Like Tree0Likes

Octane levels...??

Reply
Old 02-01-2011, 01:43 PM
  #11
Registered
 
X-Rated30's Avatar
 
Join Date: Mar 2001
Location: Monroe, LA
My Boats: 1997/2010 Spectre Catamaran w/ twin 250XS Sports
Posts: 3,882
Default

Quote:
Originally Posted by James View Post
I have an electronic octane test machine. I have found that after testing more than 60 separate tests that gasoline sold at the pump has 1 - 1.5 more octane than is the Minimum rating suggested on the pump. Gasoline tested from 7-11 last week, I purchased 89 octane was actually 90.5 octane when tested. Out of 60 test including Exxon, Shell, Sunoco, Mom & Pops little store, Marina etc... I have never had less that 1 octane above what is written on the pump, and if your read the pump carefully it states that that is the "minimum" octane rating. I went to the auto parts store and purchased a bottle of everything they had on the shelf to increase octane. I can tell you it takes a lot of "booster" to increase a gallon 1 point and ton of "booster" to increase the octane one number. I have gasoline being tested that is more than 1 1/2 years old from the purchase date, left purposely in sealed and unsealed containers. Each test has lost no octane over the period. Understand that the fuel may have lost volatiles that make it hard to start, smell bad etc...but it has not lost octane. These fuels also contain 10% ethanol.
Great info. Out of curiosity... How do you know that your machine is calibrated correctly and is giving an accurate reading? Sounds like you have been at this a while.
X-Rated30 is offline  
Reply With Quote
Old 02-01-2011, 02:16 PM
  #12
Platinum Member
Platinum Member
 
HUSTLEthis's Avatar
 
Join Date: Nov 2001
Location: Laguna Beach,Ca.
Posts: 793
Default

Quote:
Originally Posted by James View Post
I have an electronic octane test machine. I have found that after testing more than 60 separate tests that gasoline sold at the pump has 1 - 1.5 more octane than is the Minimum rating suggested on the pump. Gasoline tested from 7-11 last week, I purchased 89 octane was actually 90.5 octane when tested. Out of 60 test including Exxon, Shell, Sunoco, Mom & Pops little store, Marina etc... I have never had less that 1 octane above what is written on the pump, and if your read the pump carefully it states that that is the "minimum" octane rating. I went to the auto parts store and purchased a bottle of everything they had on the shelf to increase octane. I can tell you it takes a lot of "booster" to increase a gallon 1 point and ton of "booster" to increase the octane one number. I have gasoline being tested that is more than 1 1/2 years old from the purchase date, left purposely in sealed and unsealed containers. Each test has lost no octane over the period. Understand that the fuel may have lost volatiles that make it hard to start, smell bad etc...but it has not lost octane. These fuels also contain 10% ethanol.
What have you found with 100LL Av gas?
Thanks
HUSTLEthis is offline  
Reply With Quote
Old 02-01-2011, 02:37 PM
  #13
Registered
 
Join Date: Jan 2009
Posts: 69
Default

Quote:
Originally Posted by HUSTLEthis View Post
What have you found with 100LL Av gas?
Thanks
+1 on this question. I run 100LL Av gas in a Ford 460 high compression hot rod and it does great.
IlmorDonzi is offline  
Reply With Quote
Old 02-01-2011, 02:59 PM
  #14
Platinum Member
Platinum Member
 
Join Date: Nov 2000
Location: PA USA
My Boats: Fast Boats , Fast Cars
Posts: 1,417
Default

James thanks for the great information, where can you purchase this octane tester?
baja27 is offline  
Reply With Quote
Old 02-01-2011, 03:15 PM
  #15
VIP Member
VIP Member
 
Join Date: Feb 2001
Location: virginia
My Boats: Racing
Posts: 543
Default

I can not test fuel with lead, 100LL and some race fuels can not be tested for this reason with this machine. Calibration is always and issues, to be sure I'm correct I have a stack of bibles, my fingers crossed and plenty of beer for emergencies.

This machine has a self calibration cycle and to be sure it is sent back to the lab each year for calibration assurance.

As an example the booster "104 Octane" is in fact 104 octane, put that 1 pint bottle of 104 octane booster into a gallon of 89 octane gas and and you will have a blend of the two corrected for volume.

A great additive to increase octane is water, down side is that it does not burn so well.
James is offline  
Reply With Quote
Old 02-01-2011, 03:19 PM
  #16
VIP Member
VIP Member
 
Join Date: Feb 2001
Location: virginia
My Boats: Racing
Posts: 543
Default

I missed you post baja27, I'll get the company info, this little gadget is about $ 12,000.00
James is offline  
Reply With Quote
Old 02-01-2011, 03:52 PM
  #17
Registered
 
tomcat's Avatar
 
Join Date: Feb 2001
Posts: 1,484
Default

Maybe order yourself some isooctane from the local lab supply place. Should read 100 and you could do your own calibrations anytime you want.
tomcat is offline  
Reply With Quote
Old 02-02-2011, 06:29 AM
  #18
Registered
 
Join Date: Jul 2005
Posts: 683
Default

Quote:
Originally Posted by James View Post
I have an electronic octane test machine. I have found that after testing more than 60 separate tests that gasoline sold at the pump has 1 - 1.5 more octane than is the Minimum rating suggested on the pump. Gasoline tested from 7-11 last week, I purchased 89 octane was actually 90.5 octane when tested. Out of 60 test including Exxon, Shell, Sunoco, Mom & Pops little store, Marina etc... I have never had less that 1 octane above what is written on the pump, and if your read the pump carefully it states that that is the "minimum" octane rating. I went to the auto parts store and purchased a bottle of everything they had on the shelf to increase octane. I can tell you it takes a lot of "booster" to increase a gallon 1 point and ton of "booster" to increase the octane one number. I have gasoline being tested that is more than 1 1/2 years old from the purchase date, left purposely in sealed and unsealed containers. Each test has lost no octane over the period. Understand that the fuel may have lost volatiles that make it hard to start, smell bad etc...but it has not lost octane. These fuels also contain 10% ethanol.
Where did you get the electronic test machine.
Enough 4 Play is offline  
Reply With Quote
Old 02-02-2011, 07:27 AM
  #19
Gold Member
Gold Member
 
seafordguy's Avatar
 
Join Date: Jun 2006
Location: Seaford, VA
My Boats: Cigarette - Cafe Racer
Posts: 3,683
Default

Quote:
Originally Posted by James View Post
I have gasoline being tested that is more than 1 1/2 years old from the purchase date, left purposely in sealed and unsealed containers. Each test has lost no octane over the period. Understand that the fuel may have lost volatiles that make it hard to start, smell bad etc...but it has not lost octane. These fuels also contain 10% ethanol.
This is interesting to know because I have always heard that fuel will lose octane points over time.
seafordguy is offline  
Reply With Quote
Old 02-02-2011, 09:11 AM
  #20
VIP Member
VIP Member
 
Join Date: Feb 2001
Location: virginia
My Boats: Racing
Posts: 543
Default

I will dig up the manufactuer of the machine, I believe the cost was $ 12,000.00 or so.

Rumor mill was very strong leading me to believe that Ethanol made gas go bad and the result was reduced Octane. I had several engine failures, so rather than buy more engines I tested fuel.

The only guys that really care about Octane are the aircraft and boat owners, a car on the track with 14:1 is already buy fuel, and he is only buring 20 gallons so cost and availibility is not an issue. FAA has very few rules regarding the age of gasoline, of course purge and check for water before climbing in.

I was so sure someone was trying to screw me selling me "bad" gas that I purchased this machine. Fact is that I have yet to find any gas that is less than advertized Octane. I have gone to some gas stations where a second person has to watch your back while fueling, and still the fuel is as advertized.

I have looked for and found old lawn mowers, gas smells foul, but the octane is 87 +, of course I do not know what or when the fuel was put in the tank, nor to I believe that any equipment would run with this old gas, but the octane is ok.

To get a good pump test I pre-purge the fuel line, pump 4 gallons through the pump into the car, then fill a 1 gallon container for testing to help insure I'm getting the gas paid for and not fuel left in the line from the previous use.

Lessons learned -
James is offline  
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 03:59 AM.


Copyright 2011 OffShoreOnly. All rights reserved.