Hello,
I have a 02 Subaru Impreza WRX. This is a 2.0 Liter, 4 cylinder turbocharged motor. It is multi-port fuel injection (does that go without saying these days
)and is heavily controlled by the computer (ECU). The owners manual calls for gas with an AKI of 91 or better, which means here in the northeast I use 93 or better. I have owned turbo Subaru's before (91 Legacy Turbo) so I am all to aware of how much authority the ECU has, and how much it fears any sign of detonation or pre-ignition. But the WRX sure takes it to the next level of paranoia. When I use straight 93 (Mobil, Exxon, which are probably the same now) there are noticeable and discouraging plateaus and dips in the torque curve (as measured by the ol' butt dyno). Being an Amsoil user, I tried their Series 2000 Octane Boost. Once the ECU slooooowly adapts, these dips and such are drastically reduced. Any return to straight gas brings back the dreaded dips. I have even tried some of Sunoco's GT100 gas, that stuff is beuatiful. It is drastically better than 93 AKI/Amsoil octane boost brew. If it wasn't $4 a gallon, or if I won the lottery, I'd use it all the time.
So, does anyone have any hard data on Amsoil's Octane Boost? They claim something like a 7 point boost in AKI in 87 AKI gas, but does anyone know it's effect on 93? Obviously it does something for my car.
I have a 02 Subaru Impreza WRX. This is a 2.0 Liter, 4 cylinder turbocharged motor. It is multi-port fuel injection (does that go without saying these days
So, does anyone have any hard data on Amsoil's Octane Boost? They claim something like a 7 point boost in AKI in 87 AKI gas, but does anyone know it's effect on 93? Obviously it does something for my car.