Fuel Additive pro/con
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Posting Guru
Joined: Apr 2004
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From: Corinth, TX
Visualize the combustion process.
If you have low cetane, it means the fuel starts combusting too soon -- before the fuel droplets are properly mixed with the compressed charge.
On the other hand, excess cetane mean that combustion is delayed too long.
Neither is good.
If you have low cetane, it means the fuel starts combusting too soon -- before the fuel droplets are properly mixed with the compressed charge.
On the other hand, excess cetane mean that combustion is delayed too long.
Neither is good.
The cetane number is a measure of how readily the fuel starts to burn (autoignites) under diesel engine conditions. A fuel with a high cetane number starts to burn shortly after it is injected into the cylinder; therefore, it has a short ignition delay period. Conversely, a fuel with a low cetane number resists autoignition and has a longer ignition delay period.
I guess my goal here is to find a target fuel quality, and find a consistent source, then adjust the fuel I get from that source to something as close to target as possible. Originally, I wanted a way to buy "bottled insurance" in the form of an additive. Now, I'm thinking that I could feasibly run into higher than normal cetane fuel in the wild, and unknowingly treat it into the "grossly above optimum" range. At this point I think I'm going to do my best to stick to Chevron for my road trip and drop the cetane booster in favor of a lubricity treatment. Thanks, Ford, for giving me Sirius Travel Link
Post Fiend
Joined: Jul 2005
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just a point of fact, the cetane number is actually the opposite of the above. Again referencing the PDF I linked earlier:
your other statement is patently correct, though. a significant delta from optimum, in either direction, isn't good. To that point, I wonder what the tolerances are... if the PCM has a way to adjust injection timing, I'd think that the published 40-52 cetane range of readily available fuel should be okay. 40, of course, would warrant a cetane booster.
I guess my goal here is to find a target fuel quality, and find a consistent source, then adjust the fuel I get from that source to something as close to target as possible. Originally, I wanted a way to buy "bottled insurance" in the form of an additive. Now, I'm thinking that I could feasibly run into higher than normal cetane fuel in the wild, and unknowingly treat it into the "grossly above optimum" range. At this point I think I'm going to do my best to stick to Chevron for my road trip and drop the cetane booster in favor of a lubricity treatment. Thanks, Ford, for giving me Sirius Travel Link
your other statement is patently correct, though. a significant delta from optimum, in either direction, isn't good. To that point, I wonder what the tolerances are... if the PCM has a way to adjust injection timing, I'd think that the published 40-52 cetane range of readily available fuel should be okay. 40, of course, would warrant a cetane booster.
I guess my goal here is to find a target fuel quality, and find a consistent source, then adjust the fuel I get from that source to something as close to target as possible. Originally, I wanted a way to buy "bottled insurance" in the form of an additive. Now, I'm thinking that I could feasibly run into higher than normal cetane fuel in the wild, and unknowingly treat it into the "grossly above optimum" range. At this point I think I'm going to do my best to stick to Chevron for my road trip and drop the cetane booster in favor of a lubricity treatment. Thanks, Ford, for giving me Sirius Travel Link
Opps.,. you are, of course, correct.. I got it mixed up.
Thanks for fixing errata.
Low cetane = slow to combust
High cetane = readily combust.
Posting Guru
Joined: Mar 2003
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fuel
i have an early 03 6.0 with 185,000 trouble free miles except for an alternater and an icp sensor. my fuel regimine is,to a full tank of fuel i put in 5 gallons of kero,4 oz's of power service silver cetane booster and 4 oz's of wally world tech-3 ashless 2 stroke oil.it's a little bit of a pain ,but she sure runs good.
Junior User
Joined: Jun 2009
Posts: 92
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From: Southeast, TX
F.Y.I. I just read on the chevron website that Texas, like California, has a minimum cetane requirement of 48 in it diesel according to TxLED. Here is the link. Chevron Products: Fuel School AnswersUnfortunately, this program only covers 110 counties in eastern Texas. Glad i'm in one of the 110... http://www.tceq.state.tx.us/implemen...eandiesel.html
Junior User
Joined: Jun 2009
Posts: 92
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From: Southeast, TX
Straight from the TXLED website...
Adopted May 9, 2007 Effective May 31, 2007
§114.319. Affected Counties and Compliance Dates.
(a) Affected persons in the counties listed in subsection (b) of this section shall be in compliance in accordance with the schedule listed in subsection (c) of this section with §§114.312 -
114.317 of this title (relating to Low Emission Diesel Standards; Designated Alternate Limits; Registration of Diesel Producers and Importers; Approved Test Methods; Monitoring, Recordkeeping, and Reporting Requirements; and Exemptions to Low Emission Diesel Requirements), as applicable, for diesel fuel defined under §114.6(7)(A) of this title (relating to Low Emission Fuel Definitions) that may ultimately be used to power a diesel-fueled compression-ignition engine in a motor vehicle or in non-road equipment.
(b) The following counties are subject to subsection (a) of this section:
(1) Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, and Tarrant;
(2) Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller;
(3) Hardin, Jefferson, and Orange; and
Texas Commission on Environmental Quality Page 26 Chapter 114 - Control of Air Pollution from Motor Vehicles
(4) Anderson, Angelina, Aransas, Atascosa, Austin, Bastrop, Bee, Bell, Bexar, Bosque, Bowie, Brazos, Burleson, Caldwell, Calhoun, Camp, Cass, Cherokee, Colorado, Comal,Cooke, Coryell, De Witt, Delta, Falls, Fannin, Fayette, Franklin, Freestone, Goliad, Gonzales, Grayson, Gregg, Grimes, Guadalupe, Harrison, Hays, Henderson, Hill, Hood, Hopkins, Houston, Hunt, Jackson, Jasper, Karnes, Lamar, Lavaca, Lee, Leon, Limestone, Live Oak, Madison, Marion, Matagorda, McLennan, Milam, Morris, Nacogdoches, Navarro, Newton, Nueces, Panola, Polk, Rains, Red River, Refugio, Robertson, Rusk, Sabine, San Jacinto, San Patricio, San Augustine, Shelby, Smith, Somervell, Titus, Travis, Trinity, Tyler, Upshur, Van Zandt, Victoria, Walker, Washington, Wharton, Williamson, Wilson, Wise, and Wood.
Adopted May 9, 2007 Effective May 31, 2007
§114.319. Affected Counties and Compliance Dates.
(a) Affected persons in the counties listed in subsection (b) of this section shall be in compliance in accordance with the schedule listed in subsection (c) of this section with §§114.312 -
114.317 of this title (relating to Low Emission Diesel Standards; Designated Alternate Limits; Registration of Diesel Producers and Importers; Approved Test Methods; Monitoring, Recordkeeping, and Reporting Requirements; and Exemptions to Low Emission Diesel Requirements), as applicable, for diesel fuel defined under §114.6(7)(A) of this title (relating to Low Emission Fuel Definitions) that may ultimately be used to power a diesel-fueled compression-ignition engine in a motor vehicle or in non-road equipment.
(b) The following counties are subject to subsection (a) of this section:
(1) Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, and Tarrant;
(2) Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller;
(3) Hardin, Jefferson, and Orange; and
Texas Commission on Environmental Quality Page 26 Chapter 114 - Control of Air Pollution from Motor Vehicles
(4) Anderson, Angelina, Aransas, Atascosa, Austin, Bastrop, Bee, Bell, Bexar, Bosque, Bowie, Brazos, Burleson, Caldwell, Calhoun, Camp, Cass, Cherokee, Colorado, Comal,Cooke, Coryell, De Witt, Delta, Falls, Fannin, Fayette, Franklin, Freestone, Goliad, Gonzales, Grayson, Gregg, Grimes, Guadalupe, Harrison, Hays, Henderson, Hill, Hood, Hopkins, Houston, Hunt, Jackson, Jasper, Karnes, Lamar, Lavaca, Lee, Leon, Limestone, Live Oak, Madison, Marion, Matagorda, McLennan, Milam, Morris, Nacogdoches, Navarro, Newton, Nueces, Panola, Polk, Rains, Red River, Refugio, Robertson, Rusk, Sabine, San Jacinto, San Patricio, San Augustine, Shelby, Smith, Somervell, Titus, Travis, Trinity, Tyler, Upshur, Van Zandt, Victoria, Walker, Washington, Wharton, Williamson, Wilson, Wise, and Wood.
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