Sludge under valve covers

[Otto]

So I went to change the valve cover gaskets because had a small leak, when I removed the valve covers discovered sludge bulit up in some locations 1/4 inch thick. If it looks like this under the valve covers, can't picture what it looks like inside the engine. I bought the truck with 56,000 miles and immediatly switched to moble 1 oil. I am wondering what I can do to dissolve the sludge in th engine without causing damage. I don't want to clug up any openings by loosing up the sludge. I am wondering if there is any product that will completely dissolve sludge small enough to pass small openings and flush out the drain plug. Anybody have any suggestions?

[Joe_Black]

Mobil-1 will get rid of that over a short period of time, so not to worry. Just be very diligent with your oil and filter changes. Whenever I get a high-mileage vehicle and switch it to Mobil-1 I'll do a "short" oil and filter change at 1500 - 2000 miles.

[Otto]

I bought the truck with 56000 miles and now it has 82500 miles, I assumed by now it would be cleaner then what I saw. Changed oil every 5000 miles. I was surprized to see that much sludge.

[JHarris1385]

While on this subject and just a yes if possible will do. I would like to switch to Mobil full synthetic. Im running normal oil in there right now as far as i know. Not had the VX for more than a month. The question is could I just drain old oil and then put new oil in? Is there any other proceedures i need to do before transferring to the new oil?......5x30right? southern indiana climate...

[Chopper]

10/30 is probably a better choice in an older engine. Just swap juice and filter like usual.

[JHarris1385]

its a 2000 with 40,000 miles so 10/30 mobil 1?