Sorry to dowse the flames but only on paper and in a test lab, can they produce good numbers.
The MnCAR Lab is inside a climate controlled, sealed laboratory. The fuel for testing arrives in air-tight containers containing prime samples from the refineries. The fuel does not sit in tanker trucks for days while being delivered, pumped into the gas station tanks during all sorts of weather and then sit absorbing the make-up air in the tank until some poor sap fills their car.
If the study used real world samples from local stations, let them sit in non-controlled barns in the same gas containers we use, and tested the vehicles outside randomly over the course of a few days like a real car does and not on a "SuperFlow AC motor-driven chassis dynamometer" inside a sealed, moisture controlled lab, then I would actually believe the results. But then again, they can't do that because then the results wouldn't be "controlled" tests.
Most people forget that when an organization funds a study, they set the parameters for testing and decide what "Simulates" the real world and what should be ignored.
The devil is always in the details. :confused2:
The studies you listed did not test the amount of water and other gum alcohol in the fuel in accordance with the ATSM
Denatured Fuel Ethanol for Blending with Gasolines for Use as Automotive Spark-Ignition Engine Fuel; ASTM D4806
ASTM D4806 -10a Standard Specification for Denatured Fuel Ethanol for Blending with Gasolines for Use as Automotive Spark-Ignition Engine Fuel
"Fuel containing 1.0% by volume or more should not be used for spark-ignition engines."
Test Method for Existent Gum in Fuels by Jet Evaporation; ASTM D381
ASTM D381 -09 Standard Test Method for Gum Content in Fuels by Jet Evaporation
"Gasoline with a "washed gum" greater than 5 mg/ 100 mL not be used for spark-ignition engines."
In contrast, UL does list all of their testing procedures, criteria used, and results.
Compared to the requirements of ASTM D4806, most harvested samples contained gum levels that were
double the limit, acidity that was
double the limit, pHe that was unreasonably low, sulfate levels that were
seven times the limit and moisture content that was
45% over the limit.
While some harvested samples in this limited population performed well, the overall non-compliant results indicate that high percentage ethanol fuel blends can degrade materials and result in degradation to products that may affect their ability to meet the performance requirements of UL standards. This was manifested in the harvested sample population primarily in the form of leakage from sealed joints on the equipment. Visual evidence of degradation was also noted in some cases.
http://www.ul.com/global/documents/...tiblefluids/development/E85ResearchReport.pdf
Again, I am not against the concept of ethanol enhanced fuels, but in order to do so we need to completely change our fuel distribution infrastructure to prevent contamination that occurs in the current distribution system.
Doug