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| gas octane https://slantsix.org/forum/viewtopic.php?t=13031 |
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| Author: | exoJjL [ Wed May 18, 2005 8:37 pm ] |
| Post subject: | gas octane |
i know this isnt really related to the slant six engine, but I was wondering if anyone knows what three octane fuels you could at a gas station back in the 60's and 70's....i wasnt sure if it has changed at all. |
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| Author: | Charrlie_S [ Thu May 19, 2005 12:25 am ] |
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There were more then three octane ratings in the 60's. Sunoco had two fuel tanks, one with what they called "190" and another with "280". The pump had a dial, which was set for the octane you wanted and the pump mixed the 190 and 280 in the proper ratio. The highest rating was 100, Hess also had "101" octane. One thing to remember, though, the octane rating was measured differently, back then. It was measured, using the "research" method. Today, gasoline is rated using an average of the "research" and "motor" methods, which gives a lower rating. By the way, octane is only one of many factors, that determine if a gasoline is suitable for a particular engine. That is why VP has this many different fuels. http://www.vpracingfuels.com/vp_01_fuel ... E#unleaded |
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| Author: | SlantSixDan [ Thu May 19, 2005 6:41 am ] |
| Post subject: | |
Note also that the AKI method [(RON + MON) ÷ 2 ] is only used in North America. Elsewhere in the world, they still use only the RON octane ratings, so their octane numbers are higher for any given level of antiknock performance. |
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| Author: | Charrlie_S [ Thu May 19, 2005 7:08 am ] |
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Quote: Note also that the AKI method [(RON + MON) ÷ 2 ] is only used in North America. Elsewhere in the world, they still use only the RON octane ratings, so their octane numbers are higher for any given level of antiknock performance.
Thanks, Dan. I forgot to mention that. I sometimes forget, we have members in other countries, that have different standards, rules, regulations. I only have one foot in the "IT" age.
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| Author: | exoJjL [ Sun May 22, 2005 10:12 am ] |
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interesting stuff |
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| Author: | Jeb [ Sun May 22, 2005 3:55 pm ] |
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Which Octane rating is best for my stock 74 Duster, 87, 89, or 93? Right now I run 89. |
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| Author: | Bob D [ Sun May 22, 2005 6:00 pm ] |
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I've always heard that the lowest octane that doesn't cause detonation is best and the most efficient. Bob D |
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| Author: | Craig [ Sun May 22, 2005 9:01 pm ] |
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I just ran a tank of blened fuel through my '87 Dodge truck slant 6. 5 gallons of E85 (70-85% ethanol) + 15 gallons of E10 (regular gasoline in Minnesota). Final mixture should have been 25 to 28% ethanol. Ran fine, got rid of the ping I had with regualr 87 octane stuff. Wonder what the octane rating was? The regular 87 octane gasoline in MN contains 10% ethanol hence E10. The E85 pump label states it contains minum 70% ethanol. Should be closer to 85%. Supposed to be 100+ octane. |
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| Author: | exoJjL [ Sun May 22, 2005 10:22 pm ] |
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Quote: I've always heard that the lowest octane that doesn't cause detonation is best and the most efficient.
if i remember correctly the booklet for my 73' scamp says to run a minimun of 91 octane......
Bob D |
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| Author: | Charrlie_S [ Mon May 23, 2005 4:54 am ] |
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Quote: I just ran a tank of blened fuel through my '87 Dodge truck slant 6.
Are you sure? I would think e-85, would be 15% ethenol and 85% gasoline. Since more ethenol is required, for a proper air fuel ratio, then gasoline, at 85% ethenol, major carb rejetting would be required. I don't know, I have never seen E-85.
5 gallons of E85 (70-85% ethanol) + 15 gallons of E10 (regular gasoline in Minnesota). Final mixture should have been 25 to 28% ethanol. Ran fine, got rid of the ping I had with regualr 87 octane stuff. Wonder what the octane rating was? The regular 87 octane gasoline in MN contains 10% ethanol hence E10. The E85 pump label states it contains minum 70% ethanol. Should be closer to 85%. Supposed to be 100+ octane. |
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