Yep, that's what I'm thinking.

 

The difference between the x and sport is so minimal. Like stated above a couple tenths of a second. No one is gonna notice that. LOL. Besides we all know which one won on the track!

 

I think so, I know I only put in 87, do you think it would have that big an effect on performance? to where you notice it?


One other item I noticed... the slip light comes on constantly, even under fairly normal driving conditions... does the X model use the sliplight to indicate when it's engaging the AWD? because the car wasn't actually slipping.

 

You mean you only put in 87 in the loaner right?

Please don't tell me you put in 87 in your car.

 

x2 I pray that you don't put regular in your actual car.

And to answer your question, it kills performance since regular gas burns faster than premium gas. Since these engines are high compression engines (lots of compressed air = lots of heat), regular gas will explode before its supposed to (commonly called knock or knock retard) and the car's computer will pull back timing to compensate which results in your loss of performance. If your knock sensors malfunctioned and your car did not pull back the timing, kiss your engine goodbye.

KR commonly happens during higher RPMs.

 

Of Course !! yes mine gets 93 ALWAYS!

 

I wish I could get 93, the highest we have here is 91.

 

So when are you trading in?

 

AWD and 87 octane probably explain everything.

When you drive a car everyday a few tenths of a second (=10hp for every tenth) so 30hp is definitely noticeable.

 

I drove an '07 G35 base model loaner (5K miles) today while mine was getting it's oil changed and the fob swap.

IMO: I can defenatly tell the difference between my sport and base model. The Goodyears didn't have near the grip of the Bridgestones. The suspension seemed softer and I felt less attached to road, less feed back through the steering wheel. It didn't seem to have peep of my car, probably due the 87 gas they use, my baby drinks 93 only. The seats felt softer and had more theigh room than the sport seats. Over-all I'm glad I got the sport model.

 

The paddles seem to be pretty responsive at WOT...The blue guages are pretty sick. The amber pisses me off.

 

Well now the truth comes out. If the slip light is always coming on then it is backing off your power. No wonder it would appear slower. But also it shouldn't be coming on all the time. I always turn mine off but usually only comes on when I really hammer on it. And no it doesn't use the sliplight to in dicate AWD, It is a seamless transition with no indicator. I wonder if the shop could have somehow turned up the sensitivity of slip in the ECM to save wear and tear on the loaner? Just a thought.