Oil will do no good as it cannot really get there to the threads.
An allen with 3/8th socket so you can use a regular ratchet... The do the pre-load on the wrench as I suggested above and "ring" the bolt with hammer taps... A "deadblow" hammer is best for this.
It cracks the loctite bond.
Loctite is simply super glue aka:cyanoacrelate in predetermined max strength...
Brent
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