i run castrol gtx 10w30 in all my vehicles w/ toyota or napa gold filters
use to run valvoline 10w30 in my silverado and corolla...change oil light came on every 3k miles
ran castrol gtx and now change oil light comes on at 4,500 miles
oil pressure with valvoline started at 60psi hot engine new oil and then 45psi hot engine with 3k miles on oil
oil pressure with castrol gtx started at 60psi hot engine new oil and then still the same 60psi hot engine wih 4.5k miles on oil
use to run valvoline 10w30 in my silverado and corolla...change oil light came on every 3k miles
ran castrol gtx and now change oil light comes on at 4,500 miles
oil pressure with valvoline started at 60psi hot engine new oil and then 45psi hot engine with 3k miles on oil
oil pressure with castrol gtx started at 60psi hot engine new oil and then still the same 60psi hot engine wih 4.5k miles on oil