Sludge under valve covers

[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?

[IndianaVX]

jharris,
i would tell you to do as joe mentioned, in your situation. after changing to full syn. change oiil, and filter again in 1000 to 1500 miles. this should "clean" the old oil outta there. im a hoosier also. started with the 10-30, but im running 5/30 now.
take it easy
david

[IndianaVX]

jharris,
one more thing, i replace one quart of oil with a quart of lucas synthetic oil stabizer. so, 4 qts of oil, and 1qt of stabilizer. some people poo poo this product, but im a beliver in it.

[Tone]

Use a quart of engine oil flush avail at any autoparts store before you drain the oil - follow directions, do not drive with this in. I run a qt of diesel through before every other oil change as it is cheaper and accomplishes the same thing. You might want to do it every time you change your oil to clean away the excess. sludge.