My wife and I took a trip to Atlanta this weekend and we averaged 36.2 MPG. I was totaly amazed,who needs a hybrid with a gas sipper like this.

 

is250, I take it? Very nice.

 

Can you post pics of your car? Reading your signature it seems you have quite a few things on your car that no one has seen on a 2IS yet. TIA

 

I think those are mods to his GS.

 

Lilred GS, you in the correct forum?

 

Pretty good mileage. Although it makes me even happier I opted for the IS350... I've managed to get it up to a 30mpg average on this last tank. I'll trade 6mpg for the extra 100+ horsepower. Although I confess, I've probably only used about 100 of those on this last tank. It's taken a lot of self restraint to actually hit that number.

 

Can you guy show me how to get to that number? My average is 21 mpg.

 

The biggest thing I notice with some drivers is that they are either on the gas or on the brakes. Coasting or looking further ahead to see a stop light and taking your foot off the accelerator does not compute.

 

There are some simple things you can do right off the bat. Beyond those, it takes a lot of feel for the car, and a lot of thinking ahead and paying attention (which everyone should be doing anyway).

- check your tires and make sure they're properly inflated.
- no hard acceleration. Accelerate easily and steadily up to cruising speed.
- keep a gap in front of you. Tailgating ends up with you always either on the brakes or the gas. Leave a 3 car gap and learn to anticipate what's going on in front of you so you can react accordingly without any harsh transitions. Keep everything smooth, be it throttle or brake.
- slow down. Seems obvious enough. My commute puts me in the sweet spot of about 50-70mph on average. Anything above 70 and you're going to start eating more gas. Faster = more revs + more air resistance = more fuel used.
- more "advanced" techniques include things like building up speed on downhills and coasting (or at least not accelerating) on uphills. Obviously only relevant if you happen to live in a hilly area.

Bottom line, it's all about momentum, especially with a car that isn't much of a lightweight. Any time you need to accelerate that mass, it uses fuel. You want to limit how often that mass transitions from a steady state (i.e. cruising)

Obviously, the type of driving you're doing is going to have a big impact. If your commute is 10 miles each way, and it's all stop lights, you're never going to get near the 30mpg I get on my 55 mile one-way commute on back roads at an average speed of about 50mph.

Here's the pic by the way. You'll just have to take my word that I have a 350

 

how come my 250 only reach 24.x mpg with 60% freeway (w/ traffic) & 40% city?!...will the mpg get better when the car reach certain miles?

 

You guys and your funny mpg's. For the last 2 tanks of gas for me = 15.5mpg and I couldnt be happier

Its better than the 11-12 mpg I was getting in my 05 Audi S4

 

I took a trip to Tampa couple of months ago and also averaged 28 mpg doing 80mph. I couldn't believe it either. Everyday driving I average 25mpg 60% hwy.

 

to get near 30 you probably have to do pure highway with very minimal change in speed

 

The car I am quoting is my wife's IS250 RWD. My 99 gs400 had the list mods, but I reciently traded it for another little red car.

 

It was pure highway..I just ran out and took a picture mand this is after my wife was just in 60 min Dc traffic