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  1. 5.0L Talk
    Hi, I have an stock 1987 5.0 mustang gt. My last oil change i used royal purple 10-30. That was about 3 months ago, i checked my oil today and i was very very low... This hasn't happened in the past with penzoil. I dont seem to have a leak, does royal purple burn faster in 5.0's? what oil do you...
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