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I6 differences?

4158 Views 46 Replies 14 Participants Last post by  NyquistRate
So there was an article posted by TFL saying the 2 - I6 variants are mechanically identical and the hp/tq rating difference is only due to premium vs regular fuel.

Any way to confirm this as it seems hard to believe. I would assume there are pressure differences between the turbos or something in the computer programming.

I know someone had access to the parts diagrams. Are the turbo units the same part numbers between S and non-S variants?
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I disagree that the 280 HP engine will make more power on 93. The engine electronics would have to allow changes to cam timing, etc. They rated it for regular unleaded and I’d bet they did it on purpose to differentiate it from the S engine.
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There are other differences between the base model and the S. The S has the following over the base model (both in Premium Plus trim):
  • adaptive headlights
  • body color wheel moldings
  • wheels are upgraded on the S to the pictured black/shiny finish
  • second row console
  • ventilated second row seats
  • Premium Nappa leather
  • a larger fuel tank
4
Turbo premium plus:
L_KH4

White Nappa Leather
L_KH3

Black Nappa Leather

Turbo S Premium Plus:
L_KH5

(Quilted) Tan Nappa Leather
L_KH6

(Premium) White Nappa Leather

Different. Like I said.

My point was never to say the S model is a good value. Each will decide that for him or her self.
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DAM is a Subaru acronym for a feature of their turbo engine. My comments were about a Mazda.
Octane defined:
Octane ratings are measures of fuel stability. These ratings are based on the pressure at which a fuel will spontaneously combust (auto-ignite) in a testing engine.

It is a measure of a fuel's ability to resist detonation.

You wrote: "The only real difference between premium and regular fuel is the temperature which it ignites."
That is not correct. 87 octane fuel and 93 octane contain exactly the same amount of energy.
My last post in this thread:

I stand by my original statement. I highly doubt that Mazda's engine development team overlooked the potential of the base 280 HP engine and it can actually make more than that. They used the term "UP TO 340 HP" when referring to the S model but forgot the UP TO part on the base model?
Could it make more on 93? Probably, but only if the engine electronics (the "tune") allows it.
They made them different purposely to differentiate the models.
My last post in this thread:

I stand by my original statement. I highly doubt that Mazda's engine development team overlooked the potential of the base 280 HP engine and it can actually make more than that. They used the term "UP TO 340 HP" when referring to the S model but forgot the UP TO part on the base model?
Could it make more on 93? Probably, but only if the engine electronics (the "tune") allows it.
They made them different purposely to differentiate the models.
Here is the info given to the press reviewers which confirms my prediction. 93 octane does not allow the base engine to make any additional power. if both are run on 87 octane there is still a 39 HP and 37 lb-ft difference between the engines.
Computer Personal computer Laptop Black Output device
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So… you won’t be buying one?
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Politics?
They’re offering 2 different power levels at 2 different price points. If you want to spend more on fuel and have more power, select Turbo S.
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The steering wheel on the Turbo S Premium is heated, too.
All but the Turbo Select have heated front seats. Both Premium Plus models have front row ventilated seats and heated second row seats. Turbo S Premium Plus gets ventilation in the second row.
Turbo Premium Plus
Turbo S Premium
Turbo S Premium Plus
3 models
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Mazdausa.com
Go to Trims and Specs for the breakdown of equipment by model.
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