It's my guess that the origional oil is just plain oil. In any event-all modern oils can effectively break in vehicles. In the old days rings needed hundreds of miles to seat. Those days are gone. If your vehicle uses no oil and you were careful during your first couple thousand miles, you are home free. I changed to Mobil 1 at 30 miles. 2300 miles later the oil is so light I can barely see it. It has used zero oil. I plan on changing every 7500 miles. I would switch to syn and save lots of oil changes.
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Plain Jane Cappuccino SE
with AutoTrans
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Plain Jane Cappuccino SE
with AutoTrans