Official Gas Mileage Thread

Is that corrected for your larger tires?

 

Yes. I added 8% for tires. I've seen both 7-8% reported for 285's.

 

I think I'm going to fill up with ethanol free tomorrow and see what I get. We've been taking my truck pretty much everywhere we go with the snowy weather and I'm getting tired of 13.5-14mpg haha. If I got 14.5-15 with winter blend I'd be a happy camper.

 

Last time I filled up with ethanol free I didn’t notice any differences. Just my experience.

 

Yeah I'm not sure I'll notice any difference. I'm actually pretty curious if there is more of less difference in winter blends. I don't even know if the ethanol free has a winter blend anymore.

 

I noticed ethanol free here is 90 octane. I'm wondering if I would be better off getting 93 octane with ethanol in it. I'll report back after this tank and see if ethanol free did anything.

 

Ethanol free 87 in my old T100 made a pretty big difference in mileage...it was on the order of 1-2 mpgs if I remember correctly, but may have been more. The problem was my mpg increase wasn't offset by the additional cost of ethanol free gas, so it was still more $ at the end of the day. Truck ran great on it, though (might have been a placebo effect, but I swear that thing ran smoother).

I'm planning to try this in my Tundra once I'm near some e-free 87. I see no reason to spend more on a higher-octane e-free gas...just makes the numbers worse.

 

Same here. I saw 1-2 MPG increase but ethanol free gas is .70 more here. I just can't remember what vehicle that was. I think it was my old Corolla so I'm doing the test again in the Tundra just out of curiosity.

 

I don't recall the price of mid grade right now, but the difference didn't seem like it was much. It was maybe .50 more but I don't recall. I just figured I'd run the numbers and go from there.

 

Yep...gotta see the mpg results and *then* find out if you paid more at the end of the day, haha. Only way to do it, unfortunately.

 

Got 13.8 MPG last tank! I think my tundra just hates city driving. 14.5 corrected.

 

Looks normal.

 

I'm officially out of checking gas mileage. Went years without ever wondering....got back into it a few months back and depression sat in. I'm just gonna pay it and spend more on mods you young wooper snappers keep coming up with. New head unit is on it's way.

 

BS govt purpose to introduce production of ethanol gas over traditional additive free gasoline was to cut down on air pollution. Even though combustion emissions from use of ethanol fuel are lower than those of traditional ethanol free gasoline, production emissions from ethanol gasoline are higher than additive free gasoline production. Thus, the replacement purpose negates itself.
Also, if ethanol gas doesn't produce as much energy as the ethanol free gasoline, it takes more ethanol gas to get you there than non ethanol gas usage would take.


"Non Ethanol fuel:

1. It improves mileage.
It has been reported that oil mixed with ethanol has less fuel efficiency. Energy-rich pure gasoline has higher energy content so it delivers more power when burned. And because your engine is able to convert the fuel into more kinetic energy, you get to use less fuel but achieve more mileage.

2. There is less harm to the engine.
Gas mixed with ethanol has a negative effect on engines, particularly those of older models since these weren’t designed to run on ethanol-mixed fuel. Some of the problems reported are the breakdown of old rubber seals and an increase in vapor pressure which may cause a vapor lock in the carburetor. Aside from that, ethanol attracts water, increasing the risk of rust forming on the interior engine parts.

3. It makes us less dependent on ethanol crops.
When the United States government decided to add ethanol to gasoline, more farmers started to grow corn but the price of this crop and its leading products increased. But if more people use pure fuel, we become less dependent on ethanol crops, and hopefully this will bring down the price of corn."


ref; connectusfund.org


Yet our law making geniuses continue to stay with what isn't it was said to be, and are increasing the worthless ethanol additive content for selfish reason that doesn't benefit the atmosphere at all. All the while the worthless ethanol fuel at the pumps cost increases which only benefits the lawmakers that much more. Lawmakers won't say goodbye to generous contributions from powerful agricultural lobbyist.
The American way!!!

 

not when you’ve been getting 9-10 the last few tanks.

 

I've never been one to care about gas mileage, because I have the vehicle I want it's everything I need, but I will say this 2000 I have gets incredible gas mileage.......if I so chose to, but the power takes over the will to drive slow. I noticed a difference when I fill up with Ethanol, I think it's the smell out the exhaust, but I wish I could get that all the time. Only place I know is home in Binghamton. It's only 91.

 

11.75 MPG

All city driving. Some idle time. Some towing.

 

2000 Tundra SR5 stretch cab, 3.4L V6 running 87 octane crapanol (10%) I get 15 mpg around town, out on the road running 65-68 mpg I get around 17. With fresh high octane crapanol and some Sea Foam and Marvel Mystery Oil in the tank I've seen up to 18 mpg. Above 70 it drops noticeably. Mostly flat East Texas roads, readings taken spring and fall without the AC running...measuring consumption at the pump, doing the math by hand. Stock engine and air breather, new plugs, coil packs, and clean MAF.
Almost as consistent as the 4-5 Ford 300 I-6s I have run in my life of driving. Carbed or fuel injected I could always get 16 mpg...sometimes as high as 18. A beast of an engine with long life expectancy...as long as you watched the oil level.

 

I filled up with ethanol free the other day and will report back on the mpg results. On the plus side of was only $0.20 more than mid grade here which is 87. I think the ethanol free was stated as 88 octane. Power feels identical at this point with maybe slightly less downshifting on the freeway. I did pull a bigger hill yesterday at 75-77 without shifting from 5th and that surprised me. Maybe it was a tailwind or maybe there is some magic petrol pixies working behind the scenes. I need to drive my regular route a couple days and see if it is in fact, behaving differently.

 

You are lucky. Ethanol free is .70 more per gallon here. Insane.

 

I once thought of ethanol free, looked for the One station in Austin, Tx and noticed it was $0.55 more per gallon, I quickly calculated I could not possible make up the cost difference in additional fuel efficiency.

Sorry Mr. 5.7, no ethanol free for you except maybe this way:

$25 STAR BRITE Star Tron Enzyme Fuel Treatment - Concentrated Gasoline Formula - 1 oz. Treats 16 Gallons - 32 OZ (093032)

https://www.amazon.com/Star-Tron-En...quart+of+startron&qid=1579525715&sr=8-1-fkmr0

Luck all.

 

Best fuel savings recco is to shed weight off the truck and drive like @Darkness with his dongle plugged in sans 4WD and stinkin’ sway bar.

 

A hill climb to me is hitting the speed limiter before you get to the top........and forget the overdrive.

 

I'm a bit surprised at the mileage reported on here. I have two Tundras (2000 SR5 Access Cab, 4X4, and 2006 Limited double-Cab 4X4, both with 4.7 Liter V8 engines).

Around town... 15 MPG routine for both... and I'm NOT a light-footed driver.

Highway (SF Bay area to Lake Tahoe via I80 through mountains) driving at 72-80 on the Interstate, followed by local AND off-road driving in Sierras north of Truckee, CA (5,500 to 7,200 feet elevation)
CONSISTENTLY get 16.6 MPG (on both vehicles).

My 2000 SR5 has a 200 Lb shell, a 75 Lb front brush guard, always carries ~40 Lbs of tools and emergency gear, plus ~400 Lb for wife and me including clothes/backpacks; i.e, over 700 Lb of cargo.
... NO performance modifications to either vehicle (except just installed LED headlights, so N/A for mileage impact).

My 2000 has 112K miles, 2006 has 6,500 (my wife never drives "Her Vehicle" which has heated leather seats and much other BS). Yes... 6,500 miles on a 2006 Tundra Limited... what a waste!!!

OTHER:
After switching to Mobil 1 synthetic motor oil (5W-30W), I observed ~10% improved mileage and was much easier to maintain 75 MPH on the highway (less gas pedal depression). Apparently the lower engine friction yields more horsepower (as expected).

Side note... My 1995 T100 (6-cylinder, 3.4 Liter) with 150 Lb shell gets 21.5 MPG routinely for trips at 55-70 MPH.

NOTE: I added tire sizes in a separate post #138.

 

Tire size?

 

I got 15.6 on my last tank. An all time record. All highway and right after an oil change to 5/30 synthetic.

 

Now that I have a longer commute for the time being, my mileage has returned. getting around 14MPG at 50/50 highway/city. It's CRAZY how much idle time and short trips affects my MPG.

 

That is really odd. I do a lot of short trips and almost 40% city driving and I pretty consistently get around 14-15MPG. And we know from your Blackston labs report that your engine is healthy.

 

yes, but my short commutes to work are 15 minutes of idle in 0F degree temps, a 1.5 mile drive, and repeat at the end of the day. If I go somewhere for lunch or whatever, it's under 5 miles. The truck never even gets to operating temperature.

 

Ah. That makes sense. I know when it's cold out and I start my truck it idles really high too. You just need to move further away from work. Problem solved!