New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

87 octane?

Old 09-12-08, 02:15 PM
  #26  
Full Member
10 Year Member
 
camman's Avatar
 
Join Date: Dec 2005
Location: utah
Posts: 189
Likes: 0
Received 0 Likes on 0 Posts
Like several knowledgeable people have said Mazda recommends 87 octane. unless you are boosting more than stock you will have reduced engine performance on higher octane fuel! You can run a higher octane rating fuel if you are worried your engine has carbon buildup, thus having hot spots, creating detonation.
camman is offline  
Old 09-12-08, 03:54 PM
  #27  
Who Shot the Sheriff?
5 Year Member
iTrader: (2)
 
Turbo II Rotor's Avatar
 
Join Date: Jan 2007
Location: Aurora, CO
Posts: 3,860
Likes: 0
Received 0 Likes on 0 Posts
Mazda designed the car to run on 87. But I guess all you kids who have been here for a month are smarter than Mazda right?

Turbo II Rotor is offline  
Old 09-13-08, 01:50 PM
  #28  
Junior Member
5 Year Member
 
Join Date: Sep 2008
Location: Hereford
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Thumbs down

Most of you obviously live in the US. You fill up with premium instead of 87 over here and its a good $10-15 more every tank without fail!
Eclipsed4ever is offline  
Old 09-13-08, 02:05 PM
  #29  
Finally, BRAP BRAP!!!!
5 Year Member
iTrader: (2)
 
dre's customs's Avatar
 
Join Date: Apr 2008
Location: charlotte, NC
Posts: 590
Likes: 0
Received 0 Likes on 0 Posts
hold on now buddy, I have been around rx7 for a long time, and i know what adversed affects of a T2 that was ran on regular BONE STOCK for the course of its 62000 miles of life was. its called detonation. before you smart off and get an attitude, take you engine apart and look at it. maybe the car was designed to run on 87, i have a tech sheet that speakes diffrent. you tell me, mazda of yester years or todays mazda. alot has changed and to call someone a liar that you dont even know, that thats ***** buddie. this is exactlly why it took me so long to to join this fourum is because i know theres allways arguments. Its rather funny how some people can that a discussion and turn it into a pissing contest. Im done

Last edited by dre's customs; 09-13-08 at 02:13 PM. Reason: adding
dre's customs is offline  
Old 09-13-08, 02:20 PM
  #30  
Who Shot the Sheriff?
5 Year Member
iTrader: (2)
 
Turbo II Rotor's Avatar
 
Join Date: Jan 2007
Location: Aurora, CO
Posts: 3,860
Likes: 0
Received 0 Likes on 0 Posts
I'm sorry, you're right. Mazda had sooooo much more to gain by saying the car would run on regular rather than premium. Maybe you should post your tech sheet instead of just claiming you have one. Also while you're at it would you please explain to the rest of the people running on regular how their engine defies the laws of physics. Thousands of people have run on regular and their engines lasted 125k+.
Turbo II Rotor is offline  
Old 09-13-08, 08:52 PM
  #31  
StreetNologerx7
 
streetnologerx7's Avatar
 
Join Date: Sep 2008
Location: Lake Havasu City AZ
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
91 or better

I only run 91 in my car with a little two stoke oil
streetnologerx7 is offline  
Old 09-13-08, 09:35 PM
  #32  
Who Shot the Sheriff?
5 Year Member
iTrader: (2)
 
Turbo II Rotor's Avatar
 
Join Date: Jan 2007
Location: Aurora, CO
Posts: 3,860
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by streetnologerx7 View Post
I only run 91 in my car with a little two stoke oil
I only run c-116 in my na, everyone tells me it's overkill but I figure I should do it for the detention resistance right?

Turbo II Rotor is offline  
Old 09-13-08, 09:41 PM
  #33  
StreetNologerx7
 
streetnologerx7's Avatar
 
Join Date: Sep 2008
Location: Lake Havasu City AZ
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
???

how much better does it run with that
streetnologerx7 is offline  
Old 09-14-08, 12:53 AM
  #34  
Re-Mama Mia!
iTrader: (2)
 
younG_Gunner's Avatar
 
Join Date: Jun 2004
Location: NorCal
Posts: 1,080
Received 0 Likes on 0 Posts
Wow.



This thread made me LOL!!
younG_Gunner is offline  
Old 09-14-08, 09:46 PM
  #35  
Right-Wing Extremist Vet
5 Year Member
iTrader: (-1)
 
Archie's Avatar
 
Join Date: Aug 2007
Location: Ann Arbor, Dirty Glove
Posts: 2,938
Likes: 0
Received 0 Likes on 0 Posts
*ahem*

Let's start from the beginning my young n00blets:

I assume that you all know what octane is and what the rating is for. If not, please utilize that fine search option at the top right hand of your screen, or simply use google.

A rotary engine prefers a quicker burning fuel. NA engines will actually run better and possibly achieve better mileage with 87 octane. A stock TII owner's manual IIRC, says to utilize 87 octane. HOWEVER: Know that most of these cars are modified and as such, fuel amount and octane should be adjusted accordingly. Lastly, if you don't know what you are talking about, please refrain from spreading ill-informed opinions, conjecture, and hear-say. This is a new member section and people come here to learn facts. Not "my friend" or "I heard", just facts.
Archie is offline  
Old 09-14-08, 10:57 PM
  #36  
I Dislike Everything
 
rowtareh?'s Avatar
 
Join Date: Apr 2002
Location: St. Louis/Southern Illinois
Posts: 3,642
Likes: 0
Received 1 Like on 1 Post
Yes, it is fine to run on 87 if it's a stock S4. 91 or 93 is recommended on S5's. Enough of this.
rowtareh? is offline  
Old 02-24-16, 02:19 PM
  #37  
Junior Member
 
Join Date: Feb 2016
Location: Sugar Land
Posts: 20
Likes: 0
Received 0 Likes on 0 Posts
Lightbulb

Originally Posted by dre's customs View Post
thats not what the owners manual says. lol it says 87 octane for the N/A and pemiumfor the T2. even the car has a sticker on it that says pemium only.


Same here I read the owners manual


ive been using premium doesn't seem to like it, I have s4 I'm about to revert to 87 or 89 which ever I find lowest on the pump


ill message back with the results
Mia88 is offline  
Old 02-24-16, 08:22 PM
  #38  
Rotorhead
 
Evil Aviator's Avatar
 
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 21 Likes on 16 Posts
Originally Posted by Mia88 View Post
ive been using premium doesn't seem to like it, I have s4 I'm about to revert to 87 or 89 which ever I find lowest on the pump
If the engine is not running well on premium fuel, then there is either something wrong with the engine or with the fuel. If it is the engine, then lower octane fuel may make the problem worse and even cause major damage. What exactly do you mean by "doesn't seem to like it"?

Originally Posted by Mia88 View Post
ill message back with the results
OK, just find another 8 year old thread and attach your results to it.
Evil Aviator is offline  
Old 03-02-16, 07:48 PM
  #39  
Full Member
 
Join Date: Dec 2015
Location: Thessaloniki
Posts: 101
Likes: 0
Received 3 Likes on 3 Posts
If you have hints of detonation then go for the premium, if not then 87 it is.
Just be carefull, d3tonation is not always easy to hear-spot.
AlienHack is offline  
Old 03-02-16, 07:53 PM
  #40  
Junior Member
iTrader: (1)
 
Join Date: Mar 2016
Location: cleveland, ohio
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
I would agree that 87 with no detonation would be just fine.
ktmryan53 is offline  
Old 03-04-16, 10:01 AM
  #41  
Junior Member
 
Join Date: Feb 2016
Location: Sugar Land
Posts: 20
Likes: 0
Received 0 Likes on 0 Posts
All turbo engines require premium fuel 91 or higher to run to there optimum performance
as well as using full synthetic oil
Mia88 is offline  
Old 03-04-16, 06:43 PM
  #42  
Rotorhead
 
Evil Aviator's Avatar
 
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 21 Likes on 16 Posts
Originally Posted by Mia88 View Post
All turbo engines require premium fuel 91 or higher to run to there optimum performance
as well as using full synthetic oil
Its amazing how these myths continue even in the age of the internet where it is easy to find the correct information.
Evil Aviator is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
alphawolff
1st Generation Specific (1979-1985)
17
11-17-15 05:57 PM
Snook
Single Turbo RX-7's
39
10-04-15 08:47 PM
Shainiac
Single Turbo RX-7's
9
09-21-15 05:02 PM
rx7brandon
General Rotary Tech Support
3
08-16-15 10:55 AM


Thread Tools
Search this Thread
Quick Reply: 87 octane?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: