Originally Posted By: Jaymus
Originally Posted By: jmac
Originally Posted By: Jaymus
BTW, 'Top-Tier' mandates that to meet their specifications, the gasoline must have no less than 8% and no more than 10% ethanol. Maybe Amoco/BP and Exxon/Mobil prefer to use less than 8%. Fine with me.
Once again, there is no such mandate on TT fuel at the pump. The
TEST fuel used to evaluate the additive package submitted for TT status is what is mandated to contain a percentage of ethanol, since ethanol is in wide spread use and its presence degrades the performance of many additives for fuel.
Go here:
http://www.toptiergas.com/deposit_control.html
Please tell me where it says only the test fuel has to have ethanol, but when it goes out to be sold at markets, it doesn't have to have it.
1.1 Retail Gasoline Performance Standards. The deposit control performance of unleaded gasoline conforming to section 1 of this document shall be met at the retail level in all grades of gasoline sold by a fuel company in all marketing areas of a selected nation.
1.2 Deposit Control Additive Requirements.
The deposit control additive used to meet the performance Standards described in 1.3 shall meet the substantially similar definition under Section 211(f) of the Clean Air Act. Also, the additive shall be certified to have met the minimum deposit control requirements established by the U.S. Environmental Protection Agency (EPA) in 40 CFR Part 80. Lastly, the additive shall be registered with the EPA in accordance with 40 CFR Part 79.
1.3 Deposit Control Initial Performance Standards.
TEST METHOD 1.3.1.1 ... Tests demonstrating base fuel minimum deposit level (1.3.1.2) and additive performance (1.3.1.3) shall be conducted using the same engine block and cylinder head. All results shall be derived from operationally valid tests in accordance with the test validation criteria of ASTM D 6201.
1.3.1.3 Demonstration of Performance. The base fuel from 1.3.1.2 shall contain enough deposit control additive such the IVD is no more than 50 mg averaged over all intake valves.
1.3.2.2 Base Fuel. Combustion chamber deposits shall be measured for the base fuel from 1.3.1.2.
Section 1.3 is all about in-house test methods. No where does it claim to be about production fuel delivered at the pump, only the additives used in the fuel. In order to test an additive you have to define the base fuel used in those tests. Moreover, that base fuel must
produce deposits (the control) that the additives being tested can be shown to prevent (the test).