Hey guys, noticed ur all giving the same response here.. I put 87 octane in my msp, and yes.. definatly ran like s***, and had NOOO power at all.. i drove the car 350 kms on the highway, with 87 in it, and when passing cars on the single lane highway, it took everything that car had to get up to 145-150.
The fuel milage was terrible also.. Calculated it and I only got 30 mpg driving at 120 km/h compared to 34-36 at the same speed with the 93 octane. So mights well run the higher octane spend the money on the gas, and get a little bit better gas milage as well.