Usually, before I get Lola going after hibernating for the winter, I change the oil. I moved last fall and Lola has been sleeping under her carport. As I get ready to wake her up, I realize she is parked on an incline. (Rear  higher). Not a steep incline, but enough for a ball to roll. Would it be ok to change as is, or should I move to level ground, or a least switch directions? (Rear lower)

Thanks!

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