Howdy!
If it's Sunday afternoon, and you're attempting to install OL 8.2 in UEFI mode:
error: ../../grub-core/loader/i386/efi/linux.c:197:Can't read kernel /images/preboot/vmlinuz.
error ../../grub-core/loader/i386/efi/linux.c:93:you need to load the kernel first.
or perhaps you see the following with legacy BIOS (MBR):
Failed to load ldlinux.c32
Boot failed: press a key to retry...
... then the problem might simply be that you need a larger USB stick.
Many of the free tools available to copy an ISO to USB "call home", which is yet another reason I simply use the following:
$ sudo dd if=/Users/dude/Desktop/V996906-01.iso of=/dev/disk4 bs=1m
Which, btw, requires Oracle Linux 6 update 6 (6.6) or later.
This, unfortunately, does not produce an error if the image does not fit on the drive.
When you download the OL 8.2 installation ISO from the Oracle Software Delivery Cloud (aka e-delivery)
(https://blogs.oracle.com/linux/how-to-download-oracle-linux-iso-images )
It shows the image is 7.8 GB:

After downloading, however, the size comes closer to 8.3 GB.

The file checks out A-OK:
$ openssl dgst -sha256 /Users/bb/Downloads/V996906-01.iso
SHA256(/Users/dude/Downloads/V996906-01.iso)= 67568941e976efb26a3d61cdbf98c5a46cd0b3463ec750992f305eee20957a6e
It is the same as shown in the digest of the file download page.
So, go figure! OL 8.2 marks the end of my favorite 8GB USB stick.
Toodeloo!