Running E85 can have some real benefits for a turbocharged Subaru. Because it has a very high effective octane rating, it is very resistant to detonation and pre-ignition, and it also has a lot of cooling benefits because it is an alcohol based fuel. If you make the switch to E85, you will most likely feel the difference in a stock WRX or STI, but there can be even greater benefits for high-power builds, race cars, and cars like the FA20DIT WRX that is running much higher compression than the WRX and STI that came equipped with the EJ series engines.

But with all of the potential benefits, there are also some drawbacks to consider, one of the biggest of which is the decrease in fuel economy, but on newer cars, there can be some warranty implications to consider as well.

For our question of the week, we take a look at the benefits of E85, and when and where it makes sense to look at switching to this fuel.

There is also the question of Flex-Fuel, and up until the last week or two, that was one of the best options if you were looking to make this conversion in a street car. But right before we started working on this video, Cobb discontinued their Flex-Fuel kits, so that brings another dimension to this decision that we discuss as well.

Thanks for watching and Stay Tuned!

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