attrapereves
New member
You only changed the oil twice in 34,000 miles? At that rate....I would have my doubts about hitting 300k.
With mostly highway driving and using synthetic, oil can last past 10,000mi.
In my old Corolla using Mobil 1 5w30 full-syn, I sent in a sample to Blackstone that had 7,000 miles on it. I'd say about 75% of those were highway miles. The report indicated that the oil could go at least another 5,000mi.
Being an anal person, I usually changed it around the 8,000mi mark. With my Sonic, I will probably just rely on the oil life meter.