6o4o, I had a similar story to yours, my city gas mileaged bumped from a constant approximate 16.5 mpg with Castrol GTX to a constant approximate 18.2 mpg with Castrol High Mileage. I got 27 mpg on the highway going 70 mph, but never did any highway driving with Castrol GTX so I cannot compare it, but the car is rated for 25 mpg highway.
high mileage oils???
- Thread starter tsmay51
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