smug Since new always used Moble 1 and did all oil/filter changes myself. 1ZZFE is a noisy thing. Its noisy on start up and then when warm is quieter @115k miles. Retired now no longer driving 10-12K miles yearly. More like stop n go around town...5K miles yearly. Rotella might be better oil with the HD additives than Mobil 1 I've heard. Quieter, better stop n go protection. Anyone using Rottela T6 ? I think i give it try. See if quieter.