I thought Ford recommended 5-20W.
My ’88 2.9 and my ’93, 5.0 both called for 5-20 and my latest 03 Ranger 3.0calls for 5-20.
I had a garage do an oil chg and the tappets were singing when I went in to pick it up and the shop owner said they were that way when it came in , NOT !
When asked he said he used 10-30 and when I asked him to chg it to 5-20 he did without any argument.
The tappets quieted down shortly there after, so now that is all I use, although now I use 5-20 Mobile 1.
Does your Ford Manual call for 10-30 weight oil ?
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter