another useless oil thread

[mistertears]

op, I commute 74 miles a day on weekdays to work in my 09 Z; I don't race on the weekends. I haven't had any oil issues thus far and run a PL14610 filter and 0w-40 mobil 1 full synthetic; the engine warms up smoother and faster than with 5w-30, while oil temps remain below 220 unless with spirited driving in the summer. However, I took a 1.5mpg hit when changing to 0w-40. I change oil and filter every 6-7k. Hope that helps.