Switching from 87 to 91 Octane Gas - ClubLexus - Lexus Forum Discussion


IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Switching from 87 to 91 Octane Gas

Reply
 
 
 
Thread Tools Search this Thread
Old 01-30-17, 01:13 PM   #1
Zosopage
Driver School Candidate
Thread Starter
 
Join Date: Jan 2017
Location: California
Posts: 41
Thanks: 0
Thanked 1 Time in 1 Post
Default Switching from 87 to 91 Octane Gas

Delete Thread

Last edited by Zosopage; 02-10-17 at 09:41 AM.
Zosopage is offline   Reply With Quote
Old 01-30-17, 01:43 PM   #2
bazzle01
Driver
 
Join Date: Jan 2017
Location: Oztralia
Posts: 115
Thanked 5 Times in 5 Posts
Default

Wont do any harm.
After a few driving cycles the computer will slowly readjust timing etc.
bazzle01 is offline   Reply With Quote
Old 01-30-17, 07:43 PM   #3
istarzan
Lexus Test Driver
iTrader: (8)
 
istarzan's Avatar
 
Join Date: Jun 2011
Location: NC
Posts: 1,125
Thanked 4 Times in 4 Posts
Default

Its suppose to have gotten 93 octane since new....surprised there's been no problems putting in cheap gas. It's not a Camry.
istarzan is offline   Reply With Quote
Old 01-30-17, 07:56 PM   #4
HartFB
Driver School Candidate
 
HartFB's Avatar
 
Join Date: Jan 2017
Location: CA
Posts: 44
Thanked 2 Times in 2 Posts
Default

Like they said, you should have no issues. Gas is gas, octane just essentially means what temperature the explosion that causes combustion to occur occurs at. People that tell you 91 is "better" it's really not, all it does it combust at a different temperature which boosts its performance. 87 gas shouldn't have any negative effect due to the motor just accounting for the time of combustion.

That being said, I've always used the 91 because a few extra dollars doesn't kill the wallet and the extra preformace you get out of it is worth it imo.
HartFB is offline   Reply With Quote
Old 01-30-17, 09:29 PM   #5
Mrfix
Pole Position
 
Join Date: Sep 2016
Location: Texas
Posts: 262
Thanked 34 Times in 33 Posts
Default

Costco my Friend, Costco....Top Tier fuel, 5 times the required additives, 10-15 cents less a gallon.

The ECU on modern day cars is able to mess with the timing enough to make up for lower octane. The only difference is you won't make as much power because of it.
Mrfix is offline   Reply With Quote
Old 01-30-17, 11:10 PM   #6
Toxicxk23
Lead Lap
 
Join Date: Apr 2012
Location: CA
Posts: 677
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Mrfix View Post
Costco my Friend, Costco....Top Tier fuel, 5 times the required additives, 10-15 cents less a gallon.

The ECU on modern day cars is able to mess with the timing enough to make up for lower octane. The only difference is you won't make as much power because of it.
Why would he buy an IS350 only to put lower octane fuel in there to have less power...? Squeeze all the power out of the IS350 as you can! Go 91!
Toxicxk23 is offline   Reply With Quote
Old 01-31-17, 05:35 AM   #7
Viktimize
Driver
 
Join Date: Oct 2016
Location: Alberta
Posts: 166
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by HartFB View Post
Like they said, you should have no issues. Gas is gas, octane just essentially means what temperature the explosion that causes combustion to occur occurs at. People that tell you 91 is "better" it's really not, all it does it combust at a different temperature which boosts its performance. 87 gas shouldn't have any negative effect due to the motor just accounting for the time of combustion.

That being said, I've always used the 91 because a few extra dollars doesn't kill the wallet and the extra preformace you get out of it is worth it imo.

It's not just performance, it's gas mileage too. The car burns less gas to get the same power when it can advance the timing. So depending how you drive it might not actually even cost more to run premium.


Quote:
Originally Posted by istarzan View Post
Its suppose to have gotten 93 octane since new.....
Where did you read this? I have never heard of a car requiring 93, being that you cannot find it very many places. 91 is the standard recommended premium fuel for virtually every car manufacturer.

Last edited by Viktimize; 01-31-17 at 05:40 AM.
Viktimize is offline   Reply With Quote
Old 01-31-17, 05:37 AM   #8
Viktimize
Driver
 
Join Date: Oct 2016
Location: Alberta
Posts: 166
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by Mrfix View Post
Costco my Friend, Costco....Top Tier fuel, 5 times the required additives, 10-15 cents less a gallon.

Costco just buys their fuel from refineries like everyone else. Shell, Esso, Petro, etc. But when purchasing raw gasoline, they don't the maufactures additive pack. Are you saying Costco has their own additive pack they add locally at their stations? That would be news to me.
Viktimize is offline   Reply With Quote
Old 01-31-17, 06:34 AM   #9
istarzan
Lexus Test Driver
iTrader: (8)
 
istarzan's Avatar
 
Join Date: Jun 2011
Location: NC
Posts: 1,125
Thanked 4 Times in 4 Posts
Default

Quote:
Originally Posted by Viktimize View Post
It's not just performance, it's gas mileage too. The car burns less gas to get the same power when it can advance the timing. So depending how you drive it might not actually even cost more to run premium.




Where did you read this? I have never heard of a car requiring 93, being that you cannot find it very many places. 91 is the standard recommended premium fuel for virtually every car manufacturer.
Doesn't the manual say premium? Premium is 93 in NC, there there's 89 and 87.
istarzan is offline   Reply With Quote
Old 01-31-17, 06:48 AM   #10
Viktimize
Driver
 
Join Date: Oct 2016
Location: Alberta
Posts: 166
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by istarzan View Post
Doesn't the manual say premium? Premium is 93 in NC, there there's 89 and 87.

According to Lexus it is 91

http://lexus2.custhelp.com/app/answers/detail/a_id/8129/~/which-fuel-grade-should-i-use-for-my-lexus-vehicle%3F


I'm
guessing you just tend to get your fuel at a station that doesn't carry anything without Ethanol? Their premiums are always higher octane with that garbage in it. But any normal gasoline is 91 Octane for Premium.
Viktimize is offline   Reply With Quote
Old 01-31-17, 07:58 AM   #11
Trolling55
Driver School Candidate
iTrader: (1)
 
Join Date: Aug 2015
Location: CA
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Default

it depends where you're at. I'm in socal and 91 octane is my premium
Trolling55 is offline   Reply With Quote
Old 01-31-17, 08:30 AM   #12
flowrider
Lexus Fanatic
iTrader: (8)
 
flowrider's Avatar
 
Join Date: Nov 2008
Location: Arizona
Posts: 5,993
Thanked 122 Times in 107 Posts
Default

Quote:
Originally Posted by Viktimize View Post
But any normal gasoline is 91 Octane for Premium.
Not so! In Eastern part of the US Premium is 93 octane. It's 91 octane in the West

Lou
flowrider is online now   Reply With Quote
Old 01-31-17, 10:15 AM   #13
Viktimize
Driver
 
Join Date: Oct 2016
Location: Alberta
Posts: 166
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by flowrider View Post
Not so! In Eastern part of the US Premium is 93 octane. It's 91 octane in the West

Lou
They have 93 Octane all over the country, just not in every station. As mentioned 93 Octane is generally an Ethanol blended fuel though. I personally don't know of any refineries that specifically make a 93 Octane straight gasoline. Reason being is that government standard for premium fuel is 91 Octane, and oil companies aren't generally in the business of giving away free heavy ends. Most companies now offer a 93/94 Octane fuel by blending Ethanol, which gives free Octane basically as Ethanol is dirt cheap compared to gasoline components. However Ethanol does not deliver the same energy per liter as Gasoline, so it kills mileage.

I'm pretty well versed at my job. But I still learn things from time to time, there could possibly be some refinery making a 93 Octane full gasoline.
Viktimize is offline   Reply With Quote
Old 01-31-17, 11:18 AM   #14
flowrider
Lexus Fanatic
iTrader: (8)
 
flowrider's Avatar
 
Join Date: Nov 2008
Location: Arizona
Posts: 5,993
Thanked 122 Times in 107 Posts
Default

^^^^All gasoline currently sold is an Ethanol blended fuel. All the Fuel pumps that I have seen are labeled as containing not more than 10% ethanol, known as E10. And yes, 93 Octane is available all over, but in the west it's a speciality fuel, available at a limited number of stations. 91 Octane is the standard Premium. Not so in the East, there 93 Octane is the standard rating for Premium.

Lou
flowrider is online now   Reply With Quote
Old 01-31-17, 11:48 AM   #15
Viktimize
Driver
 
Join Date: Oct 2016
Location: Alberta
Posts: 166
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by flowrider View Post
^^^^All gasoline currently sold is an Ethanol blended fuel. All the Fuel pumps that I have seen are labeled as containing not more than 10% ethanol, known as E10. And yes, 93 Octane is available all over, but in the west it's a speciality fuel, available at a limited number of stations. 91 Octane is the standard Premium. Not so in the East, there 93 Octane is the standard rating for Premium.

Lou
Must be a crazy U.S. tree hugging thing. So where do people in the states get marine fuel? You have to go a special supplier for that instead of just filling up at the gas station?
Viktimize is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
93 vs 91 Octane peasodos GS - 4th Gen (2013-present) 18 08-29-17 06:36 AM
Will No Ethanol make a Difference DJWLDW LS - 4th Gen (2007-2017) 14 04-03-17 09:44 PM
2002 Lexus ES300 using 87 Octane Gas? youngim87 ES - 1st to 4th Gen (1990-2006) 81 01-06-17 07:30 PM
Wrong octane.. PersianOne LS - 3rd Gen (2001-2006) 11 04-08-16 08:43 PM
Accidently put 87 octane gas in my ISF...... idoke1 IS F (2008-2014) 32 03-11-16 04:09 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 09:24 AM.


Copyright © 2000-2017 Internet Brands, Inc. All Rights Reserved
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: