Uh ohhh someone brought out the big guns
While I don't want to question your intelligence as you have TONS more hands on experience than me, I do have questions reguarding your statements. Maybe you can help me understand. I'll go in order.
1. The amount of detergents in the gasoline of ANY grade is mandated by the EPA. They all carry the same amount. Here'* a quote:
"EPA requires the use of additives to control the formation of engine and fuel supply system deposits in all U.*. gasoline. An interim program has been in place since 1995 which requires the use of detergents to control intake valve deposits (IVD) and port fuel injector deposits (PFID) in gasoline engines..." and "As of July 1, 1997, detergent manufacturers have been required to sell only properly certified detergents to their detergent blending customers. In addition, detergent blenders must blend certified detergents at the prescribed concentration into all gasoline they distribute. Furthermore, distributors must sell or transfer only gasoline and post-refinery components (PRC) properly additized with certified detergents. As of August 1, 1997, gasoline retailers have been required to ensure that all gasoline sold or transferred to the ultimate consumer is properly additized with certified detergents. Implementation of the detergent certification program will realize the full expected environmental benefits of controlling IVD and PFID, namely, reductions in emissions of hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx), and improvement of fuel economy. "
3 and 4 (and I think 6?). Oxygenated fuel can not provide energy, and is actually LESS powerful (because space is taken up) than non oxygenated fuel. They actually use oxygenated fuel in the winters, incase that was news. Here'* a few quotes, two of which were used earlier:
"It should be noted that because oxygenates contain oxygen that can
not provide energy, they will have significantly lower energy contents.
They are added to provide octane, not energy. For an engine that can be
optimised for oxygenates, more fuel is required to obtain the same power,
but they can burn slightly more efficiently, thus the power ratio is not
identical to the energy content ratio. They also require more energy to
"Oxygenates are just preused hydrocarbons . They contain oxygen, which can not provide energy, but their structure provides a reasonable antiknock value, thus they are good substitutes for aromatics, and they may also reduce the smog-forming tendencies of the exhaust gases . Most oxygenates used in gasolines are either alcohols ( Cx-O-H ) or ethers (Cx-O-Cy), and contain 1 to 6 carbons. Alcohols have been used in gasolines since the 1930s, and MTBE was first used in commercial gasolines in Italy in 1973, and was first used in the US by ARCO in 1979. The relative advantages of aromatics and oxygenates as environmentally-friendly and low toxicity octane-enhancers are still being researched"
"Reformulated gasolines usually contain oxygenates, which have less energy per gallon than the hydrocarbons they displace. The most mileage loss that may be attributed to oxygenates is about three percent. Each gallon of oxygenated gasoline will yield slightly less driving distance than a gallon of conventional gasoline. This fuel economy loss is less than three percent, and is often not detected because so many other variables can account for fuel economy loss."
Note that the last one is from Shell themself.
I guess thats all I have at the moment.