Originally Posted by Cujet
Originally Posted by jharmon203
Originally Posted by WyrTwister
Do as you wish , your money .
I am going ~ 3000 on dino oil and 5000 - 5500 on synthetic . Cheap insurance , when compared to the total cost of ownership .
I respect your decision, but what if you are buying insurance you do not need. The trends on my engine are wearing just fine with longer oil changes. Plus, I get the benefit of the oil analysis.
The error is in thinking a UOA displays the wear rate. Nothing could be further from the truth.
Furthermore, a good number of the 3.5 EB engines are have timing chain problems at 90-100K miles. This is due to significant particulate matter in the oil, lack of sufficient viscosity and evaporated fuel byproducts. The test for fuel dilution does not determine how much fuel has evaporated from your oil, leaving behind components that are not oil. The fix is about $4K. Or you can simply choose a quality synthetic of sufficient viscosity and change it ever 5K and expect 200K+ miles.
Lets use Cujets post an a more general truth which we all should know is each engine and each engines use should determine the oil change interval . UOAs are for how the oil is holding up. Thickening .thinning Ph etc.