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Old 08-30-2014, 03:44 PM   #1
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Anyone "grenade" a 2.0 GDI yet due to 87 octane gasoline?

Has anyone exclusively run 87 octane gasoline in their 2.0 GDI? If so, have you "blown" the engine due to 87 octane gasoline?


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Old 08-30-2014, 03:45 PM   #2
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huh?
87 octane is regular fuel...and it's designed for it...

Makes no sense
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Old 08-30-2014, 04:09 PM   #3
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Quote:
Originally Posted by ELCouz View Post
huh?
87 octane is regular fuel...and it's designed for it...

Makes no sense
I'm not so sure about that. As I'm learning a boat load about engines in another thread, the 2.0 GDI has a compression ratio of 12.0 : 1 (or simply, 12.0).

A value of 12.0 puts the 2.0 GDI in the super-super car category and makes it, by the compression ratio alone, an ultra performance engine (or motor as some call it) by design.

To get a 12.0 compression ratio engine to even run on 87 octane gasoline takes enormous compromises and electronics against the performance design.

So to say the 2.0 GDI was designed to run on 87 octane is a misnomer. It was designed as an ultra performance naturally aspirated 2.0 four cylinder engine that Ford "compromised" to be economical.

It's that "compromising" to be economical that worries me that running 87 octane gasoline, even though Ford says it's "ok", is going to damage the engine. I've learned there's only so much you can do to get a 12.0 compression ratio engine to even run on anything less than 91 octane gasoline. And while Ford appears to have done it, the question is, how well did they do it, because it's nearly an impossible task from what I'm learning.

Am I slowly degrading my engine by running 87 octane gasoline as the fuel source? Should I expect it to grenade the engine within say 60k miles?
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Old 08-30-2014, 04:14 PM   #4
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Ford claims improved performance from premium fuels, but it is not required.

Claiming that 87 octane fuel will somehow ruin the engine is asinine. This is a MASS PRODUCED ECONOMY CAR.

Use your head.
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Old 08-30-2014, 04:16 PM   #5
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You're reading about port fuel injection.
GDI injects the fuel directly onto the piston cooling temperature in the cylinders preventing preignition.
12:1 on port injection with 87 octane would blow a hole in the piston. With GDI it's no problem. It's a great technology that enables more power out of the same fuel with no compromises.
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Old 08-30-2014, 04:18 PM   #6
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Quote:
Originally Posted by mac.mogul View Post
Ford claims improved performance from premium fuels, but it is not required.

Claiming that 87 octane fuel will somehow ruin the engine is asinine. This is a MASS PRODUCED ECONOMY CAR.

Use your head.
I'm trying. I understand the mass produced (and sold) part of it -- just like a decade plus of Focuses before the Mk3, but what on Earth was Ford thinking putting a 12.0 compression ratio in an economy car? Sorry, but 12.0 isn't an "economy" designed engine as I'm learning.
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Old 08-30-2014, 04:22 PM   #7
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Quote:
Originally Posted by TooOld View Post
I'm trying. I understand the mass produced (and sold) part of it -- just like a decade plus of Focuses before the Mk3, but what on Earth was Ford thinking putting a 12.0 compression ratio in an economy car? Sorry, but 12.0 isn't an "economy" designed engine as I'm learning.
All modern cars with GDI have 12:1 or greater compression (unless turbocharged)
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Old 08-30-2014, 04:23 PM   #8
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Quote:
Originally Posted by TooOld View Post
I'm not so sure about that. As I'm learning a boat load about engines in another thread, the 2.0 GDI has a compression ratio of 12.0 : 1 (or simply, 12.0).

A value of 12.0 puts the 2.0 GDI in the super-super car category and makes it, by the compression ratio alone, an ultra performance engine (or motor as some call it) by design.

To get a 12.0 compression ratio engine to even run on 87 octane gasoline takes enormous compromises and electronics against the performance design.

So to say the 2.0 GDI was designed to run on 87 octane is a misnomer. It was designed as an ultra performance naturally aspirated 2.0 four cylinder engine that Ford "compromised" to be economical.

It's that "compromising" to be economical that worries me that running 87 octane gasoline, even though Ford says it's "ok", is going to damage the engine. I've learned there's only so much you can do to get a 12.0 compression ratio engine to even run on anything less than 91 octane gasoline. And while Ford appears to have done it, the question is, how well did they do it, because it's nearly an impossible task from what I'm learning.

Am I slowly degrading my engine by running 87 octane gasoline as the fuel source? Should I expect it to grenade the engine within say 60k miles?
Now you're just being childish.

for the rest of you, his claims of supercar territory and the like are sarcasm, attributing that claim to me when i never actually made it in the first place.
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Old 08-30-2014, 04:23 PM   #9
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tooOld, your thinking in terms of older muscle cars...with those crs you would get detonation if you were running these compression ratios on low grade fuel. The designs of newer engines offset this. as stated direct inject engines are different as are materials of the heads. Even in the older engines switching to aluminum heads would allow you to increase compression and run lower octane than with cast heads. If they say it is safe for 87 octane....take it to the bank....not trying to insult you, but im sure the engineers know more about this than you, or most of us for that matter.
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Old 08-30-2014, 04:26 PM   #10
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Quote:
Originally Posted by G.O.Joe View Post
Now you're just being childish.

for the rest of you, his claims of supercar territory and the like are sarcasm, attributing that claim to me when i never actually made it in the first place.
Wait...is this carry over from another thread? Have we been trolled?
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