My G35 is slower for the second week

[oopsip]

I just bought my new g35 almost two weeks ago. I loved it a lot for the first week but, after filling up the first tank of premium gas, I feel like my car is slower and heavier. It is harder to accerelate. What is going on?

Thank you in advanced for your inputs.

[G_whizz]

Is it brand spanking new? Are you driving with the VDC off? If it's brand new break her in a bit before hammering it. I'm at a loss, not sure why it would be slower. Do you mean sliggish?

[oopsip]

Yeah, I could say it 's sluggish. I feel the car is heavier to move. I need to drepress the accelerator pedal harder to achieve the same speeds as the first week's. The mileage is 660 and I didn't know about the break-in until yesterday.

I didn't follow the break-in procedures a couple time such as,

Drove 50 miles at 80 Mph for almost 30 minutes.hard breaking once since there is an accident on a highway.

Did I screw her already?

Can someone tell me what I should expect about the engine performace during the break-in?

Thank you so much. This is my first time to buy a new car so I don't know anything. I appreciate your help.

[WESIDE]

Any car that has a full tank of gas will be sluggish. Hence the 160 to 170 extra pounds of fuel in the car. Try flooring it on a near empty tank

[AZhitman]

I think part of it is simply the "new" wearing off.

When I first bought mine, I was like "WOW - This thing HAULS!"

Now, I find myself thinking, "Damn - I need boost."

[oopsip]

Do you guys think gas matters? I just called my dealer. They use Shell but I am using Chevron.

[AZhitman]

Not unless you got a bad tank...

Time to schedule a dealer service. Have them check it out - "Loss of power" is a common symptom of a lot of things.

[oopsip]

I also hear like hum noises after I drove the car for about 10 seconds after it is started (low gear). I don't hear the noise after even after it stops waitng for the traffic light. Is that normal?

[RED_DET]

The sound you are hearing is probably the abs, it is normal. I also think you are just becoming more accustomed to the power therefore it feels slower. But as someone said, you add weight to any car and it becomes slower.

[g_ride]

ill agree with that when i first got mine i went from a lowrider chevy to a infiniti and i was like whoa when i steped on it now iam gettitng use to the power i want more power i got rid of the truck bug now i got the speed bug its addicting

[redhed]

methinks you simply got a tankful of regular gas vs high octane. i can tell on my car when that happens...especially with top-end performance. doesn't ping or anything...but it certainly doens't have the ummmppphh it has with high octane.

[oopsip]

My car is faster now. I don't know why. I feel it gets back to normal for a couple days and then it is getting heavier again today. Is that just my feeling? I don't think so.

[AZhitman]

I'd invest in a G-Tech Pro - cheap on ebay, and better than a butt-dyno.