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Hi, This OCI was from 20k to 30k on the engine. The previous OCI was also 0w-40 from 15k-20k. The previous OCI's were PP 0w-20 at 5k each. I switched to 0w40 after noticing the extra half quart being drained each time. My driving habits are 60 miles a day commute with 90% of that being highway...