It's obviously not wrong. We, or at least I am just poking fun.

Not correct, just different.

Someone like tcoat who has a stock motor and drives tons of freeway miles is going to have very different results than a guy like me who only drives the car as a weekend toy, and installed a big blower under the hood that blows E85 thru the motor faster than Johnny Cash can fuck a goose.

I currently commute 45 miles each way on freeways or well-maintained state highways, and there are lots of long downhill sections. '13 BRZ auto, everything stock. I'm averaging 36.4mpg in those conditions over the last 6 months.

Just for contrast, I absolutely do drive it like a Prius while commuting. (In fact, I sometimes get better mileage than my wife's Prius in her much-less-helpful driving conditions). One of the reasons I bought a BRZ is that it's fun to drive even with MPG in mind. I save the "spirited driving" for the track and canyon driving. FWIW, acceleration rates for me are dictated by traffic flow, not by my preference to be fast or slow.

Over 70k miles in 5+ years and a variety of commuting conditions, I've averaged 30.3mpg.

Fully modified with 17" wheels and I also get exactly 21.5 in LA. Don't worry.

I drive city 95% of the time with stop and go traffic. average mpg came out to be between 26-28 and that's me being drive somewhat toughly.

LOL I said I figured that back when this started. I am just poking back really. These MPG threads are always a hoot. It should break out into the AT vs MT brawl any time now.

This ^
It is completely impossible if you live in an urban center to drive it ball out all of the time. Well not unless you don't mind tickets and accidents.

I don't have a fancy fuelly thing set up to record it like i have seen on others profiles...

I have a 75 mile round trip commute plus I have taken two 1,000+ mile road trips. That being said, I try to drive it gingerly when I can but those off-ramps mhm..

I have 2 numbers
I have noticed on Subaru's 0w20 oil and Schaeffer's 0w20 Oil I hit around
30

However, on Schaeffer's 5w30 I get around 32. I hit 37.5 on my 1400 mile road trip to yellowstone and the tetons in WY

Has anyone else noticed a difference in oil weights with MPG?

You had to go there.....

There are likely other factors that explain the gas mileage improvement. 5w30 should yield lower gas mileage than 0w20... a big factor in so many cars using 0w20 from the factory now is to improve the gas mileage ratings for any given model of car.

You can’t calculate gas mileage based on distance travelled without knowing how many gallons of gas were consumed. Just because you stopped to fill the tank doesn’t mean that you used all of the gas in the tank.

OH shit we just hit the Trifecta, Gas mileage, AT vs MT, What is the best oil.

This thread will never die now!

Live on young one!

Theoretically yes, thicker oil is harder to push therefore it should be better to have thinner oil, (strictly in terms of simplified physics and resulting mpg) currently I have 30.7 on my dash display been 1.5k miles since last oil change and 7.5k since it had 5w30 in the car

Need to do more testing though
Hard to have consistency between oil changes though, plus I'm getting it ready for track and autocross this year so i won't be able to get "accurate" data for a little while

You forgot the most important element...

http://i0.kym-cdn.com/entries/icons/...17/994/cac.jpg

Oh we still need to cover lightweight pulleys, sub $2,000 turbos, big wings and the best coil overs for a 3" drop without impacting handling or ride.

FRS- intake, exhaust, tune etc.... All that has made my MPG worse over time. My MPG read out in the display is a filthy dirty liar and says 29ish MPG. There's lies, damn lies and the MPG read out on your car.

I do the calculation by hand and get at best 27, at worst 25. On a recent trip to TN, on open highway all the way on a full tank I did get over 30- going 65 (cops everywhere in GA) with few stops. I got a little under 25 in the mountains of TN having fun on the Tail and cruising around

Half highway from 60-90 (long bridge on my commute) and half city/stop and go. Yeah I do have a tendency to DILYSI at times.

I'm still trying to get the balance right on my car. Between the battery and the bag of groceries in the front seat sometimes, things get thrown completely off.

Just managed 28.83 MPG on my last fill up.

28.7 since i bought the car 6 months ago. On the freeway i use cruise control a lot, but on surface streets i tend to gun it and have fun. I usually get up near redline at least once or twice for every tank of gas and hit at least 5k every time i drive unless its a short trip. gas mileage is actually probably slightly better than stated since i have 18" rims which throws off the speedo/odo a bit.

I know everyone hates dragging these threads back up but after two tanks of a my normal commute getting 27.5mpg I finally did a long motorway trip with the cruise set at 75mph for the majority of the time, I was pretty astonished to get 33.3mpg.

Even better, I think if you consumed the entire tank on an interstate I can now see 34-35mpg being a very real possibility!