i have 92kmiles on my taco and have been running mobile 1 syn 5w30 sind i bought it at 52k miles. i changed the oil to valvoline durablend 10w30 (for summer) and i cant tell much of a difference. the motor however doenst have that mobile 1 "ticking" and other motor noises. the motor is quieter and cant tell a difference in performance. seems to be slightly more responsive.. ill keep driving and report back. i may swithc to the 5w30 and see what happens. after a while illl run mobil 1 again to see if there really was that big of a difference.. oh and i saved 15$ or more

 

sounds good