I do it on every one that I can, especially diesel tractors. Slant 6 is impossible, but they're indestructible anyway, so no big whoop.

Big Blocks I don't do, either, for obvious reasons

and, my 318, I usually just wet the media rather than fill it, due to where it is on the block and the fun getting to it in a 4x4 Power Wagon...:)

BUT...my Avenger, Hemi Ram, heck yeah...easy as they come, just as well, certainly doesn't hurt anything, so really...why not?

JS

76 Dodge Adventurer Sport Power Wagon W100 318, 727, NP203 Fulltime 4x4 Russet Red
06 Jeep Commander Ltd 4x4, 5.7L Hemi, QuadraDrive II
06 Chrysler 300C AWD 5.7L Hemi
10 Mopar 10 Challenger R/T, #483/500, 5.7L HEMI
10 Jeep Grand Cherokee Ltd 4x4 5.7L HEMI
11 Dodge Ram 1500 LoneStar Quad Cab, 5.7L HEMI, Fulltime 4x4, Deep Cherry Red
16 Jeep Cherokee Limited 3.2L Pentastar V6, 9 Speed Torqueflite, 4x4, Black