Great MPG so far on 2023 CX-5 Turbo

[jadmt]

So for those with the turbo, any truth that using premium improves MPG?

on my 23 I get the same mpg ie 28-31mpg on the highway no matter if I am using 91 octane (generally the highest I can get here) or 87. I have run many tanks of both and when I run 91 I make sure the prior tank is near the E mark so as not to dilute it. If I am in an area where I can really use the turbo I can feel a difference in power but not in mpg. I live in Montana where speed limits are high and enforcement is low so I like use the turbo and sport mode. I just returned from a 500 mile trip where I was rarely under 80mph. my actual mpg is always slightly better than the computer shows. I always fill up the same way so I am confident in my mpg as i check every fill up.

 

[chickdr]

For me, no difference in 87 vs 93 as far as MPGs.

 

[ruthrj]

So for those with the turbo, any truth that using premium improves MPG?

No difference for me. 2000 miles on 93 vs 2000 miles on 87 and tank averages were 25-26 mpg regardless of octane. US driver, majority of gas was Marathon, 10% ethanol content same gas station.

 

[CX5Nut]

Good to know!

 

[hsdejong]

With a 2 liter, natural aspirated manual, 165 hp, mild hybrid with cylinder deactivation CX-5 (2023) engine and 50% highway / 50% urban driving I have an average of 37 mpg (6,3 liter/100 km) gasoline consumption.

 

[ADS-B]

Don't fill it past the shutoff. It can damage something. There was a bunch of threads awhile back about it. When it clicks and shuts off don't add anymore.

I almost always fill it past the shutoff and never had an issue. I try to squeeze in every drop possible.

 

[N7turbo]

With a 2 liter, natural aspirated manual, 165 hp, mild hybrid with cylinder deactivation CX-5 (2023) engine and 50% highway / 50% urban driving I have an average of 37 mpg (6,3 liter/100 km) gasoline consumption.

Hybrid CX-5? Are you from the future?

Anyway, though I see 30mpg on some trips, my tank average is 22 this time. Must be the winter gas partly to blame.

 

[hsdejong]

Hybrid CX-5? Are you from the future?

In Europe, Mazda has been selling CX-5 models with mild hybrid since 2023.
In addition to being slightly more economical, it also makes the i-Stop (start-stop system) very smooth.

What is Mazda M Hybrid?

Mazda M Hybrid is our mild hybrid technology. It uses a small Integrated Starter Generator (ISG) to capture energy that is normally wasted during braking and...

www.youtube.com

Mazda unique mild hybrid system which is included on vehicles equipped with Skyactiv-X.

www.youtube.com

 

[jadmt]

 

[Mazdiod2]

on my 23 I get the same mpg ie 28-31mpg on the highway no matter if I am using 91 octane (generally the highest I can get here) or 87. I have run many tanks of both and when I run 91 I make sure the prior tank is near the E mark so as not to dilute it. If I am in an area where I can really use the turbo I can feel a difference in power but not in mpg. I live in Montana where speed limits are high and enforcement is low so I like use the turbo and sport mode. I just returned from a 500 mile trip where I was rarely under 80mph. my actual mpg is always slightly better than the computer shows. I always fill up the same way so I am confident in my mpg as i check every fill up.

I've noticed a couple of times when I manually computed my MPG it was higher than the dash gauge indicated. I got 36mpg on one leg of my recent 1200 mile trip (2.0NA 6MT)but not as good on the return. Probably wind. I get noticably better MPG with no ethanol gas, no matter what the octane.

 

[furia]

filled up today.
View attachment 317917View attachment 317917View attachment 317918View attachment 317919

what engine oil do you use?

 

[AL Cx5]

Great to get some others noting FE with turbos!

I've tuned our 2024 CX 5 Turbo's ecu, changed to lighter aftermarket wheels, aftermarket coilovers and lowered 1.5". The tune added about 50 HP and greatly improved throttle response. IF we keep our foot out of it, the tune yields better FE. Driving on cruise control helps FE.

Also grounded the engine block, added a smooth bore elbow with turning vane off the air filter box and added a variable flow CAI off of the stock air box. I've posted gains on each of these mods.

We are seeing 33 MPG on mixed driving. Last trip was on secondary roads, US Highways, county roads and some private gravel road. We stayed under 60 MPH and used CC when possible.

Other trips we get +33 interstate and county roads if we stay under 70 MPH on CC

We have about 7,000 miles on the clock...

 

[AL Cx5]

I've noticed a couple of times when I manually computed my MPG it was higher than the dash gauge indicated. I got 36mpg on one leg of my recent 1200 mile trip (2.0NA 6MT)but not as good on the return. Probably wind. I get noticably better MPG with no ethanol gas, no matter what the octane.

I've wondered if E free gas would make a difference. Our CX 5 has a tuned ECU and requires 93 oct fuel so I'm stock with E in the fuel. I'm experimenting with some fuel additives that will absorb water and see if this helps FE...

I treated the current tank with Sta-Bil 360. We will see if it helps. I put is in the tank before letting the Mazda sit for 20 days. If FE looks better, I'll upgrade to Sta-Bill 360 Marine.

It's been reported some Buc-ee's stations have 90 to 91 octane e free fuel. I'll check out the one near me. I'll run a tank and compare FE. Next Sunoco has pump 95 octane...

I normally fill up at 1/2 tank. As the tank has less fuel, it will condense water that the ethanol absorbs, reducing FE.

 

[RedBaron]

I've wondered if E free gas would make a difference. Our CX 5 has a tuned ECU and requires 93 oct fuel so I'm stock with E in the fuel. I'm experimenting with some fuel additives that will absorb water and see if this helps FE...

As long as you don't get gas from a po-dunk station with low usage or bad tanks (and you use and re-fill your car fairly regularly) you won't see much, if any, water in your fuel. Even if you do get water in your fuel, the ethanol will absorb it just as well as any other additive. Note that Sta-Bil, is used to stop old gas (meaning a year or more) from breaking down and causing lacquer to gum up the fuel system. Sta-Bil 360 is supposed to ward against ethanol damage, but modern engines are already built to protected from ethanol damage. Bottom line, using fuel additives will be a waste of money.

As for ethanol and fuel efficiency, yes, it will reduce efficiency some, as ethanol contains less BTUs than the equivalent volume of 'pure' gas. See also: https://www.roadandtrack.com/car-culture/a17240/how-does-ethanol-impact-fuel-efficiency/

 

[AL Cx5]

As long as you don't get gas from a po-dunk station with low usage or bad tanks (and you use and re-fill your car fairly regularly) you won't see much, if any, water in your fuel. Even if you do get water in your fuel, the ethanol will absorb it just as well as any other additive. Note that Sta-Bil, is used to stop old gas (meaning a year or more) from breaking down and causing lacquer to gum up the fuel system. Sta-Bil 360 is supposed to ward against ethanol damage, but modern engines are already built to protected from ethanol damage. Bottom line, using fuel additives will be a waste of money.

As for ethanol and fuel efficiency, yes, it will reduce efficiency some, as ethanol contains less BTUs than the equivalent volume of 'pure' gas. See also: https://www.roadandtrack.com/car-culture/a17240/how-does-ethanol-impact-fuel-efficiency/

Road and Track quoted EPA that it looses 3% or about 1 MPG if the car gets 30 MPG e free. The economies of a gas treatment will not work. That is only part of the equation. Storing e fuel will absorb water faster than e free fuel.

I have an alcohol burning race car. We test our fuel for water with a hygrometer. More than 2% water in the fuel, we dump the fuel. We don't store the car with alcohol in the system. We drain the fuel and flush with e free pump gas. We are very careful not to leave our fuel tanks open to atmosphere and where we store the fuel drums.

Water condenses in the tank as the tank cools off at night. Less fuel in the tank more water can condense. The e in the fuel will absorb the water and hurt fe. It doesn't mater if the water is absorbed or not, the engine has less btu's and fe suffers. ICE engines won't burn water. LOL

Water will shorten the life of our DI engines. It's well documented in the diesel world how water shortens the life of injectors.

My gas generators instructions said to store with the fuel tank full or empty to reduce condensate. I store it with e free fuel with Sta-Bill for insurance. The smaller gen, I turn it on it's side and pour out the fuel. Then drain the carbs.

I agree, I buy fuel at high volume stations when ever possible. I live a few miles from Barber Motorsports Park. I see track prepped cars buying fuel at the Buc-ee's station less than a mile from the track when I fill up.

Our Mazda's have great fuel mileage meters. I'm curious if e free fuel or fuel additives is cost efficient. It's easy to see a difference...

 

[vrsick]

Here's how I track my MPG. Every time I top off the tank, I always zero out the speedometer. At the next refill, I look at how many miles I have and than divide that number by how many gallons I added. Most of the time the computer says I'm getting 29 or 30 MPG. Id rather do it my way.

 

[jadmt]

what engine oil do you use?

5w30 pennzoil ultra platinum

 

[jadmt]

we have ~30,000 miles and have done many road trips using several tanks of pure gas and mpg really has not been any different. going in for new tires tomorrow Michelin cross climate2's. be interesting if they have any affect.

 

[N7turbo]

Here's how I track my MPG. Every time I top off the tank, I always zero out the speedometer. At the next refill, I look at how many miles I have and than divide that number by how many gallons I added. Most of the time the computer says I'm getting 29 or 30 MPG. Id rather do it my way. On the receipt I wrote traction control. Reason for that, I wanted to see if disabling it, would give me more MPG. I did notice I was able to get 2 more MPG. Normally I get 27 MPG.

What was your method of disabling TCC?

 

[vrsick]

What was your method of disabling TCC?

I edited my post.
There's a button on the drivers side bottom panel. At the time I didn't have my glasses on, and I asked my son what did it say. He said it looked like a traction control logo. So I went with that. Just now I looked at it, and I was wrong. It's the lane assistant crap. Sorry for misleading info.