The aircraft had a 296USG ferry tank installed at Tracy CA according to the 337 form (record of major repair or alteration) which you can access through the FAA website.
That would give it a range of about 3400nm.
Headwinds to strong to get to KHNL direct? Really?
I know buggar all about Merlins but I know enough about ferrying to know that 296 US gallons ain't going to give it or anything like it 3400nm range. That thing would require close attention to HW component to make it to
PHNL from the West Coast.