The wear metals difference is going to be mostly that my report is from a 2,200 mile interval, and his is from a 3,500 mile interval. So we would expect him to have accumulated more wear metals than I did during that time. Interestingly though, my oil "suffered" slightly more than his during my shorter interval, coming out with lower viscosity, and a lower flashpoint even though we used the same brand/type of oil. Probably harsher environment and/or driving.
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