best way to fix that sludge is this...

1.) go to some place cheap and get a case of DIRT cheap oil... and a case of dirt cheap auto trans fluid... and 4 new filter

2.) then buy a few gallon of rotela 15w-40 diesel oil

3.) drain your oil... and change the filter... (you might want to prime the filter at this time)

4.) then fill the engine with half cheap oil, half trans fluid

5.) let the engine run for 15 mins

6.) drain oil

6.) repeat steps 3-6

7.) repeat step 3

8.) fill with cheap oil

9.) run for 15 mins

10.) drain oil

11.) replace filter and prime with Rotela 15w-40 oil

12.) fill engine with Rotela 15w-40 oil...

you will never have that problem AGAIN

 

fill the block full of diesel let it set 2 or 3 days and drain fill with oil run for five min or so and change the oil again

 

Hot Oil Flush.