Asking about penetrating oil is about like discussing religion or politics.. something to avoid..
But you may want to try Kroil, PB blaster, or CRC Knock'er loose...

If you heat a wheel it's wise to remove the tire first, or ensure there is a large hole in them.
Research "tire pyrolysis explosion".
https://www.labour.gov.on.ca/english/hs/pubs/alerts/a34.php

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-