Choosing the Right Engine Oil for High-Mileage Diesels
As diesel engines age past 100,000–150,000 miles (or far more for heavy-duty platforms), clearances widen, deposits build, and operating conditions often shift from “like new” to “well-used but still strong.” The right oil choice can stabilize consumption, protect a tired turbo, and keep aftertreatment happy. Here’s how to pick wisely. 1) Start with the spec,…