87 Octane

[mike62]

When I picked up my GT with PP my dealer put 87 in the car. I asked her why and I was told that the engine only required 87 not 93. I checked the manual and it also said 87. What do people think?


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[BBB]

your engine is ruined man

 

[mike62]

Why would manufacturer state it in the manual? I just got her last week. Nothing from the car has indicated that something isn't right with the engine.


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[Khyber]

bbb is joking

87 is all that is required as the manual states. many run 91 or 93 for their own reasons. I personally only run 87.

 

[Shibby]

The engine will accept it, but you'll have a slight dip in horsepower.

The manual also says "To provide improved performance, we recommend premium fuel"

 

[mike62]

Ok, thanks for the assistance. I only used less than half a tank so I will fill up. Any additives from auto store that I can use to clean out the bad gas other than using 93?


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[Khyber]

87 is not bad gas...lol

if you choose to use 93...just put 93 in it.

no sense in adding some octane boost additive...

 

[Shibby]

Use as much of the 87 as you can before filling up if you want to avoid mixing. It's not "bad" gas.

 

[fionic]

just run til empty and fill her up with 93 to get full power/best mpg. The engine runs fine on 87, it's just not tuned to be best with 87. run 93.

 

[mike62]

Thanks I'll wait till than.


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[Bassfishman]

In daily driving I can tell no difference between 87 and 93 other than cost!

 

[Desmondo]

My current is a 2007 V6.

I'll put in 87 for regular driving, but if I'm taking a long highway trip and I'll be going... let's say "fast" ;) during some stretches.. I'll go with 93.

With 87 I'll get a noticeable knock in 4th (auto trans) in higher RPMs.

 

[phrenetiK]

1% horsepower loss with 87. i ran 93 till 3000 miles in when I realized I only needed 87. saw nothing go away besides 1-2 mpg, which is still more cost efficient.

but now, my lund tune should arrive today and it will require 93....i figure ill bounce between the lund tune and stock tune so I can continue to run 87 octane for daily driving

 

[dreicher]

Higher octane gas only becomes an issue when approaching wide open throttle. At partial throttle the engine does not approach the maximum compression ratio and pre-ignition is not likely.

 

[Beetlespin]

When I picked up my GT with PP my dealer put 87 in the car. I asked her why and I was told that the engine only required 87 not 93. I checked the manual and it also said 87. What do people think?


:frusty::headbonk::tsk::lol::doh:

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