I was just curious why ford uses 5w30 in the 4.0 and 5w20 in everything else...
I am now using 5w30 in all my 4.6 engines they seem to run a lot quieter and smoother... I will be going to an engine rebuilders meeting for a couple of classes on Monday and there will be a gm rep a ford rep and a nissan rep there lets see what they have to say i will also ask all the other engine guys what weight they use and i will report back on monday nite
I am now using 5w30 in all my 4.6 engines they seem to run a lot quieter and smoother... I will be going to an engine rebuilders meeting for a couple of classes on Monday and there will be a gm rep a ford rep and a nissan rep there lets see what they have to say i will also ask all the other engine guys what weight they use and i will report back on monday nite