Yes. For some reason the internet has given people the power to create their own "facts."

It's a sad regression for the human race.

I read youtube comments occasionally and it makes me fear for our future as a species.

 

I've used 87 on all my vehicles including a 1980 malibu and a 1985 trans am h.o and to be honest tested and never saw a difference in mileage so i stuck with 87 and both cars did winter driving both on 87 and they ran the same all i do is every now and then i run octane boost it's cheaper i do that every 6 months or so

 

Excuse, but is there a bottom line to all of this? Does it make sense to run 89, for instance, rather than 87? Will gas mileage generally improve, and will it be better for the engine?

 

lbc Many discussions involving fuel octane and oil have no bottom line... some good facts have been presented on the forum supporting the use of premium fuel. A whole lot of emotion surrounds many of them. It intrigued me.

I ran w/ premium for 4-5 months. Local driving and a few long distant trips and did feel a slightly better 'butt dyno' response on the throttle. Also thought I was seeing an increase in MPG.

I then switched back [and continue to run] to regular and did see an increase in MPG.?.?...

With the season changing fuel 'formulas' change as well as the weather and MPG will change too.

I've discarded the notion that premium fuel is the way to go, least for me and my FIT.

The Fit is designed to run on regular fuel 87octane or higher. The choice is yours. No ill effects will befall your Fit's engine. A few weeks on premium might give you that butt dyno feel, but truthfully regular fuel runs just fine.

MPG is more a result of your driving style. The 40MPG I see today has a whole lot more to do with where and how I drive than the fuel grade I put in the tank or the type oil that goes into the crankcase.

K_C_

 

Ive topped out at 33.5, but I'm only on my fourth or fifth tank ever in this car. I try to hyper-mile when I can, but the Fit is so fun to drive (even an AT), that I can't help but get my zip on!

 

Krimson Cardinal has it pretty much spot on. 87 vs. 93 is a question that you can only resolve by testing it with YOUR car and driving style.

I tested it, and I personally prefer 93, for that 'butt dyno' kick at low RPM. I also get somewhat better mileage with MY particular driving style with 93.

Krimson Cardinal tested it, and found that he prefers 87, ostensibly because it's less expensive.

Your mileage, as they say, may vary.

 

Well thank you S&D Why that's not been pointed out to me before is baffling__

 

You're welcome

 

at an extra 10 to 20 percent a gallon 20 cents is just to much i drive city all lights it isn't worth it and and i dont have that kind of money

 

Am I the only one confused by this post?

Are you saying 20 cent per gallon is too much to pay for an extra 10 to 20 percent in miles per gallon?

Considering gas costs upwards of $4, that 20 cents equates to 5% (or less) of the cost of a gallon of gas.

Unwilling to pay 5% of the costs for 10% benefit?

Is that what you are saying?

edit: I don't understand your whole "I'll add octane boost every 6 months" either.

How do you use octane boost? I mean, you buy a single bottle... how much of that are you supposed to use PER tank, or rather per X gallons of gas? How much of an octane boost ARE you getting? And how much does it cost?

Based on some quick googling... it seems to me, that it costs more to use octane boost on 87 gas, than to just pump 93... or whatever other octane level you're trying to reach. Even if it's just once every 6 months.

edit some more.... I just don't get it. maybe I'm just STOOPID. @.@

 

which gasoline brand would any of you trust more? is the gasoline form shell more cleaner than the gasoline from arco or sam's club?

would buying a cheaper gasoline would give the car's engine gunk in the long run?

 

Depends more on how the station than the brand. old rusty tanks with unchanged fuel filters, rusty pumps that shortchange you a little bit and drop a little sediment into your tank, or low turnover and "staler" fuel is going to make more of a difference then the fuel that was dropped off from the tanker truck. Of course, whatever gunk that it may leave, can be fixed quickly with other fuel. What's the point of having all these new-fangled cleaner additives if there is nothing to clean.

That being said, you could probably expect that generally the toptier brands to have a better baseline minimum standard of quality than the independents who didn't join that marketing consortium. Plus they'll have a cleaner restroom that won't make you want to vomit.

 

Top Tier brands are good. High volume stations are better no matter what brand fuel you use. Rusty old tanks are, for the most part, a thing of the past. Underground storage is fiberglass tanks these days. EPA has had a lot to say about that.

edit: top tier is all about the amount of cleansing additives used. It goes beyond the EPA stated minimums.

 

I dunno, every time I fill up at Valero or Arco my car runs like crap. Bad idle, less response.

Having said that, it always seems to run best on Chevron.

Considering those are opposite ends of the cost spectrum, I try to stay with Shell or Mobil, in the middle.

I've listened to people who say "it doesn't matter" and tried real hard to believe that, but my ears, eyes and feet have told me otherwise for a long time.

Octane booster is only worth it if you're pumping 91+

 

i always use shell, always the highest octane, but w/ gas at $$$$4
i have been force to downgrade ---> arco 87

 

trial and recording my friend drove many different cars tried many different gasses and to be honest I never saw a difference ever in the twenty years of driving and I have read in many reputable articles on the subject to see if i was the only one that thought like this on mileage if i had a high end like a skyline you might see a difference cause you have so much horsepower reading my friend been doing it for twenty years and twenty years experience mold my thoughts sorry if you disagree THATS MY OPINION EVERYONE HAS ONE IF ANYTHING JUST AGREE TO DISAGREE.

 

If you never push down on the throttle enough that there will be maximum ignition advance with 87 octane you're not have anymore advance with 92 octane.... I wouldn't pay the difference in price between 87 and 92 octane if I couldn't feel a difference or see the difference in timing advance on my scan gauge..

 

maximum timing advance is at cruise with no/low load TC..

 

i lived in pa for 10 yrs near the turnpike or as they used to call it the pennsy speedway with olds 3.8 98 regency and then a 1980 malibu in top physical condition they moved great cause i tuned em every month they would move like rockets lowest speed was 75 to 80 both gasses never saw any change but like i said different experiences for different people my foot is my scan gauge lol my dad taught me the old school way on how to manage mileage but thats how i test its not for everyone

 

You cant compare old technology to new. Honda and all cars from 96 has a form of adaptive timing due to the knock sensor. Premium is about 6 percent more efficient if knock is not present and more if your car knocks on regular which a black sooty tailpipe that you can do a wipe test with your finger is the tell tale sign.

Air Fuel Tuning | Tuning A/F | ECU Tuning Info on the ecu timing.