I dont like switching brands of oil. it just dont seem right. if you have a high mileage car, and you want it to last longer, the least you can do is stick to one motor oil.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.