Originally Posted by Brian553
Originally Posted by 1978elcamino
5w30 to 10w40 in the 5.0 after warranty, why? to see if it will get rid of the typewriter tick
The coyote specs 5w50 when put in the Mustang GT. Wanna try a 15w40 at least?
I thought about it, being 5w20 is what Ford specs I plan on working my way there one oil change at a time. Last OC was PP 5w30, dident make a bit of difference in the way the engine sounded vs the factory fill. I bought a T6 5w40 2.5 gallon for the next change to try out, (10 qt's required) I hope folks dont get to worried, here in Tampa we never see cold temps.