2014 Buick Verano T, 6100 miles, M1 High Mileage 10w40

Joined
Oct 1, 2010
Messages
8,285
Location
Michigan
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Despite my misgivings about the low KV100 of M1 High Mileage 10w40, it did OK on the same interval as M1 5w40 European Car Formula. Fuel dilution continues to trend down, even as I have continued to run E85 fuel blends. End of OCI viscosity has stayed safely in the 30 range, which was the major reason for me to switch to 40-grades. Iron and Aluminum wear metals are same as previous UOA. The new oil fill is M1 5w40 ECF, and I feel comfortable enough now to run 7500 miles OCI on it.
 
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