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Topic Review (Newest First)
04-27-2008 04:32 PM
Jerry Bransford
Quote:
Originally Posted by 2much View Post
I was told ( and haven't researche this, so I can not vouch for the validity) but when you buy a car new, run the cheap gas and you will not have any problems with it, but once you pump your first tank of higher octane gas, you will from then on need to either buy the higher octane or will have some issues being as you engine has become accustomed to the higher octane
That's a completely false rumor, there's not even a smidgen of truth in what you heard.
04-27-2008 01:50 PM
Triple88a Lol i've heard that for the RC gas cars but i dont think its true for other engines. All you have to do is disconnect the battery to clear ur computers memory.

That would be interesting to find if there are any facts supporting it.
04-27-2008 01:38 PM
2much I was in Mexico last year, and the prices were about the same to what they were in the states at the time.
On the octane issue, I run 87 in the jeep, and 93 in the BMW, I was told ( and haven't researche this, so I can not vouch for the validity) but when you buy a car new, run the cheap gas and you will not have any problems with it, but once you pump your first tank of higher octane gas, you will from then on need to either buy the higher octane or will have some issues being as you engine has become accustomed to the higher octane
04-27-2008 04:37 AM
Triple88a Now wouldnt it be nice if they step up like men and shoot at eachother and leave the civilians out of it lol. The other day. Some woman got shot in the chest because of couple bucks in her wallet. Couple days before that, some little girl got shot in a crossfire during a gang shooting. wtf.
04-26-2008 02:16 PM
Jerry Bransford Talking about how dangerous it is in the border area of Mexico, this just occurred in Tijuana, 15 drug gang members were just killed in a gun battle! Wow! I think it's going to be a while before we set foot in Mexico except maybe WAY south via a cruise ship or flight into somewhere like Cabo San Lucas at the very tip of Baja California.
http://news.yahoo.com/s/nm/20080426/...exico_drugs_dc
04-26-2008 09:03 AM
richp
Quote:
Originally Posted by Triple88a View Post
The problem is now they are starting to bring all that crap over here on American soil and our leaders are not doing anything.
Maybe it's part of bushes plan, invade and add a whole bunch more states to the flag...
04-26-2008 09:01 AM
richp
Quote:
Originally Posted by Jerry Bransford View Post
I dunno. I used to go across the border for cheap diesel when it was around .24 a gallon but that was years ago. The last time I was in Mexico I didn't notice the Pemex gas prices being all that cheap. I haven't driven into Mexico in several years though, it's too dangerous right now. There are kidnappings, Americans being shot, running gun battles between the cops/federales and drug dealers going on now so we're avoiding the Mexican border areas until things settle down again.
Dam, guess going over for the 'maria and her donkey' show might not be a good idea anymore...
04-25-2008 09:02 PM
Triple88a
Quote:
Originally Posted by Jerry Bransford View Post
There are kidnappings, Americans being shot, running gun battles between the cops/federales and drug dealers going on now so we're avoiding the Mexican border areas until things settle down again.
The problem is now they are starting to bring all that crap over here on American soil and our leaders are not doing anything.
04-25-2008 08:19 PM
Jerry Bransford
Quote:
Originally Posted by richp View Post
Hey jerry, hows the prices down in TJ on gas ? Is there still a line to get across there. Saw on the news the other nite about a trucking company that was running across in texas and filling their trucks with $2 diesel, the feds stopped them on the second trip when they brought back a 500 gallon tank on a trailer. That tells me the mexican govt is subsidizing their nafta truckers with cheap fuel.
I dunno. I used to go across the border for cheap diesel when it was around .24 a gallon but that was years ago. The last time I was in Mexico I didn't notice the Pemex gas prices being all that cheap. I haven't driven into Mexico in several years though, it's too dangerous right now. There are kidnappings, Americans being shot, running gun battles between the cops/federales and drug dealers going on now so we're avoiding the Mexican border areas until things settle down again.
04-25-2008 08:03 PM
Triple88a Lol in my opinion, crops to fuel will never make it big. Reason being is it takes too much crops to make fuel. (from the article) In 06, 17% of the crops produced only made 2% of ethanol. This means that such a big amount of crops were used that only made 2% of ethanol.
Imagine we want to make more ethanol? what happens then? More crops needed.

In the article they were saying that using sugar canes to make ethanol will most likely be the best choice since its more efficient.
04-25-2008 07:41 PM
richp
Quote:
Originally Posted by Triple88a View Post
i did not say if you up the compression.. i was strictly talking about energy in ethanol vs gasoline.
Ethanol can resist knocking much much better than octane can. From memory E85 compares to about 105 octane rating. (just did a research paper on alternative fuels 3 weeks ago for chemistry - any one want articles?)
What was your determination, fermentation process or cellulolosic being the better of the two methods.
04-25-2008 07:35 PM
Triple88a i did not say if you up the compression.. i was strictly talking about energy in ethanol vs gasoline.
Ethanol can resist knocking much much better than octane can. From memory E85 compares to about 105 octane rating. (just did a research paper on alternative fuels 3 weeks ago for chemistry - any one want articles?)
04-25-2008 07:35 PM
richp Hey jerry, hows the prices down in TJ on gas ? Is there still a line to get across there. Saw on the news the other nite about a trucking company that was running across in texas and filling their trucks with $2 diesel, the feds stopped them on the second trip when they brought back a 500 gallon tank on a trailer. That tells me the mexican govt is subsidizing their nafta truckers with cheap fuel.
04-25-2008 07:32 PM
richp
Quote:
Originally Posted by Triple88a View Post
Summer vs winter? Longer more continuous trips? Smooth accelerating?


2x,

Ethanol has ~60% of the energy standard gasoline has.
That last part is somewhat true, if you up the compression to 11 or 11.5:1 the ethanol will get better MPG than gas will in the lower compression engines. Have some people I know in Brazil that have jeeps with 4.0 export engines that are high compression from the factory, not available here by law. They report about 30MPG on those high compression XJ's they have.
04-25-2008 07:28 PM
Triple88a
Quote:
Originally Posted by wheelin352 View Post
I used to get maybe 180 miles per tank and since they started adding ethanol im get atleast 200 with no change to the jeep
Summer vs winter? Longer more continuous trips? Smooth accelerating?

Quote:
Originally Posted by Jerry Bransford View Post
The EPA says Ethanol will slightly reduce fuel economy, not improve it.
2x,

Ethanol has ~60% of the energy standard gasoline has.
04-25-2008 07:27 PM
richp Thats the strange part, back in 2001 I was working a contract in Fairfield NJ, about that time they dropped that MTB stuff and started using ethanol as the winter additive [for you warm climate types, cold states change to 'winter fuel' around Oct 1 till April 1]. I was commuting 61 miles each way, keeping very good track of my mileage for tax purposes so I kept a log. When the winter fuel hit I expected a 1-2mpg drop, got the exact opposite in the 4.0L 5 speed XJ. What I think happened is the ethanol cleaned the engine out, I was only adding Chevron Techron about every 4-5K miles but getting a full tank of winter gas every two days or so at the Sunoco in Fairfield. I actually got better mileage with the winter stuff. Now the other interesting part was when I filled up with Sunoco in Pa near home my mileage went back down, up in the pokes they did not switch to winter mix, that was only required in the big cities for cars that would spend excessive time idling in traffic so the boonies were exempt. No explanation only speculation, I have noticed that we tend to get more crap gas up here than down towards Allentown which has always convinced me that the suppliers may be slipping other stuff in there to make it go further, either way I don't trust them. Thats also one of the reasons I drag empty 5 gallon containers with me when I head to NJ, not only is it 25 cents cheaper per gallon I think it's better gas, NJ tends to be somewhat aggressive with their inspections and testing.
04-25-2008 05:55 PM
Jerry Bransford The EPA says Ethanol will slightly reduce fuel economy, not improve it.
04-25-2008 05:48 PM
wheelin352
Quote:
Originally Posted by NOLUCK13 View Post
the " cheap " 87 grade of gas just smells funny each time I fuel up, and no I don't go around huffing gas
what iv been told that funny smell is ethanol they are now adding to the gas i found that i get better mpg with the places that are adding 10% ethanol. i used to get maybe 180 miles per tank and since they started adding ethanol im get atleast 200 with no change to the jeep
04-25-2008 04:48 PM
[TheYJGuy]
Quote:
Originally Posted by MOz View Post
I don't normally take sides...
Then I guess it depends on the driver, but anytime I ran 87, my 4.2 would spit, sputter and die. I'd have to use octane boost to get anything out of 87 octane.

And on an unrelated note, I have several friends attending CCM
04-25-2008 02:08 PM
sailsurf7713 I run 89 and star-tron which has a very mild octane booster, reduces separation of ethanol and gasoline and also has fuel system and combustion chamber cleaning properties. I run 89 due to the fact that my old 3.9 Magnum, even after sea foam, consistently got 20 miles more per tank than it did on 87 and had a lower compression ratio than the 2.5. I'd say for the 2.5 and 4.0, 87-89 is quite optimal and anything higher is a big waste of money. I once got 93 for the price of 87 at a gas station cause they ran out of 87 and 89 and my 3.9 Magnum ran like complete shit.

Just my 2 cents.
04-25-2008 12:11 PM
MOz
Quote:
Originally Posted by The_YJGuy88 View Post
Higher octane DOES improve fuel economy. The higher the octane, the slower AND cleaner the burn. The slower the burn=less fuel consumption. The cleaner the burn=better and longer engine performance.

I only run 93 octane in ANY Jeep I'll ever own. I find that the higher octane keeps the carbs running a bit better as well.
I don't normally take sides...

However, Jerry's right YJ. I had a fluid dynamics professor at Morris County College explain this to me. Higher octane gas burns more efficiently....(leaving less un-burned fuel). Higher octane is required in engines that require higher performance...such as higher compression ratios and motors that have 3-4 valves per cyclinder. There are no hp gains in running a higher octane fuel.

Ever try running 87 octane in a V-8 motor with 12:1 compression???? It will ping all day long and you will damage the pistons and valves because of the unburned residues ....You need Hess 101 or Cam2....

The 4.0L is not a high compression motor and does not need 93. However, I will say, if your engine is pinging, running 93 (for a short term) will fix the immediate issue. However, this may not solve the problem in the long run. The gas station may be giving you gas that has a marginal or lower 87 rating. I had this exact issue with the local Exxon station by me...so now I go to Lukoil and have not had any issues running their 87.
04-25-2008 11:55 AM
MOz
Quote:
Originally Posted by richp View Post
If it is pinging with 87 it's because you have carbon build up in the cylinder head, this carbon gets hot and glows which in turn causes the gas to ignite early, when you run higher octane it has inhibitors that make it harder for that carbon or the spark plugs to ignite the mix. What you need to do is get the carbon out of the combustion chamber. There are several ways to do this, Chevron Techron FUEL SYSTEM CLEANER [Not fuel injection cleaner], Sea Foam poured thru the throttle body and left to soak or if you have the knack you can use water dribbled into the running throttle body. The water does a really good job, the engine turns it to steam which penetrates the carbon and expands within the carbon blowing the carbon out big time. What you have to be careful of is too much water which can warp the head pretty dam quick. That I know from personal experience on my moms 66 6 cylinder Mustang way back in 68, I warped the head, I sneezed while pouring
x2 - Pinging on 87 mean either bad gas or carbon build up. A can of injection cleaner and a different gas station cured my problems.
04-25-2008 10:49 AM
Jerry Bransford
Quote:
Originally Posted by The_YJGuy88 View Post
Higher octane DOES improve fuel economy. The higher the octane, the slower AND cleaner the burn.
I hate to be so blunt and I seldom am this blunt but that is complete baloney. More octane than the engine is designed for does not improve fuel economy, and higher octane fuel certainly does not burn cleaner or leave fewer deposits behind in an engine designed to run with a lower octane.
04-25-2008 01:35 AM
[TheYJGuy]
Quote:
Originally Posted by mud707 View Post
higher octane levels of gas are made for use in older vehicles or modified race engines. Octane does not improve mpg at all it helps eliminate knocks that older vehicles have and make them run smoother. So if you don't mind spending extra $$$ for no benefit buy the high price stuff. If not stick to what your owner's manual says.
Higher octane DOES improve fuel economy. The higher the octane, the slower AND cleaner the burn. The slower the burn=less fuel consumption. The cleaner the burn=better and longer engine performance.

I only run 93 octane in ANY Jeep I'll ever own. I find that the higher octane keeps the carbs running a bit better as well.
04-24-2008 08:25 PM
richp
Quote:
Originally Posted by chiro2736 View Post
I was running 87 when I bought the Jeep, It pinged like CRAZY!
Since then I fill up with 91 and the i6 no loger pings! But every vehicle is different!

-John
If it is pinging with 87 it's because you have carbon build up in the cylinder head, this carbon gets hot and glows which in turn causes the gas to ignite early, when you run higher octane it has inhibitors that make it harder for that carbon or the spark plugs to ignite the mix. What you need to do is get the carbon out of the combustion chamber. There are several ways to do this, Chevron Techron FUEL SYSTEM CLEANER [Not fuel injection cleaner], Sea Foam poured thru the throttle body and left to soak or if you have the knack you can use water dribbled into the running throttle body. The water does a really good job, the engine turns it to steam which penetrates the carbon and expands within the carbon blowing the carbon out big time. What you have to be careful of is too much water which can warp the head pretty dam quick. That I know from personal experience on my moms 66 6 cylinder Mustang way back in 68, I warped the head, I sneezed while pouring
04-24-2008 08:02 PM
chiro2736 I was running 87 when I bought the Jeep, It pinged like CRAZY!
Since then I fill up with 91 and the i6 no loger pings! But every vehicle is different!

-John
10-27-2006 08:22 PM
pismo61 I also heard Chevron put more techron in the 92-3 octane.As stated the higher octane will do nothing for power in our Jeeps.
10-26-2006 12:55 AM
Jerry Bransford
Quote:
Originally Posted by 1BLKJP
Jerry, I think that what some of them are saying is that if you are running a vehicle that the fuel system has been somewhat neglected and you run a higher octange fuel for a couple of tanks, it can in fact increase the effeciency of said vehicle by providing the cleaning agents that haven't been there.
But where they'd be wrong is on the false rumor that higher octane gasolines of today's major brand gasolines have more cleaning additives than, say, 87 octane does. 87 has the same amount of fuel injection cleaning additives as 91 octane does, at least as far as the major brands go.
10-24-2006 02:41 PM
ezjeeper I guess I am unique. They do not have Octane 87 here. I run 86.5 usually. That's the "regular" gasoline level in Europe. My Jeep does ping sometimes, then I throw some higher octane in it to clean it up. Mid-grade is 90 and high is 93.
10-23-2006 07:30 PM
1BLKJP Jerry, I think that what some of them are saying is that if you are running a vehicle that the fuel system has been somewhat neglected and you run a higher octange fuel for a couple of tanks, it can in fact increase the effeciency of said vehicle by providing the cleaning agents that haven't been there.
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