GT & was wondering why the manual calls for 87? All the V8's I have owned all required 91 or higher. WIll it hurt anything if I deviate from the owners manual & run 93? Is there any noticeable power difference between the two? Not too concerned about the MPG's but is that affected as well? Thanks.
#2
RE: Is there a noticeable difference between 93 & 87 octane?
It would be a total waste of money running higher then 87. Unless you tune for it and go higher then you will see a performance improvement.
#3
RE: Is there a noticeable difference between 93 & 87 octane?
Yep. Unless you run an aftermarket tune, the stock programming although the PCM will adjust won't have a noticable difference. Run a programmer with a 93 tune and the difference from stock will be amazing.
#5
RE: Is there a noticeable difference between 93 & 87 octane?
A lot of people can't use 87 though as the car will ping. Mine does so I have to run the next step up in octane. This happens even with my tunes. But I noticed the pinging only happens when the engine is cold, once it's warm I don't think it does it any more. I would love to find out why some of these cars do this.
#7
RE: Is there a noticeable difference between 93 & 87 octane?
Only run what the manufacturer recommends, in this case 87. Octane's not quality but rather the volitility-rate at which it burns. But as the others have said, get a tune then run 93 w/more power!!!
#8
RE: Is there a noticeable difference between 93 & 87 octane?
the only car that would run more hp with higher octane is the new bullit mustang, because it's tuned to detect the higher octane and change the timing.
#9
RE: Is there a noticeable difference between 93 & 87 octane?
also guys we should mention running a higher octane without a tune will cause more carbon buildup quicker so then you can have some fun with the TSB on removing the plugs!!!
#10
RE: Is there a noticeable difference between 93 & 87 octane?
I put 87 all the time, i would recommend a good gas station because ive heard plenty of storys of stations using cheap 87. Gotta use the big guys who are profiting a couple billion a year