LSC15's 95 Tacoma 4x4

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Gas Octane

View Poll Results: Which fuel octane do you use?
87 2,140 64.73%
89 445 13.46%
91 757 22.90%
Other fuel additives 55 1.66%
Multiple Choice Poll. Voters: 3306. You may not vote on this poll

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Old 04-22-2013, 12:14 AM   #881
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At this elevation (6000'+) I ran 85 loaf and jug gas (cheap stuff) and it started knocking when I got on it, so now I only use Shell 91 or chevron 91 (usually cause I fill up in Flagstaff on my way to cali). I hate knocking!

In San Diego (before I came here to colorado) I used to run just 87.

Even though this is kinda backward from what is supposed to happen: My truck is pickier in higher elevation then at sea level and it gets the best mileage with 91 vs. 85 or 89.
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Old 04-22-2013, 05:56 AM   #882
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Just swapped the Taco for a Tundra Crewmax Platinum, so I'm obviously too stupid to worry about mileage, but I thought this would be a useful bit of data for the conversation.

My Tacoma ran exclusively on ethanol-free premium. Over just short of 40,000 miles in the three years I used the Road Trip app, it averaged 19.5 miles to the US gallon (better in summer, worse in winter).

FWIW. Enjoy your trucks, lads.
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Old 04-25-2013, 12:54 PM   #883
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87 for the Taco
91 for the Gixxer 750
94 for the Turbo Miata

In all cases the lowest octane that results in no detonation. Knocking is the sound of parts in your engine trying to get out.
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Old 04-25-2013, 01:03 PM   #884
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premium all day
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Old 05-06-2013, 04:48 PM   #885
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No difference in mpg between 91 & 87 observed here.
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Old 05-06-2013, 07:19 PM   #886
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Non ethanol 91
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Old 05-06-2013, 08:07 PM   #887
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im one of the few running 89. its the reasonable compromise between 87 and 91.
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Old 05-06-2013, 10:27 PM   #888
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Anything above 87 is a waste unless you have the supercharger, or you raised your compression somehow. High octane is for high compression engines. Your owners manual wouldn't lead you wrong. Though you're not hurting anything by running a higher octane either, so if you have money to burn (pun intended) have at it.
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Old 05-07-2013, 04:26 AM   #889
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I work at 3800 ft, live at exactly 6000 ft. All out gas stations are 86/88/91. All the science says you are supposed to need less octane at higher elevations...but my baby just don't like the 86. I run 88 in town and average 17 high, mid 18s. I run premium on long road trips as the speed limit out here is 75 and I average just over 21 (barely high 19s on 88).
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Old 05-07-2013, 04:30 AM   #890
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i run 91/93, i think its best for my truck and it responds well with it. i put race gas in a few times just to see if it did anything and did see an increase in mileage but it wasnt worth the extra money spent.
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Old 05-07-2013, 04:53 PM   #891
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gas

I run regular(87) in winter and premium(91) in summer. If I run regular in summer, I get "rattling" slight predetonation on level, no acceleration driving. Weird, I know With everything being computerized, they cannot adjust anything anymore
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Old 05-07-2013, 07:39 PM   #892
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I run Shell V-Power 93 exclusively. It makes me feel better and as long as I can afford it I'll keep doing it. It might not make a "huge" difference but it isn't going to hurt the engine.

Didn't read the entire thread so if this was posted before I apologize in advance.

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Old 05-07-2013, 08:33 PM   #893
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Quote:
Originally Posted by kingston73 View Post
You can't just make a blanket statement like that, 91 octane can have ethanol in it just like any other octane, ethanol and octane arent' related at all.
He probably lives somewhere like I do, vancouver BC. I typically go to chevron. The lower octanes are grouped togethor, that states up to 10 ethanol right beside the handle. Then 91 is by itself and ses no ethanol.

I ran the first 14,000km of my truck on 87 with 10% ethanol. After reading this thread I`m goona switch to the 91 ethanol free and see what it does.
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Old 05-08-2013, 04:00 AM   #894
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Quote:
Originally Posted by DannyD View Post
He probably lives somewhere like I do, vancouver BC. I typically go to chevron. The lower octanes are grouped togethor, that states up to 10 ethanol right beside the handle. Then 91 is by itself and ses no ethanol.

I ran the first 14,000km of my truck on 87 with 10% ethanol. After reading this thread I`m goona switch to the 91 ethanol free and see what it does.
Just make sure you really do have ethanol free 91 before you pay for it. The octane rating and ethanol content have zero to do with each other.
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Old 05-08-2013, 04:20 AM   #895
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Ethanol does bad things to gas lines on older cars....and now they are trying to up the percentage from 10% to 15%...

If you were to run on pure ethanol, you gas mileage would plummet...so, now they are going to force 15% stuff on us, meaning LESS mpg...somehow this all doesn't make any sense except for corn farmers...

Bleh..

I run the 87 stuff most of the time, higher octane at higher elevations though...
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Old 05-08-2013, 08:20 PM   #896
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Quote:
Originally Posted by bldegle2 View Post
Ethanol does bad things to gas lines on older cars....and now they are trying to up the percentage from 10% to 15%...

If you were to run on pure ethanol, you gas mileage would plummet...so, now they are going to force 15% stuff on us, meaning LESS mpg...somehow this all doesn't make any sense except for corn farmers...

Bleh..

I run the 87 stuff most of the time, higher octane at higher elevations though...
+1 this is why in FL have Non-Ethanol stations down here for boats. It reeks havoc on boats down here.
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Old 05-12-2013, 12:14 PM   #897
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93 is the only gas I've ever put in it. Dont know how other octanes perform.
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Old 05-12-2013, 01:09 PM   #898
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89 is all I use in any of my vehicles. Happy medium between cheap and premium.
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Old 05-12-2013, 01:33 PM   #899
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Quote:
Originally Posted by oldstick View Post
It might be my imagination but seems like I can feel a very slight improvement in the smoothness during acceleration when I put the occaisional 89 or higher in the tank on my 07 V6. Can't prove it though.
Page 395 of 2006 owner's manual:
http://www.toyota.com/t3Portal/docum...html?locale=en

Quote:
For improved vehicle performance, the use of premium unleaded gasoline with an Octane Rating of 91 (Research Octane Number 96) or higher is recommended.
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Old 05-12-2013, 02:12 PM   #900
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My truck pings on accel when air conditioning is on when running 87 or 89, went to 91, all better.....will always run 91 in this truck now......
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