View Poll Results: Stay with Supreme Unleaded with gasoline prices so high?
Yes
367
89.29%
No
44
10.71%
Voters: 411. You may not vote on this poll
For you that use 93+ octane fuel...
06-13-2005, 11:16 PM
#81
Senior Member
Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by the_3d_man
I have a thought for you all... When i first got my car back in February I ran 87 octane. Probably for 6 or 7 full tanks. I averaged between 320 and 330 miles per tank. I then switched to 93 octane just to give it a try and have been running it ever since, because I now get between 380 and 400 miles per tank. I figured out the number of miles per dollar i was getting at both. For 87 octane i was getting like 9.5 miles per dollar and with 93 octane i was getting 10.5. (assuming the cost of 93 octane was 20 cents more than 87)
06-14-2005, 05:52 AM
#83
Senior Member
Join Date: May 2004
Posts: 6,190
Originally Posted by the_3d_man
I have a thought for you all... When i first got my car back in February I ran 87 octane. Probably for 6 or 7 full tanks. I averaged between 320 and 330 miles per tank. I then switched to 93 octane just to give it a try and have been running it ever since, because I now get between 380 and 400 miles per tank. I figured out the number of miles per dollar i was getting at both. For 87 octane i was getting like 9.5 miles per dollar and with 93 octane i was getting 10.5. (assuming the cost of 93 octane was 20 cents more than 87)
There you have it.
There you have it.
Consequently, I don't have much faith in your calculations. Sorry to rain on your parade.
06-14-2005, 10:20 AM
#84
Originally Posted by FriscoMax
I was prompted to start this thread because of the rising fuel prices. Until recently, I didn't pay much mind to the cost of a fill up. It was somewhere in the high $20's, low $30's range to fill up Monty Max. Today, it took almost $40 to give him the good, high octane fuel he deserves. Any of you considering sacrificing performace for the extra greenbacks in your wallet?
06-14-2005, 10:44 AM
#85
Senior Member
Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by rmurdoch
I'm not sure if they use "winter" gas where you live, but my mpg has gone up by about 10% as a result of the warmer weather and no winter gas which was phased out in early April. Consequently, I don't have much faith in your calculations. Sorry to rain on your parade.
06-14-2005, 01:01 PM
#86
What's the price difference per gallon between 89 and 93...like 10 cents?
When you figure it all out, a tankful of premium is about $2 more than mid-grade. What else can you get for 2 bucks that performs as well?
When you figure it all out, a tankful of premium is about $2 more than mid-grade. What else can you get for 2 bucks that performs as well?
06-17-2005, 11:10 AM
#87
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Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by dr-rjp
What's the price difference per gallon between 89 and 93...like 10 cents? When you figure it all out, a tankful of premium is about $2 more than mid-grade. What else can you get for 2 bucks that performs as well?
I do agree that if you have your Max at the track, you would be dumb not to use premium gasoline. I don't do that, and so see no performance difference -- and no reason to drop $2 in my tank for no difference.
06-17-2005, 04:52 PM
#88
out of topic, heard that 87 0r 89 gas will clog fuel filter for 95-99 max which cause check engine light will lid, happen to my 98max, any of u? I stick with 93 now for my 98 & 00 max no matter how expensive.
06-17-2005, 05:23 PM
#90
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Join Date: May 2004
Posts: 6,190
Originally Posted by SilverMax_04
Some of us have tried and noticed no difference in performance. Why pay $2 for no difference in performance?
I do agree that if you have your Max at the track, you would be dumb not to use premium gasoline. I don't do that, and so see no performance difference -- and no reason to drop $2 in my tank for no difference.
I do agree that if you have your Max at the track, you would be dumb not to use premium gasoline. I don't do that, and so see no performance difference -- and no reason to drop $2 in my tank for no difference.
06-17-2005, 07:14 PM
#92
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Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by 98&00Max
out of topic, heard that 87 0r 89 gas will clog fuel filter for 95-99 max which cause check engine light will lid, happen to my 98max, any of u?
07-08-2005, 08:11 AM
#93
its $$2.639 for the super 93 here. The funny thing is anytime i use 89 oct i get better gas milage, im guessing its degressing the timing for the pinging. Ive been doing 10 gallons 93 and the rest 87. It runs good and saves a bit, at least im hoping. 
07-11-2005, 04:31 PM
#95
Originally Posted by MaxGordon7
its $$2.639 for the super 93 here. The funny thing is anytime i use 89 oct i get better gas milage, im guessing its degressing the timing for the pinging. Ive been doing 10 gallons 93 and the rest 87. It runs good and saves a bit, at least im hoping.
07-15-2005, 01:09 PM
#98
I really see no cost advantage to running midgrade (aka 89 octane), even if it could be used. Mixing equal parts of 93 & 87 will get you there, but in both cases, the savings is 10 cents per gallon (maybe 15 cents in some places).
Let's say you fill your tank every week with 18 gallons of 93 octane. That's an extra $1.80 per week. What else can you buy for $1.80 per week that can do so much? A Sunday newspaper?
Heck...that's like a savings of 3/4 gallon of gas per week, or a 4 percent savings.
IMHO, you can get same savings of 4 percent per week in gas just by slightly changing your driving habits.
Let's say you fill your tank every week with 18 gallons of 93 octane. That's an extra $1.80 per week. What else can you buy for $1.80 per week that can do so much? A Sunday newspaper?
Heck...that's like a savings of 3/4 gallon of gas per week, or a 4 percent savings.
IMHO, you can get same savings of 4 percent per week in gas just by slightly changing your driving habits.
07-28-2005, 04:25 PM
#101
Banned
Join Date: Feb 2005
Posts: 4,269
93 Is going up again here....Saw it as high as $2.61 at a Mobil
I paid $2.48 a couple days ago at Sunoco, thats where I find the best prices lately. (Even ran into a FREE gas bonanza there a month ago and got $20 of 93! Special thanx to Citizens Bank!!)
Gas Prices are fluxuating so much around here many places have left the cents off their prices up on the signs!! This has been the case for weeks now.
I paid $2.48 a couple days ago at Sunoco, thats where I find the best prices lately. (Even ran into a FREE gas bonanza there a month ago and got $20 of 93! Special thanx to Citizens Bank!!)
Gas Prices are fluxuating so much around here many places have left the cents off their prices up on the signs!! This has been the case for weeks now.
08-15-2005, 06:57 PM
#106
Senior Member
Join Date: May 2004
Posts: 6,190
Originally Posted by dr-rjp
Question for the chemists in the audience:
Are there are differences in specific density among different grades of gas?
Are there are differences in specific density among different grades of gas?
08-16-2005, 01:19 AM
#108
Senior Member
Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by dr-rjp
Question for the chemists in the audience: Are there are differences in specific density among different grades of gas?
Gasoline is a blend of many different components. Some of the high octane componenants that can be blended into premium are slightly heavier than the lower octane components that are blended into regular -- and a few are slightly lighter. I think it is generally safe to say that from a given refinery regular will never be heavier than premium while premium can be heavier than regular. It is also possible, but not likely, that one company's regular will be slightly heavier than another company's premium.
Hope this helps. (I'm an engineer not a chemist.)
08-16-2005, 01:28 AM
#109
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Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by carnal_c30
my last tank was of 76 100 octane at 4.99 a gallon.... normal premium is getting closer and closer to that... 3.19 in my area
Now if the gasoline you bought was 100 Research Octane (R), and not the common pump octane rating in the US which is shown by the formula (R+M)/2, that will have a pump octane of about 95. This is still more octane that the normal Max can effectively use.
08-16-2005, 10:28 AM
#111
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Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
Originally Posted by BK1
Don't have 91 in many places around me. It's either 87, 89, or 93. I get the 93.
08-18-2005, 10:16 AM
#112
Originally Posted by SilverMax_04
What a waste of money. Maximas were designed for maximum performance at 91 octane. If you need higher octane, you either have a turbo-charger on your engine, or you have too many engine deposits and need the engine cleaned up (put in a bottle of Techron as a starter). Otherwise you wasted $1.80 per gallon for fuel that your Max does not need and can't take full advantage of.
Now if the gasoline you bought was 100 Research Octane (R), and not the common pump octane rating in the US which is shown by the formula (R+M)/2, that will have a pump octane of about 95. This is still more octane that the normal Max can effectively use.
Now if the gasoline you bought was 100 Research Octane (R), and not the common pump octane rating in the US which is shown by the formula (R+M)/2, that will have a pump octane of about 95. This is still more octane that the normal Max can effectively use.
08-19-2005, 12:55 AM
#114
Originally Posted by Bobo
Based on your avatar, it would appear that way!
avatar? sig? or graphic in sig? my use of 100 octane does not relate to the bent 19"s 100 octane did not fix my bent 19" wheels
08-19-2005, 11:10 AM
#116
Originally Posted by MaxGordon7
its $$2.639 for the super 93 here. The funny thing is anytime i use 89 oct i get better gas milage, im guessing its degressing the timing for the pinging. Ive been doing 10 gallons 93 and the rest 87. It runs good and saves a bit, at least im hoping.
And, yes, the knock sensor is retarding your timing in response to the drop in octane. Personally, I would not want to do that on a long-term basis.
08-19-2005, 11:12 AM
#117
Originally Posted by BK1
Don't have 91 in many places around me. It's either 87, 89, or 93. I get the 93.
See above (re: Mixing 93 octane and 87 octane)...
However, it is cheaper to get 91 octane by mixing equal parts of 89 and 93 octane.
08-21-2005, 07:34 AM
#118
Originally Posted by Bobo
Who cares? A gallon of gasoline weighs about 80% of that of a gallon of water and floats on top of water. What more do you need to know? If you want to get this technical, join bobistheoilguy.com and you will be well schooled in no time flat.
Secondly, I care if only because I can think for myself. Differences in SD, no matter how small, would answer several question I have about using one versus the other.
Yes, I do know that gas floats on water...along with hollow cranial containers.
08-21-2005, 08:27 AM
#119
Senior Member
Join Date: May 2004
Posts: 6,190
Originally Posted by dr-rjp
First of all, I'd rather have root canals on all my teeth than have anything to do with "Boob, the oil slick, dot com." The guy couldn't find his head with three hands and two flashlights. Anyone who puts gear oil in a blender set on "puree" just to diss Lucas oil additive needs professional help (and not of the automotive variety).
Secondly, I care if only because I can think for myself. Differences in SD, no matter how small, would answer several question I have about using one versus the other.
Yes, I do know that gas floats on water...along with hollow cranial containers.
Secondly, I care if only because I can think for myself. Differences in SD, no matter how small, would answer several question I have about using one versus the other.
Yes, I do know that gas floats on water...along with hollow cranial containers.
08-21-2005, 10:55 AM
#120
Senior Member
Join Date: Jun 2003
Location: Colorado Springs, Colorado
Posts: 1,994
There are a lot of knowledgable members on this section (Fluids and Lubes) of this site. I particularly like the postings about lubes -- something I know something about, but can always learn more. But all of you need to determine who are the experts (Bill in the area of lubes for example) and those who are just giving their opinions.
I find in the area of octane, that everybody is an expert. They all know what they know and don't try to tell them any different. In this area (octane) I know more than I do about lubes. And I'm happy to share what I know. Hope this helps those who want to learn more.
I find in the area of octane, that everybody is an expert. They all know what they know and don't try to tell them any different. In this area (octane) I know more than I do about lubes. And I'm happy to share what I know. Hope this helps those who want to learn more.