Gas Octane

Scientists - Chemists - Chemical Engineers - Consumers Advocate Groups - They are wrong and you are right .

You get more miles out of your truck with HIGH TEST
hey man it is your money - enjoy

 

I run Shell's 91 in mine, which is a Top Tier fuel. I think I get excellent mileage. The performance is whatever it is.

I know that a minority of cars will perform better on premium, and a minority will perform worse, and most won't perform any differently at all. But that's not why I use Shell's 91. I use it because it contains no ethanol.

 

This is especially true if the regular fuel contains ethanol, which doesn't have the energy content of gasoline. I, too, get better mileage on premium, as long as it's ethanol-free.

 

x2.

I run only Shell and BP fuels (93) in the truck because their detergent levels exceed federal requirements (even though BP isn't in the "top tier" cabal), they're widely available, and there's no ethanol in Shell.

The DD gets 87 octane Shell/BP, again for the high detergent levels.

 

i htought as a federal law, all fuels had some ethanol content.....maybe i am wrong

 

Scientists were sure about global warming too.

 

When running Shell or Chevron premium fuel I noticed a difference in throttle response and mpg. I run both in my Matrix and Tacoma, but with my Matrix when I use cheap DOD gas I get about 24 mpg, but with shell I'm close to 30 mpg. I really dont drive my truck enough to know the difference in MPG but I'm sure it is higher with 91 octane

 

Please don't say that, because no they weren't. Scientists were ALWAYS conflicted over climate change, what it might mean, and what it might do.

POLITICIANS and the MEDIA perverted the science for their own ends.

Please do not give science an undeserved bad name.

 

All i am saying is scientists are human. humans make mistakes. They said coffee was bad for you, then good.... then bad again... now good again. If all gas was the same, they would have given up on different octanes a long time ago... most people would have caught on. When I use to run my 69 Camaro, I would put octane boost in and it made a huge difference. I DO notice a difference between 87 and 89... I dont care what scientists say. Cheers!

 

It would be more accurate to say science is fallible and not all research is perfect...which to be fair is what any real scientist will tell you, and that you should always be skeptical.

What it really tells us is that we as human beings need to educate ourselves and form our own opinions.

 

I tried running mid-grade and super-unleaded both in my truck with an open mind as I really wanted to see some improvement in gas mileage and if that would work, well then great! In my truck, did not yield any tangible benefits. I almost ended up in a head-on with a semi-trailer tractor rig on a two-lane road when trying to pass because I had done that same move many times before on regular unleaded and damn near got myself killed because my truck felt like it had an anchor out holding it back. Needless to say my experimenting with gasoline was over with. I stopped in the next town and put regular in it and that is what I use.

Can't say about anyone else's truck...if they are convinced THEIR TRUCK runs better on the mid or super, well then it works for them in their truck. It's all good.

 

Well it don't really work , but they spent the money so --it must work, I have spent the money - or it costs more so it must be better - big oil loves these folks.

Hey it is their money ..... they earned it , they can spend it as they choose

 

Y'all realize it takes 2-3 fills for the ECU to compensate for the change in octane hey?

 

like i asked in my question a few posts before, isnt that why you should disconnect the battery to clear the ecu's memory?

 

You crack me up man. I see you screaming about this all the time.

Firstly, Toyota themselves state in their technical information that the 1GR-FE engine has two different output ratings, one on 87 octane, and a second on 91 octane. This is due to the engine ECU adjusting valve timing (remember that whole VVT-i thing?) based on feedback from the knock sensors.

The people who built the engine, whom you do not know more than about said engine, have clearly stated that higher octane levels make a difference.

Second, many many people on this forum have calculated their mileage on multiple tanks of 87 and then calc'd on multiple tanks of 93. Many of these folks see improved mileage. The reason for the sometimes yes, sometimes no nature of the mileage gain is obvious - Toyota never mentioned anything about improved mileage with higher octane, just higher power output at the crank.

I understand what you're attempting to say, but until you come up with evidence more convincing than Toyota's own technical data and real world testing, I'm going to eschew your faith based approach in exchange for data from people who have actually tested dozens, if not hundreds, of these engines.

Enjoy your day.

 

Anyone who would make a blanket statement that higher octane fuel makes no difference in any car can't be taken seriously.

 

i must agree, in my turbo'd out mazda, with anything less than 91 s, it rain like shit,..some cars it makes a difference, our trucks, i am not qualified to, as regular seems to do the trick for me

 

I'm running 93 and notice a huge difference in power and performance. Then again, it is hopped up on methylcyclopentadienyl manganese tricarbonyl and a touch of slick 50.

 

I would guess that a lot of the high test users also think highly of this stuff also

 

I use the cheap stuff, works fine.