hd oils have special additives to fight acid and moisture. They have additives to suspend soot and have cleaners to fight dirt.. They suspend particles, they dont turn to wax and sludge.They have heavy wear additives that dont come into play unless a part gets hot, then they coat it. They have friction modifiers that increase mpg. They do not break down viscosity. They do not separate and vent off the thin portions and thicken like cheap oils.
NO modern engine needs an oil change sooner than 7500 miles with a good oil.. Any sooner and your simply wasting the oil and the additives. The extreme base additive will fight acid and moisture, both of which cause you to change early.
simply said.. if your changing before 7500 miles you wasting resources, money, and your time. HD diesel oils now go 10,000 miles between changes and have enough left over that they will still be adequate if you miss a change.
Moral of story.. run a decent hd oil, and move to a 7500 minimum and 10,000 mile change. I buy the better oils and moved everything to a 10k change. But then I am only getting 225k on my gas engines before I sell them and move on.
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Today's Featured Article - Restoration Story: 1964 JD 2010 Dsl - Part 2 - by Jim Nielsen. Despite having to disassemble the majority of my John Deere 2010's diesel engine, I was still hopeful I could leave the engine-complete with crankshaft and camshaft-in the tractor. This would make the whole engine rebuild job much easier-and much less expensive! I soon found however, that the #4 conrod bearing had disintegrated, taking with it chunks of the crankshaft journal. As a resul
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