I just bought a 2004 Ford Focus ZTS with a 2.3 Liter I4 PZEV motor - according to the Owners Guide. These engines seem to only have a air filter sensor instead of the option to replace your air filter. I read online someplace the filter can be replaced but is good until 100K. I just bought this car with 47,000 miles on it and plan to run it through one more standard valvoline oil change to 49 - 50 K before I change the engine over to 0w-20 Amsoil (20K oil) or 5w-20 Amsoil (15K oil), since I put on about a 30 K a year driving for work in the Minneapolis / St. Paul, MN metro (half highway /half city driving).
Every time I changed a vehicle to Amsoil I also went with there Amsoil air filters (4 years, or 100K) cleanable filters. (1.) How reliable are these standard air filters in the car for keeping dirt out and is there a mileage they should be changed at? (2.)Do you have any recommendations of HOW to change the air filter and what air filter to change to since I am changing over to Amsoil? (3.) Is there any reason not to change over to Amsoil with this motor type?
Sunday, June 12th, 2011 AT 4:55 AM