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International Automotive Technicians Network
Re: ISUZU NPR with Diesel
Posted to HD/Fleet Forum on 6/28/2025

For as long as I've seen and worked on these things, they end up cracking piston rings and eventually pistons, trashing the bores at high miles. First sign is extreme lube oil use.

ARI (Holman), can be an ordeal. If you can work strictly online with them, it... Login to read more.