Plugs are iridium. 100k interval under normal condition. So 90k would be about right buy OEM or NGK which makes OEM.
if you are talking about Valoline Full Synthetic ATF+4
then
Quote

# Meets Mopar Standard MS-9602
# Meets Mopar Type 7176«
# Meets Mopar ATF +2« Type 7176
# Meets Mopar ATF +3
# Meets Mopar ATF +4

Doesn't say anything meeting SP-III standard so it's only a guess and not in its favor whether it would work.

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