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I use the RPM ranging method. Gotta have some time on your hands though but it works well. Run the truck for around 30 min at 1500 rpmRun the truck for around 30 min at 2500 rpmgo up in 1000 rpm increments until your running it around 4500 rpm for roughly 15 min'sThis will give the engine that range of rpm's that it will probably see daily and will break everything in with increments.
Do you run with a load (driving down the road) or just revving the engine in the garage?
I've always followed the same basic things for all my engines, 22r, hybrid 20/22, 3,4L, V8, etc...1. No towing for 5000ish miles.2. No high speeds, 55-60 should be ok3. Vary the RPMs, don't take it easy, but don't be too rough. Give it some good revs occasionally.4. Use good oil.As for viscosity, I'm not sure what you guys typically use in CO, but 10W-30 or 20-50 should be ok, just don't want it to freeze up ..There's my
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