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I think it's mechanical cause it came with the plastic tube to run to the oil line., I'm gonna see if Vdubya63 calls me so when can test out his autometer, if not I'm gonna get one soon.
Thanks alot guys, I love this new forum, no flaming on Turbo Noobies! Woot!
UPDATE: I just popped the hood and looked at the plastic tube that runs from the guage to the T fitting, and there is no oil in the plastic tube...there should be some in there right???