I have an 05 expedition 5.4L 3v 190k miles. we use it for mainly hauling stuff now. Drive mabe 2 time a week. Its does have the common phaser noise. when it fully warm up, at cold start I couldnt heard the phaser noise , I dont plan on fix it since the truck not worth any money, anyway the truck been running super mobil 5000 5w20 + FL820s most of it life, no leak, no burn oil or anything, I never have to add any oil during 6 month oil change. It does have a check engine light on and off because bank 2 02 sensor need replace.
Well I figure it had many miles now, mabe going 5w30, because since my local walmart mobil 5000 5w20 out off stock all the time. and mobil 5000 5w30 easy to find. after oil change , no more check engine light, the truck does feel sluggy a bit, gas miles still the same, for the noise its reduce just a bit.
should I change it back to mobil 5000 5w20, I dont know if this engine picky about oil grade or not. any different on cold start between 5w20 and 5w30 ? will 5w30 cause engine damage by going 10 grade above recommend . thanks
Well I figure it had many miles now, mabe going 5w30, because since my local walmart mobil 5000 5w20 out off stock all the time. and mobil 5000 5w30 easy to find. after oil change , no more check engine light, the truck does feel sluggy a bit, gas miles still the same, for the noise its reduce just a bit.
should I change it back to mobil 5000 5w20, I dont know if this engine picky about oil grade or not. any different on cold start between 5w20 and 5w30 ? will 5w30 cause engine damage by going 10 grade above recommend . thanks