air filter is brand new with less than 100 miles on it, plugs may need to be changed. I use shell 93 since its supposedly really good fuel. Oil change has less than 500 miles, synthetic used after the initial break in of the motor. Alignment was done in march 2011 after the wheels were added and the suspension was installed. Camber kit added as well and car was lowered with a four wheel alignment, car drives straight as an arrow. I will replace the fuel filter and go over my vaccum connections, all my fuel lines and fix that breather port/pcv issue.