jasonlitka

Yeah, I think being in S prevents V4 mode. 19mpg is pretty bad for highway cruising. Was the engine warmed up? I've found out that the best way to get good mileage out of this thing for short drives is to actually drive the first 60 seconds semi-aggressively to heat it up quickly.

I did my normal drive to work today and hit 22.1MPG, even after the 8% negative correction I made last weekend. That same drive was about 16MPG in my Infiniti G35x.

amelen

Yeah, I know S mode turns it off but it seems like dynamic engine mode makes it turn on less often.

jasonlitka

I've been driving the past week or so exclusively in Dynamic, 95% of the time in D rather than S, and I spend a good amount of time in V4 mode. It even stays there during mild acceleration.

amelen

I have to watch it again, I don't know what I'm doing wrong but it's never in v4 mode even though my commute is mostly highway cruising.

jasonlitka

Try setting the cruise at 80 and letting it drive for a bit. I did that from King of Prussia to Exton earlier and I think I spent 75% of the trip on 202 on 4 cylinders. If it's still not cutting back there may be something off...

amelen

And you were in Dynamic engine mode, right? How many miles did you have on the car? I tried cruise control at 75mph and it barely went into 4cyl mode (less than 10 percent of the time). Start stop seems to barely turn on too, maybe it was just more intrusive on the porsche or maybe the car hasn't fully broken in yet.

joe0816

Mine only seems to go into 4c when I am going downhill on highway. If the road slopes up at all I switch back even when maintaining speed.

litmaner

I am still awaiting delivery of the Sepang Blue S6, can't wait. That's very coincidental, jasonlitka my dad and I love our 07' g35x.

subterFUSE

This is not true. The ONLY way to prevent 4 cylinder mode is to accelerate. Even in S mode, if you are cruising at constant speed the 4 cylinders will shut down.

I know this is a fact because back in March I was entering a car audio show in Daytona. One of the rules was you had to have less than 1/4 tank of gasoline to be allowed to drive into the arena. I had too much gas in my car, and had to burn off the extra fuel. I put the car into S mode because I thought it would prevent 4 cylinder mode. It doesn't.

I had to constantly increase and decrease speed in order to keep the all 8 cylinders firing. It was a pain in the *** trying to get my fuel mileage to be low. I ended up getting off the highway and running the car in manual mode at low gears to keep the RPMs up. It took me about 2+ hours of driving around in circles to burn off enough fuel to get into the arena that day.

jasonlitka

Dynamic, but with the transmission in D, not S. About 600 miles, but my car spent a decent amount of time on V4 on the original ride home.