I think Tom Bryant recomends 5-30 synthetic. I'm running 5w40 Rotella synthetic in my car. I just did a 600 mile round tip, and probably burned about a quart of oil. I was running pretty hard though, doing 75 to 80 mph. Even with the oil seperator, I think a large part of it is going into the intake. I'm planning on stuffing it with some steel wool.
Average mpg was 34. Not bad for cruising as fast as I was. I would expect I would get 36 or better if I was going 60 to 65.
Jason
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