Dump a can of seafoam (or 3/4) in your crankcase for 200 miles.
will get your engines insides like new
I have done it on my car with impressive results. The oil comes out BLACK.
I have brought my engine back to mint condition by seafoaming, and by adding it to the crank.
The previous owner abused the engine and it was partially sludged. Now I have it perfectly clean again. I can feel it running better. I did a 600 Mile oil change, with seafoaming it, and now the internals are like new. The oil from the dipstick is golden yellow again, and it comes out cleaner after 3000.
I know some people will be against this, but it truly worked wonders on my car.
When had my valve covers done, it was super clean inside as well