How does your GT run on regular gas?

[5speed]

Just a question, if it runs on 87, will run better on 91/93, will it run better on 110? It can be had so should we be running that at the track, etc? Will the computer compensate for that without a tune on it?

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[5speed]

Anyone of of you more knowledgable gents know the answer? Sunoco 110? Will it adjust to that without a tune? Will a tune even have a setting?

 

[nustang]

87 cooler weather. 91 in the peak of summer. Esp in city, where intake air can be really hot, with a better chance of knock on accel.

if you do a bit of googling, you will find 87 has more explosive power ... 91 and up less chance of pre-ignition .. ie not as volatile, but needed for high compression engines. We are conditioned to relate more $ to better. Best grade is what your engine calls for in the manual.

 

[Joedag1]

My brother in law has a leased 2020 Mercedes CLA 35 with a AMG hand built motor, he is extremely cheap and thought he could get away with using 87 octane. He was very wrong! The motor destroyed itself in less than six months. He was lucky Mercedes replaced the motor under warranty.

 

[331GT]

My brother in law has a leased 2020 Mercedes CLA 35 with a AMG hand built motor, he is extremely cheap and thought he could get away with using 87 octane. He was very wrong! The motor destroyed itself in less than six months. He was lucky Mercedes replaced the motor under warranty.

turbo 2.0 liter with a bit over 300 hp... im willing to bet Mercedes probably specifically said do not use 87 octane, but that's just a guess. recipe for problems in that type of engine.

 

[Andy13186]

Never ran regular even once, my car had 42 miles on it and a low fuel level when I bought it they offered to fill the tank with 87 I denied that. Put in 93 then got tuned for e85 around 10k miles now I have 50k miles whippled 770 rwhp and run e50

 

[Linkster1666]

It doesn't!

 

[mc68386]

The peak power difference is irrelevant, where you really lose the most is in normal lazy driving part throttle racing. The ECU down low likes to throw a lot of ignition timing to make up for the fact the engine is on the smaller side for a V8. That's the most likely situation to find knock,

There, fixed that for you.

 

[ice445]

There, fixed that for you.

Lol, if you say so. Given you live in Arizona, you should be familiar with timing pull in the summer. But maybe not, the Gen 2 cars are lower compression and make less power, so they're probably less affected.

 

[geezer stang]

i'm on a mixture of 87-89-91,for the type driving i do it works out for me,haven't noticed any pinging or loss of power.

 

[LSchicago]

It doesn't run regular. It can't anymore either.

 

[Johnnybee]

Not a GT, but have run 91 since new, but with the price of it now am thinking about dropping to 87 as well. It just annoys me that there is usually a 30 cent leap between the two grades but only another nickel to 93. The spread has just gotten bigger and bigger over the years. 91 is now in the vicinity of CDN$2.25/litre or roughly $6.60/gallon for my US friends.

 

[Linkster1666]

Sure, the manual says IT WAS DESIGNED FOR 87 OCTANE, it was. The manual doesn't say it runs BETTER on 87 than 91/93, it just says you can USE it, and it's fine, which it is.

Will I use 87 Octane in mine, F*CK NO!! Not because 87 doesn't work, but because it doesn't work as well as 91/93.

How well does it run after 100k mile on 87 only? On 91 only? We shall see.

 

[K4fxd]

if you do a bit of googling, you will find 87 has more explosive power

When you say explosive power, what do you mean? Easier to spontaneously combust? or more power potential?

 

[Dfeeds]

When you say explosive power, what do you mean? Easier to spontaneously combust? or more power potential?

So power
Much explosion
Piston hole!

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