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nobody will ever agree... but I have a new Malibu with over 200k miles always using Mobil 1. runs perfect and often went over 10k miles no problem but now it uses a quart of oil every 3-5,000 miles.
not sure if it would make a difference but in hindsight... I will change every 5k miles. oil is cheap
and it's not so much the oil its the filter... even the Mobil 1 filters I believe are rated for 7500 miles.
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