Civic POP Crew #3
In an non performance car most people don't "need" higher octane fuel and the cost of using premium and gaining anything from it is not worth it for
"most" individuals. I'm not saying there isn't anything to be gained but the car works fine on the minimum, so it comes down to is it worth the cost of the premium fuel. So for individuals who like to play the let see what kind of mileage I can get by doing this exercise, well then then the cost doesn't matter to that individual. Hell you can gain mileage "supposedly" by going to a high viscosity index oil such as TGMO which was designed with fuel mileage in mind.
You can't fix stupid!
Never argue with an idiot, they bring you down to their level and beat you with experience.
There is also a learning curve that goes with changing fuels and oils. The engine does get more efficient but it takes a few tanks just as with oil there is period the oil is cleaning and the additives start breaking down. Your driving style will have to change too and that is because if you drove the same way you will just use more fuel than needed so the benefit is lost. You can easy up on the pedal and have the same acceleration but using less fuel which is using lower loads at higher efficiency, using regular you wont see this and you usually have to give more fuel to keep accelerating the same.
Civic POP Crew #3
I filled up today with the first 1000 miles on this new car. Today's fill up is with with the 87 octane ethanol stuff. I'll check the mileage closely with the ethanol gasoline and see how it compares with the non ethanol 92 octane gas. So far the 92 octane gas delivered an average of 35 mpg with mixed driving, some mountainous and town, but no interstate high speed.
The 92 octane without ethanol runs perceptibly smoother and produces slightly more power in my car; but there is not much difference. Also, the 92 octane gets about 1.5 to 2 mpg better mileage. But is it worth it? Probably not; but it was an interesting experiment and now I know. I'll have more conclusive data with the next fill up.
The only thing worse than ethanol gas are the politics behind it. If the 92 octane non-ethanol didn't cost $1.11 per gallon more than ethanol I would use it.
In reality fuel consumption depends on driving conditions, traffic,acceleration, temperature, load, wind velocity etc.
I am useing a 20 mile roundtrip for my tests, same time of day, and cannot see any better miles with the higher octane gas.
The Civic is optimized for use of 87 gas! Any improvement with 89 or 91 ia incidental.
Save your money and use 87 regular.
You're know there is opposition on that claim, ds.
At least one member has shown that the difference between 87 and 89 is minimal at best, but 91 or 93 does make a difference. You also need time for your ecu to adjust to the change to realize any significant change.
And if you're gonna do the experiment, go big or go home. Iow, use 91 or better over at least 3 tanks, and then report back.
'Three pedals or bust!'
'Come for the cars. Stay for the people.'
'Part of having the right to free speech is knowing when to not exercise it.'
‘Say what you mean, mean what you say, but don’t say it mean.’
9th Gen Civic POP Crew #6 Hidden Content
9th Gen Civic LI Crew#1 Hidden Content
Just noticed this when trying to troubleshoot a VERY heavy winter MPG drop (from around 32 (fall) to 25.6) lately and saw this about "...reset[ting] the learned parameters by cleaning codes with out codes."
① Should/could I do this on a '14 CVT sedan that I'm currently running and if so ② how do I go about doing it and ③ how can I check the amount of Ethanol I'm getting in my current blend from my local retailer?
Ever since the advent of "smart phones", we aren't any smarter any more... we just know how to find it faster.
You can reset the ecu but I would wait until you change the air filter. It takes about 5000 cycles for the ecu to adjust on it's own for ever load and rpm. All fuel sold will have up 10 percent ethanol unless otherwise marked. Ethanol is not the issue because as it warms it causes the engine to more efficient compared to pure gas. Your mpg will get better as it warms up outside and winter fuel is changed to summer fuel.
Civic POP Crew #3