Using Premium Fuel 2.3L

[bronco100]

What happens if there's like a gallon of 89 left and then you fill up with 93?

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[JNY]

What happens if there's like a gallon of 89 left and then you fill up with 93?

That happened to me. I waited until the warning light came on saying I had 50 miles left of fuel, about 2 gallons. I then filled up with Premium (93). That is why I went through several fill ups to make sure I was getting a good reading on MPG. Have stayed the course and have over 1000 miles on Premium. So far have gotten almost 2 MPG increase along with the increase in HP. So far nothing negative has happened, to answer your question. I am not a chemist, nor do i play one on TV, just giving you my two cents. Maybe someone more knowledgeable can chime in.

 

[NC_Pinz]

What happens if there's like a gallon of 89 left and then you fill up with 93?

It blends together and you net an effective octane between the two, closer to 93. Nothing more than that.

 

[GToddC5]

I was running nothing but premium for 6-7 months until prices got really stupid for a while there. Right around when I switched to regular, I started using the A/C full time. The poor little 2.3 felt neutered, but I marked it up to the A/C. Well, I just filled up with premium yesterday and the power has been mostly restored while running A/C! Anyone that shrugs off 25 HP and thinks it can't be felt, is mistaken.

 

[rtazz17]

I was running nothing but premium for 6-7 months until prices got really stupid for a while there. Right around when I switched to regular, I started using the A/C full time. The poor little 2.3 felt neutered, but I marked it up to the A/C. Well, I just filled up with premium yesterday and the power has been mostly restored while running A/C! Anyone that shrugs off 25 HP and thinks it can't be felt, is mistaken.

still not worth it

 

[GToddC5]

still not worth it

Having more pep makes it more fun to shift gears, so premium has value to me. I average 20 miles per day throughout the entire year. Figure 7300 miles is a conservative 400 gallons of fuel. Let's say I spent 50 cents more per gallon all year, we're talking about saving 200 bucks at the cost of pep? Nope, I'd rather have the pep. And now that I laid that example out I probably won't switch back to regular again, unless prices get really stupid

 

[Dogula]

Engine specs from Ford website.

 

[Bruzer22]

The old adage used to be $1 per HP when doing upgrades. Using premium instead of regular is like a HP subscription. Instead of dropping $2500 all at once, you're paying for it over the life of your Bronco every time you fill up. If you don't want it, no harm no foul, get your 275HP for free!

My GX460 required premium, so I've stuck with that for the Bronco. I didn't buy the Bronco to save money at the pump.

 

[IDAbronco]

What happens if there's like a gallon of 89 left and then you fill up with 93?

Well let's say you add 18 gallons of 93 octane to the 2 gallons of 89 octane you had remaining....

((V1 x C1) + (V2 x C2)) / (V1 + V2)

((2x89)+(18x93)) / (2+18) = 92.6

So, you would be running approximately 92.6 octane fuel.

Lucky for you, unlike the other poster I am a chemist LOL

 

[Kramku1]

2.3 2 Dr sasquatch 1 mpg more with premium not sure it's financially better though

 

[bronco100]

Well let's say you add 18 gallons of 93 octane to the 2 gallons of 89 octane you had remaining....

((V1 x C1) + (V2 x C2)) / (V1 + V2)

((2x89)+(18x93)) / (2+18) = 92.6

So, you would be running approximately 92.6 octane fuel.

Lucky for you, unlike the other poster I am a chemist LOL

Fantastic haha. But how does this actually affect the vehicle's performance? I assume the ECU is looking for a particular octane in order to change fuel maps and get those extra 25 horsepower.

 

[Big Boss]

I just split the difference and run 89. I have noticed that using gas from a "top tier" does make a difference. When I was using BP I was averaging 21 to 22MPG. If I use Shell or Mobil I am in the 24 to 25 range

 

[Fmuguira]

Engine doesn’t have different “maps” …. It s set up with knock/detonation sensors which will let it determine how much boost and ignition timing it ll take without detonation …. If sensors get detonation ( pre-ignition is another way of saying it) then the engine will retard the timing and cut some boost. ( both of which decrease HP and torque)

 

[JNY]

I just split the difference and run 89. I have noticed that using gas from a "top tier" does make a difference. When I was using BP I was averaging 21 to 22MPG. If I use Shell or Mobil I am in the 24 to 25 range

Are you mostly highway driving and stock tires?

 

[SasquatchMansquatch]

For most driving it shouldn't matter and doesn't seem to add enough MPG to offset the cost increase.

But for towing, I think it is probably worthwhile.

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