Upgrading a 240hk MCX Nytro

[Tarzan]

Thanks! I get it in Tromsø and the E-85 is very good to use in Turbo engine, i blend it 80%E-85 and 20% 98-okt because in cold days the engine will start easier.

E85 is an alcohol fuel mixture that typically contains a mixture of up to 85% denatured fuel ethanol and gasoline or other hydrocarbon (HC) by volume. On an undenatured basis, the ethanol component ranges from 70% to 83%.

E85 has an octane rating higher than that of regular gasoline's typical rating of 87, or premium gasoline's 91-93. This allows it to be used in higher compression engines which tend to produce more power per unit of displacement than their gasoline counterparts. The Renewable Fuels Foundation states in its Changes in Gasoline IV manual, "There is no requirement to post octane on an E85 dispenser. If a retailer chooses to post octane, they should be aware that the often cited 105 octane is incorrect. This number was derived by using ethanol’s blending octane value in gasoline. This is not the proper way to calculate the octane of E85. Ethanol’s true octane value should be used to calculate E85’s octane value. This results in an octane range of 94-96 (R+M)/2. These calculations have been confirmed by actual octane engine tests." [12]

One complication is that use of gasoline in an engine with a high enough compression ratio to use E85 efficiently would likely result in catastrophic failure due to engine detonation, as the octane rating of gasoline is not high enough to withstand the greater compression ratios in use in an engine specifically designed to run on E85. Use of E85 in an engine designed specifically for gasoline would result in a loss of the potential efficiency that it is possible to gain with this fuel. Using E85 in a gasoline engine has the drawback of achieving lower fuel economy as more fuel is needed per unit air (stoichiometric fuel ratio) to run the engine in comparison with gasoline. This corresponds to a lower heating value (units of energy per unit mass) for E85 than gasoline. Some vehicles can actually be converted to use E85 despite not being specifically built for it.

Because of the lower heating value E85 has a cooler intake charge, which coupled with it's high stability level from it's high octane rating, has also been used as a "power adder" in turbocharged performance vehicles. These modifications have not only resulted in lower GHG emissions, but also resulted in 10-12% horsepower and torque increase at the wheels. Because of it's low price (less than $2.00/gal in some places) and high availability in certain areas people have started to turn to using it in place of the high end race fuels that typically cost over $10.00/gal.

 

[rxrider]

Thanks Tarzan for sharing this information.
Tromsø will be the nearest place to get E85 for us living north and east of Tromsø.

Statoil sells E-85 with an octane rating of 101.5 RON (Europe).

Great idea to run a little more gasoline for easier starting.