Gas for 84 CJ 7 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Gas for 84 CJ 7

Official Chassis Saver Rust Preventive Truck & Auto UnRough Country Lift Kits and Parts!1999-2004 Jeep Grand Cherokee Limited Headlight Pair

Reply
Unread 07-11-2013, 08:23 AM   #1
KTGator
Registered User
1984 CJ7 
 
Join Date: May 2013
Location: Boca raton, FL
Posts: 29
Gas for 84 CJ 7

I was told when I picked up my Jeep that I should use premium gas..Does anyone else do this? @ 4.09 it hursts a little..

KTGator is offline   Reply With Quote
Unread 07-11-2013, 08:27 AM   #2
Chewtoy
Registered User
1976 CJ5 
 
Join Date: Jul 2009
Location: Meridian, Idaho
Posts: 859
not unless you have some sort of high compression monster motor. Regular is just fine.
__________________
With a great Jeep comes an empty wallet.
Chewtoy is offline   Reply With Quote
Unread 07-11-2013, 08:30 AM   #3
texas1al
Registered User
1984 CJ7 
 
Join Date: Mar 2013
Location: Arlington, VA
Posts: 61
I find that my worn 258 runs a lot better on higher octane gas, but I've never run 91 premium. I switched from regular 87 to mid-grade 89 a couple years ago and it cured some knocking I had at load. I tuned the carb and timing for years, but could never completely eliminate the knock until I upgraded to 89 octane.
texas1al is offline   Reply With Quote
Unread 07-11-2013, 08:31 AM   #4
WindKnot
Web Wheeler
 
WindKnot's Avatar
1977 CJ7 
 
Join Date: Mar 2011
Location: , Northern Arizona
Posts: 2,380
I use at least mid grade. and it does hurt. It also gets rid of the pinging. My engine isn't stock though anymore either.
__________________
Be kind. If for no other reason, it will confuse the daylights out of people and make them wonder what you're up to. And ALWAYS drink upstream of the herd!
WindKnot is offline   Reply With Quote
Unread 07-11-2013, 08:59 AM   #5
bradleybrb
Member
 
bradleybrb's Avatar
1975 CJ5 
 
Join Date: Jan 2013
Location: , MS
Posts: 409
We have one station here that sells ethanol free gas. It's only 87 octane, but my jeep runs as good or better on it than it does premium.
bradleybrb is offline   Reply With Quote
Unread 07-11-2013, 10:43 AM   #6
scrapman
Registered User
1984 CJ7 
 
Join Date: Apr 2010
Location: Tyler, TX
Posts: 698
The ONLY reason to go up in grades of gasoline is if you can not get your engine to quit pinging (detonating) on the grade you are using. If your engine runs fine (without pinging) on regular grade, it will not run any better on the higher grades.
scrapman is online now   Reply With Quote
Unread 07-11-2013, 11:15 AM   #7
texas1al
Registered User
1984 CJ7 
 
Join Date: Mar 2013
Location: Arlington, VA
Posts: 61
Yeah, I was going to add that I have to use "city gas" with 10% ethanol unless I want to drive 50 miles to get pure "country gas" with no ethanol. Not sure if that makes a difference at the same octane rating.
texas1al is offline   Reply With Quote
Unread 07-11-2013, 11:17 AM   #8
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 3,767
I run prem in mine, and always have.
LG
LumpyGrits is offline   Reply With Quote
Unread 07-11-2013, 11:31 AM   #9
82JeepCJ7
Registered User
1982 CJ7 
 
Join Date: Jun 2010
Location: Marysville, WA
Posts: 4,658
I run the cheapest non-ethanol fuel I can buy.
__________________
Beat it to fit, paint it to match!

Wheel, Wrench, Repeat.
82JeepCJ7 is offline   Reply With Quote
Unread 07-11-2013, 11:49 AM   #10
wellmax
Registered User
1984 CJ7 
 
Join Date: Nov 2008
Location: Hazel, KY
Posts: 1,045
I always fill my old jeep up with non-ethanol when I make a gas run for all my other small gas engines,
lawn mower, tiller, chainsaw, old tractor, etc:

the old jeep runs fine and starts good on non-ethanol gas.

just hope the government stays out of the local gas business and continues to allow the stations to sell non-ethanol gas.
wellmax is offline   Reply With Quote
Unread 07-11-2013, 01:01 PM   #11
KTGator
Registered User
1984 CJ7 
 
Join Date: May 2013
Location: Boca raton, FL
Posts: 29
THANKS for all the feedback..This was a big help....
KTGator is offline   Reply With Quote
Unread 07-11-2013, 04:19 PM   #12
brownbagg
Registered User
1930 MK Compass 
 
Join Date: Feb 2010
Location: pearl, la
Posts: 2,453
i feel my jeep with what ever gas around, even used outboard gas, if the motor pinging, its not adjusted right. they very few cars on the road today that needs the high dollar ****
brownbagg is offline   Reply With Quote
Unread 07-11-2013, 04:26 PM   #13
lucdog
Web Wheeler
 
lucdog's Avatar
1980 CJ5 
 
Join Date: Jul 2006
Location: , Il.
Posts: 7,761
Quote:
Originally Posted by scrapman
The ONLY reason to go up in grades of gasoline is if you can not get your engine to quit pinging (detonating) on the grade you are using. If your engine runs fine (without pinging) on regular grade, it will not run any better on the higher grades.
This^^^
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is offline   Reply With Quote
Unread 07-11-2013, 04:44 PM   #14
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 4,504
I run 89 octane as I can notice the difference over 87. My engine is also 30 over on the pistons and the head and block were decked as well so the compression is up a little over stock configuration.

I tried 91 octane a few times but their is no difference between using 89, so 89 it is for me.
__________________
.
1984 CJ-7 Renegade
__________________

Restoration Thread:http://www.jeepsunlimited.com/forums...d.php?t=434226
keith460 is offline   Reply With Quote
Unread 07-11-2013, 09:51 PM   #15
lucdog
Web Wheeler
 
lucdog's Avatar
1980 CJ5 
 
Join Date: Jul 2006
Location: , Il.
Posts: 7,761
Quote:
Originally Posted by keith460
I run 89 octane as I can notice the difference over 87. My engine is also 30 over on the pistons and the head and block were decked as well so the compression is up a little over stock configuration.

I tried 91 octane a few times but their is no difference between using 89, so 89 it is for me.
I think one would find this is true, the higher the compression, the higher the octane needed.
The GTP Pontiac we had with the supercharged 3.8 V6 required 91 octane. As well as the Buick Gran National with the turbo charged 3.8 ( didn't have one, a friend did)

Bill
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.