E85 E85 App
Download on theApp Store

Flex-fuel finder & ethanol mixer

Find E85.
Mix it right.
Save on every fill.

The map, prices, and blend math built for drivers chasing cheap octane. Find the closest, cheapest E85 near you — then dial in the exact ethanol blend your tune wants, right from your phone.

Download on theApp Store Try the mix calculator

Now with live, crowd-verified E85 prices Free on iPhone

E85 App on iPhone showing the Ethanol Truth Map — a dark Los Angeles map with glowing green and amber fuel-pump pins marking verified E85 stations, a real-E85 / diluted / unverified legend, and a Search This Area button.
Sample pump reading · E85
Illustrative — your live local price shows in-app
2.49 $ / GAL
≈ −25%
vs. premium · sample
0
Octane · E85

The instrument that matters

Cheap octane, hiding in plain sight.

Race-fuel money buys race fuel. E85 gets you to roughly 100–105 octane for a couple bucks a gallon — if you find the right pump and blend it correctly. E85 App handles both, then shows your true cost per mile so a fill only happens when it actually wins.

15–30%
Typically cheaper / gallon
$/mile
True cost the app compares
LIVE
Crowd-verified prices

Why this is annoying

E85 is cheaper — but the system fights you.

Flex-fuel pays off only if you can find it, trust the price, and mix it correctly. Most drivers strike out on all three.

Hard to find

Only a fraction of stations carry E85, and they hide on back lots and truck stops. Generic gas apps bury the one pump that matters.

Stale, scattered prices

E85 prices swing hard and update slowly everywhere else. A day-old price can turn a "deal" into a loss once you factor in the energy gap.

Easy to mix wrong

Pump E85 isn't a fixed 85% — it drifts 51–83% by season. Guess the blend and you miss your octane target or lean out your tune.

What's inside

Everything a flex-fuel driver needs. Nothing they don't.

● LIVE MAP

Live station map with fresh prices

Every public E85 pump near you, each price stamped with how long ago it was confirmed — pulled from GasBuddy and the national alternative-fuels database, then verified by drivers.

⛽ MIXER

Ethanol blend calculator

Set the target ethanol % your tune wants; it returns the exact gallons of E85 and premium to add — and the octane you'll land on.

★ COMMUNITY

Reports + rewards

Confirm a price, earn XP, climb the local board. Crowd-verified data keeps every pump honest.

🚗 GARAGE

Multi-car garage & compatibility

Save every vehicle you drive and instantly check flex-fuel compatibility before you fill — from the MK7 GTI to the work truck.

◷ FRESHNESS

Per-mile cost, not just per-gallon

We factor ethanol's lower energy density into a true per-mile cost, so a "cheap" pump that isn't actually cheaper never fools you again.

See it in action

The whole flex-fuel toolkit, in your pocket.

Real screens from the app — the map, the mixer, station detail, and your savings.

E85 App Ethanol Truth Map showing E85 stations color-coded by verified ethanol content.
Ethanol Truth MapGreen means real E85, amber means diluted — at a glance.
E85 App ethanol blend calculator computing the exact gallons of E85 and premium to hit a target blend.
Blend CalculatorSet your target ethanol %, get the exact pour.
E85 App station detail screen with a freshness-dated E85 price and community reports.
Station DetailFreshness-dated prices and crowd-verified reports.
E85 App savings screen tracking real per-mile cost and total money saved on E85.
Real SavingsTrue per-mile cost and what you've banked.

Three steps

Find → Mix → Save.

Fuel runs the line in three moves — same as the app.

1

Find the pump

Open the map, see the cheapest verified E85 near you with a fresh, time-stamped price.

2

Dial the mix

Set the ethanol % your tune calls for; the calculator splits the fill into exact gallons of E85 and premium.

3

Bank the savings

Fill up, log it, and watch your per-mile cost — and your yearly savings — climb.

Ethanol fuel calculator

Mix E85 with premium to hit your target.

A live preview of the in-app mixer. Set your numbers — get the exact pour.

Pour this
E85Premium
E85 to add 4.5 gal
Premium to add 9.5 gal
Est. octane ~96 R+M/2

Based on E85 averaging ~70% ethanol. The app reads your region's real-time blend automatically.

The network

Every E85 pump near you. One tap to the cheapest.

Scroll and watch the network light up — every public E85 station, refreshed by a community of flex-fuel drivers.

From the garage

Drivers who stopped guessing.

LIVE
Now in the app
Crowd-verified, freshness-dated E85 prices — the #1 thing drivers asked for.

"Run E30 in my GTI and this nails the blend every fill. The freshness timestamp on prices is the killer feature — no more driving to a stale deal."

Marcus R. · MK7 GTI, Stage 2

"Found three E85 pumps near my route I never knew existed. The per-mile cost view stopped me from filling at a 'cheap' station that wasn't."

Dana K. · F-150 flex-fuel

The E85 field guide

What is E85, and is it actually cheaper?

Straight answers for flex-fuel drivers — no fluff.

What is E85 fuel?

E85 is a high-octane flex fuel made mostly of ethanol blended with a small amount of gasoline. Despite the name, the ethanol content isn't a fixed 85% — by law and by season it ranges from 51% to 83%, dipping in winter for easier cold starts. That high ethanol load pushes the octane rating to roughly 100–105, which is why tuners love it for boosted, ethanol-friendly builds. The catch: only flex-fuel vehicles (FFVs) are built to run E85, so always confirm compatibility before you fill — E85 App keeps that check one tap away in your garage.

Is E85 cheaper than regular gas?

Per gallon, almost always — E85 commonly runs 15–30% below regular gasoline. But ethanol carries about 27% less energy per gallon, so your MPG drops and the sticker price tells only half the story. The honest way to compare is cost per mile: as a rule of thumb, E85 comes out ahead when it's priced at least 20–25% cheaper than regular. That's exactly the spread E85 App tracks in real time, so you fill up only when the math truly works in your favor.

How do I mix E85 with premium gas?

Blending lets you hit a precise ethanol target — say E30 or E50 — for more octane without committing to a full tank of E85. Because pump E85 varies, the right ratio depends on its actual ethanol content and the premium you're cutting it with. The calculator above (and the in-app mixer) solves it for your exact tank size and target, then estimates the resulting octane. Find a station, set your target, pour the gallons it tells you — done.

How do I find E85 stations near me?

Open E85 App and the live map surfaces every public E85 station around you, each price freshness-dated and sourced from GasBuddy plus the national alternative-fuels database, then verified by the driver community. Filter by price, distance, or most-recently-confirmed to land on the cheapest E85 nearby — and confirm flex-fuel compatibility before you fill.

Is E85 bad for my engine?

In a flex-fuel vehicle, no — FFVs are engineered with ethanol-compatible fuel lines, seals, and sensors. In a standard (non-flex) car, running E85 can damage components and shouldn't be done. Check your garage in E85 App if you're unsure.

Why does my MPG drop on E85?

Ethanol holds roughly 27% less energy per gallon than gasoline, so you burn slightly more volume for the same distance. That's why E85 App compares cost per mile, not just price per gallon.

What does E30 or E50 mean?

The number is the ethanol percentage of the blend. E30 is 30% ethanol, E50 is 50%. Tuners pick a target for the octane and power they want, then blend E85 with premium to reach it.

Where is E85 cheapest?

E85 is most common and cheapest across the Midwest corn belt, but prices swing locally. The app's live map and price history show where and when to fill near you.

Is E85 App free?

Yes — E85 App is free to download on iPhone, including the station map, live prices, and the ethanol blend calculator.

Find E85, save with the mixer

Your next fill-up should be cheaper.

Download E85 App free, find the cheapest E85 near you, and dial in the exact blend your tune wants — the cheapest way to a higher-octane fill.

Download on theApp Store