Is350 mpg
01-18-12, 10:04 PM
#16
But as far as the MPG goes, there's too many variables that go into how much MPG your getting. Where you drive mostly (city/highway), temperatures, car service history, tire pressure and most importantly, the way you actually drive the car - all have an effect on the resulting MPG you get.
Some people get 12 mpg out of their IS350, others can get 30+, it all depends on a variety of factors.
01-19-12, 05:29 AM
#19
It's not super common to get >30 highway in a 350... but 28-30 is very common. (and my window sticker said 20/28 when I bought my car in 2008 FWIW using the "old" mpg system...and that has seemed pretty accurate in my experience.... (it's more like 20-22/28-30 depending on conditions and driving and whatnot).
I've never gotten as low as 26 mpg for any all-highway tank of gas when I've taken roadtrips... 27.5 or so is about the worst I've gotten on such a trip and that was when the car only had a few hundred miles on it.
01-19-12, 11:54 AM
#24
I have a semi-related question not worth starting a thread over: What are people seeing as the average drop in MPG in winter vs. summer driving for their IS350?
I understand that for a lot of reasons, your gas mileage in the winter will be worse than in the summer holding all else equal (http://www.metrompg.com/posts/winter-mpg.htm).
So what kind of drop are you seeing?
I ask because this past weekend I took a long 400 mile road trip or so all highway driving, and I got 25.6 MPG or so for the tank. This was almost 100% highway driving.
In warmer, summer weather, it wouldn't be unusual for me to get 30-32 MPG on the highway.
So is that drop for winter conditions in line with what others are seeing?
I understand that for a lot of reasons, your gas mileage in the winter will be worse than in the summer holding all else equal (http://www.metrompg.com/posts/winter-mpg.htm).
So what kind of drop are you seeing?
I ask because this past weekend I took a long 400 mile road trip or so all highway driving, and I got 25.6 MPG or so for the tank. This was almost 100% highway driving.
In warmer, summer weather, it wouldn't be unusual for me to get 30-32 MPG on the highway.
So is that drop for winter conditions in line with what others are seeing?
01-19-12, 12:03 PM
#26
I usually get 18-19 MPG according to the on board MPG-meter, I've only had it for 34 days.
09' IS350 w/Factory 18"
Edit: oh and auto climate on all the time.
09' IS350 w/Factory 18"
Edit: oh and auto climate on all the time.
Last edited by 707IS350; 01-20-12 at 08:08 AM.
01-19-12, 01:29 PM
#28
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I've only got 500+ miles on my 2012 IS350 AWD so I don't have a large sample size but it looks like I'll be getting around 20 mpg on average. But then again I have been "experimenting" with it a bit 
I'm assuming that I'll take a hit for the AWD as well.
I'm assuming that I'll take a hit for the AWD as well.
