replace ford 5w20 to 5w30 on high miles mod 5.3l 3v engine ?
I heard ford made 5w20 just for gas miles, not for longevity of car engine, is this true ? some say replace 20 weight for 30 weight on these modular engine is better and reduce some engine noise.
I heard ford made 5w20 just for gas miles, not for longevity of car engine, is this true ? some say replace 20 weight for 30 weight on these modular engine is better and reduce some engine noise.