Oil sample taken for Blackstone oil analysis.
Easy.
Amsoil engine oil change, including swap to Donaldson filter vice EA026.
OK
Restrictor removal in filter head.
Really easy.
Swapped oil lines to filter head.
What a PITA!
Note: Took before and after temperature measurements of each filter as it was, and then after the filter change/restrictor removal/line swap. Will post temperature results in Amsoil thread, hopefully tomorrow. Hint: there's a big difference.
Note: When changing both filters, the rubber gasket from the old filters remained in the filter head assembly. I didn't notice this until I had almost fully installed both (filled with fresh oil) new filters. I can't even imagine the mess and potential engine disaster the could have happened.
Herb