I like Redline oil. I have a 2005 V6 Toyota Tacoma, & have used Amsoil,Mobil,Eneros,Valvoline,Castrol oils & nothing has quieted the exhaust ticking better than Redline.I get better drivabilty & quieter engine operation & less starter amperage draw than any other oil I've used. At about $9 a quart I'd like to know who else is using Redline & what differences have you felt in your vehicle verses other brand oils?