I just bought a 2003 MSP... so i have a few questions, being new to mazda. What oil filter is most recommended? Spark plugs? and i was reading the maneul, and i was a little confused on the oil. Does it really take 3.4qts? im used to 5qts!.. also, 5-30 or 10-30 is recommended? the mods on this car is a Injn cold air intake, hks blow off valve, hard piping to the intercooler, air to fuel ratio, and boost gage, and greddy boost controller(havent touched it) boost is set at 10psi.. Anyways.. let me know on those questions.. so far awesome car!