My friend did one drain and fill on 2006 Toyota Sequoia with 200k miles and used Valvoline Maxlife and not Toyota WS. He's only driven it about 15 miles since doing it. It now has delayed engagement from a dead stop. Any recommendations on next steps? Stick with Maxlife or go back to WS? If procedure is to do more repeat drain and fills, how many more and how many miles in between?