I get 35 on my xA.

 

a little of a late post, but dont forget those tests are done at like 55 MPH for highway and I dont remember how much for the city. I use those as slight reference, but in my mind they arent really based in reality for me being that I live in California (most speed limits are 65-70)

 

Always drive downhill, and when u drive uphill, make sure u got a tail wind

 

Yeah, going above 65-70 kills MPG in out little cars! good news is it is about the same all the way up to 90

 

TO all those that want to increase your MPG.... LISTEN up! Your factory spark plugs are worth as much as a performance chip.... nothing! Change them out, check you air filter, and look to see if the factory installed a cabin air filter! (Behind the glove box, $17.00 new) The factory spark plugs are ____, they're rated to 10K, not 30K,your factory air filter comes from a vacuum cleaner company, and 50% of all Scion's have no cabin air filter to begin with, causing your electrical system to work 100% of the time, costing you more fuel. I bought a used 2005 XB, made these little changes, and get 440 miles a tank commuting to college 5 days a week. No hypermiling, no CAI, or exhaust systems, no BS! Oh, and I'm a Mechanical Engineering Major, so, research is my life. Don't believe me, check your nasty, brown, under-gapped spark plugs, they'll back me up. And if you still don't believe the truth, open up your glove box, pull out that cabin air filter tray, and tell me what you see.....nothing right? Over pressurizing your tires, cutting off your engine, pop-starting your clutch.... are you serious, for 4 mpg? Most starters go for $250 installed, clutches are easily $600 for a Honda, it would take you 4 years to get that from those dumb techniques! Hybrids dump that technology into their engines, and kill switches are illegal, ask my neighbor, he's a cop!

 

I used to teach at the university level and often wondered how some people managed to get admitted. At least this guy can put together a sentence but I have to wonder about his math skills. 440 miles per tank just by doing the things almost all of us have already done? Show of hands. How many people own a 2005 car and are still running on factory plugs? Anyone still using the same air filter? Kind of like preaching to the choir, but I don't think most of us are singing the same song. I guess he also missed the fact that this thread is nearly six years old. But research is his life... Really? Could a mechanical engineering major be that new to the internet? Most people know not to just jump into a conversation shouting, "Listen up!" But that would be people, not trolls. I'm just saying ... Btw, he does get the Elaine Benes award for exclamation points. Definitely cool on that one. I also give him the bearsnob award for best late night laugh of the day.

Edit: Not laughing anymore. Just checked. He has three posts. In one he is an ME major, in another he is a full fledged mechanical engineer, and in the third he gets off tricking his wife into believing she has bigger tires. But he still manages to end that post with an exclamation point. So he has one good thing going for him. But lying is never cool, especially when it is done in such a preachy way. I'd like to say goodbye (or better yet, "off with his head"), but I think that is someone else's job.

 

I own a 2005 xB with 212,000 miles.

I inflate tires to 40lbs and drive 65mph and ALWAYS get 32MPG or more.

Someone said going 75MPH couldn't account for 6MPG.... umm yes it can! Driving fast is the #1 gas killer. Tires are #2. Oil has a big factor.
I only use fully synthetic (best, $45 at Walmart), basic oil filter. Firestone tires from Costco, suggested PSI = 29.

Sure the xB isn't easy on bumps but I'd rather save money and inflate those babies.

I have zero mods on my Scion. I used to track my mileage so I'll paste in about 1/3rd of my results as there are so many. (It's in Google keep, thus i can't copy all and paste thus screen shot)
As you can see it goes vary a lot. When I drive it hard, sure I get 30mph, when I drive slow, .... HUGE difference.

I actually created an account to post this.

I'd also like to point out the speedometer is wrong. When it says I'm going 80MPG I'm actually going 77MPH. Thus, 80-77 = 3. 3/77 = 4% slower
all the time than what the speedometer says. Many are like this. Use a GPS app to see true MPH.

 

I agree:
MPGs decrease dramatically at speeds above 70 mph/3,000 rpm.
Remember, you are driving a vehicle with the aerodynamics of a Brick Wall.

I think that I have discovered the "sweet spot" for max MPG. @ 52 MPH (highway driving). Here in CT (not flat but not mountainous) that yields me about 34 mpg.

But, I suffer with 28/29 mpg @ 70 mph/3,000 rpm, because I've got places to go... NOW.

I find that adding a small bottle of Lucas Upper Cylinder Lubricant/Fuel Injector Cleaner to the gas tank every 4 tanks adds about 2 mpg compared to running without it.

Disclaimer:
Oil: Amsoil (Signature Series) 5w-30
Tire Pressure: 33
Tire size: 195/60/15
Wheels: Aftermarket Alloy
Front Struts: Monroe 72245
Rear Shocks: Monroe 5987
Extra weight added: Rear Sway Bar, Tower/Strut Brace, Tow hitch
All else is stock