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i use to put full syn in my focus (mobil 1). but i had that since it was new, and i drove it pretty hard. the full syn did have a good feel to it, and i noticed a difference as soon as i switched from the early miles on the car.
with my new car (in sig) i have almost 97,000 miles on it, so i've been putting high mileage in it since 89,000 (when i got it). i always heard that putting full syn in a car that never had it into high miles that it might leak. or maybe next time i will switch to full syn?
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