Hello all, haven't been on this forum in quite a while. 5 years into owning my 99' C230K, and it's still running strong despite having 265k miles (426k km) and withstanding Southern California 120F (48c) summers. For the first 2 years I owned the car, I always changed the oil with Mobil 1 10w40 high mileage blend but the last 2 oil changes, I switched back to 0w40 because the 10w40 was difficult to find for a while and I was curious if the engine would run any better using the oil it's...
Another Oil Debate 10w40 vs 0w40 in Warm Climate/High Mileage C230K?
Another Oil Debate 10w40 vs 0w40 in Warm Climate/High Mileage C230K?
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