2002 dodge 4.7 Engine sludge
i have read alot of people using seafoam
my 03 gets the white milky deposits on the cap as well, i switched to synthetic and it helped out alot but i since switched back to conventional oil.
I have read that the 4.7l suffers from a small oil pump which creates a lot of the milky issue. If you are able to get a bigger pump it helps out alot. This is what i have seen done on alot of the performance 4.7l that have been tweaked to max potential. I cant find the forum i was reading where i found out about this information. So who knows how reliable it is.
The other thing that wipes out these motors is the loooong timing chain that wears the guides down till the piston smacks a valve......