can i use 87 octane in my tII?
10-20-04, 06:24 PM
#1
Senior Member
Thread Starter
Join Date: Nov 2003
Location: Coquitlam BC Canada
Posts: 319
Likes: 0
Received 0 Likes
on
0 Posts
can i use 87 octane in my tII?
I always use 94 but for emissions I've been told that it helps to run lower octanes. I was wonderin if i put in like 5 bucks 87 octane and 3 bottles of alcohol just for the drive to emissions testing... then when i finish i'll immediately fill up with 94 octane... will my car be alrite? Also what kind of alcohol do you put in? vodka :P jk
matt
thanks
matt
thanks
10-20-04, 06:26 PM
#2
Full Member
Join Date: Jul 2001
Location: Lavonia, GA
Posts: 249
Likes: 0
Received 0 Likes
on
0 Posts
I wouldn't even try 87. 91 MAYBE. If you stay out of boost...as in NEVER getting into boost? Then yes...but its a VERY good possibility of blowing an engine if you go full boost...even just once.
10-20-04, 06:29 PM
#4
Zoom Zoom Boom!
Join Date: Mar 2003
Location: San Francisco, CA
Posts: 2,312
Likes: 0
Received 0 Likes
on
0 Posts
I heard 87 is fine and recommended in the owners manual for the S4 TII's. I have no idea about the S5 TII's. Perfectly fine on a stock car. I ran 91 octane on my modded TII though.
10-20-04, 06:31 PM
#5
Rotary Enthusiast
Join Date: May 2002
Location: Boston
Posts: 1,203
Likes: 0
Received 0 Likes
on
0 Posts
Nope, Rx7's that are turbo charged (or for that matter any car that is turbo charged) needs to use a minimum of 91 octane due to there high compression ratio. The higher the octane rating the higher it can withstand pinging.
Although if you plan to use a lower octane for a very temporary purpose and dont go into boost AT ALL youll be fine.
Although if you plan to use a lower octane for a very temporary purpose and dont go into boost AT ALL youll be fine.
10-20-04, 06:42 PM
#7
lol..... everyone says ...."you might be alright"..... ive been driving my car for almost a year @ 10 lbs. of boost.... WITH 87 OCTANE , sometimes 89...... but rarily! and she still drives great.... no problems at all w/ drivability ! still pulls like a son-of-a-bitch.... so, i dont believe it hurts anything!!
Trending Topics
10-20-04, 07:30 PM
#15
90 Turbo
Join Date: Jun 2004
Location: Cookeville TN
Posts: 272
Likes: 0
Received 0 Likes
on
0 Posts
I ran 91 in my 87 n/a the first year I bought it and it always hesitated between 3 and 4 thousand rpms . I saw a thread in the history saying to use 87 I tried it and it hasn't hesitated since then .
10-20-04, 07:40 PM
#18
90 Turbo
Join Date: Jun 2004
Location: Cookeville TN
Posts: 272
Likes: 0
Received 0 Likes
on
0 Posts
I have read some pretty good arguments in the history that in rotory engines no matter what it was 87 was the better grade because the easier detonation of 87 causes you to get more hp because 91 went off so far on the end of the rotation that you lost alot of push .
10-20-04, 07:41 PM
#19
...94% correct.
Higher octane is to aid with boost. It's a performance thing. It's the equivelant of dumping more fuel in....but with less fuel...ummm...yeah....
What model N/A do you have nfs05? Mine said to use 87 (GTU)...
What model N/A do you have nfs05? Mine said to use 87 (GTU)...
10-20-04, 07:44 PM
#20
Define 'Cynical'
Join Date: Sep 2004
Location: Sammamish, WA
Posts: 562
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by nfs05
s5 run higher octane for some reason... my 89 n/a says to run 91. s4 were designed for 87 turbo or n/a
10-20-04, 07:46 PM
#22
90 Turbo
Join Date: Jun 2004
Location: Cookeville TN
Posts: 272
Likes: 0
Received 0 Likes
on
0 Posts
in high compression engines if you run 87 on the compression stroke it will explode or detonate before the spark throwing the engine out of time so to speak also known as dieseling
10-20-04, 07:50 PM
#24
Define 'Cynical'
Join Date: Sep 2004
Location: Sammamish, WA
Posts: 562
Likes: 0
Received 0 Likes
on
0 Posts
The Series 5 N/A has a much higher compression ratio than it's turbo counterpart and it's strongly advised to use only 87 octane in a N/A engine. As far as turbos go, I've only heard of/seen people use 91 in them.