Gasoline Grade for 2.5L - what are you using?

[Vettereddie]

87 Octane 2025 Maverick Lariat AWD Hybrid 41 mpg
93 Octane 2004 Supercharged Jeep Wrangler TJ - 12 mpg
87 Octane 2014 F-150 Eco-Boost - 18 mpg
87 Octane 2013 Honda Accord - 28 mpg
87 Octane 2014 Fiat - 44 mpg
TBD Octane 2025 Maverick Tremor on order

So what you're saying is if I want better mileage buy a 10 year old Fiat

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[Dave O]

So what you're saying is if I want better mileage buy a 10 year old Fiat

lol noooo not suggesting it but it is a fun little five speed to run errands in also its the easier flat towing vehicles I’ve experienced drop the Manual transmission in neutral pull the keys from the ignition lock the doors and drag it as far as you want to go

 

[Hoagus]

I use 87. Works great!

 

[Packer Bill]

I have used both 87 and 91 octane top tier gas for my Eco Maverick. I tracked mpg with both octanes. I get 2-3 mpg more in town with the 91 octane.

 

[dochawk]

From manual

"For best overall vehicle and engine performance, premium fuel with an octane rating of 91 or higher is recommended. The performance gained by using premium fuel is most noticeable in hot weather as well as other conditions, for example when towing a trailer."

If this isn't a mistake that should only be applied to the ecoboost, I'd love to know why.

There is no energy in octane. Zip. Zilch.

What octane does is deter detonation of the fuel from compression. There either is or isn't enough for the circumstances.

The extra performance from octane on the same vehicle comes when the vehicle is able to detect "pre-knock" (the onset of premature detonation) and to retard the spark (issue it later) as in Cadillac's Northstar, and/or reduce turbo boost (both as compared to when running higher octane).

I haven't heard any suggestion, anywhere, suggesting that the hybrid maverick can do either of those ("I don't even have a turbo. You can call home and ask my wife!").

Advanced timing can improve fuel economy. I've seen claims that the gain on a 472/500 Caddie large block from running premium and advancing the spark improves fuel economy enough to cover the extra cost.

Top Tier, on the other hand, is a standard for detergents & such in the fuel. It isn't oil industry promotion/marketing, but a group of car manufacturers who needed the standard to boost compression (Cadillac, German, & Japanese).

Better cleaners will benefit any engine!

 

[Snowbird]

87

 

[Tiger Dude]

Regular where I live is 87. I use premium now and then on my EB, if I'm going to tow or take a long trip or if I'm just feeling Bougie.

Mid-grade is a scam.

 

[Tiger Dude]

From manual

"For best overall vehicle and engine performance, premium fuel with an octane rating of 91 or higher is recommended. The performance gained by using premium fuel is most noticeable in hot weather as well as other conditions, for example when towing a trailer."

If this isn't a mistake that should only be applied to the ecoboost, I'd love to know why.

There is no energy in octane. Zip. Zilch.

What octane does is deter detonation of the fuel from compression. There either is or isn't enough for the circumstances.

The extra performance from octane on the same vehicle comes when the vehicle is able to detect "pre-knock" (the onset of premature detonation) and to retard the spark (issue it later) as in Cadillac's Northstar, and/or reduce turbo boost (both as compared to when running higher octane).

I haven't heard any suggestion, anywhere, suggesting that the hybrid maverick can do either of those ("I don't even have a turbo. You can call home and ask my wife!").

Advanced timing can improve fuel economy. I've seen claims that the gain on a 472/500 Caddie large block from running premium and advancing the spark improves fuel economy enough to cover the extra cost.

Top Tier, on the other hand, is a standard for detergents & such in the fuel. It isn't oil industry promotion/marketing, but a group of car manufacturers who needed the standard to boost compression (Cadillac, German, & Japanese).

Better cleaners will benefit any engine!

The EB absolutely has knock sensors, pretty much mandatory on a turbo engine.

https://parts.lakelandford.com/p/Fo...k-Detonation-Sensor/75162402/JX6Z12A699A.html

 

[dochawk]

The EB absolutely has knock sensors, pretty much mandatory on a turbo engine.

and state of the art, at that. As I understand it, it can, on the fly, run different timing advance by cylinder! I believe they added extra sensors a couple of years ago that let it gather enough information for this.

But it makes me wonder about balance, too!


tidbit: A breakthrough on the 1924 Cadillac was the dual-plane crankshaft, which finally conquered the harmonics in a V engine. The 1915-1923 Cadillac, and most other brands for I don't know how long thereafter, would get a vibration in the engine that went up and down. Incidentally, that was also the year that front brakes became an option!

 

[Green2025xl]

87 all day the 93 is like a buck more per gallon

 

[710-oil-614]

Top Tier 87.

There is no reason or advantage from running a higher octane in the hybrid.

 

[Maverstang]

There is no benefit whatsoever from using higher octane fuel in the hybrid, and the reason is simple. By design the hybrid engine is never under any unplanned or excessive load and therefore will never see any detonation cases that would benefit from premium fuel. The generator load at rpm curve is fixed in the engine control computer and the engine is optimised for that curve (Atkinson cycle).

Having said that, it is wise to use “top tier” regular fuel with the engine cleaning additives most of the time.

 

[Deleted member 5597]

87 from BJ’s. Runs like a champ!

 

[JDMaverick]

I believe the manual says don’t use anything less than 87 so when going to higher elevations and regular is 86 I use the mid grade. Otherwise the 87 works just fine.

 

[HughdMan]

What grade of gasoline are most Maverick Hybrid owners using with the 2.5 Ltr engine?
Regular (89 octane) or Mid-grade (91 octane)?

I've tried both. I didn't notice much of an MPG increase with hightest. I don't notice much improvement with Economy mode either, but if I use towing or slippery, I do notice a decrease.

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