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Old 02-14-2008, 10:25 PM
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Hatterasguy Hatterasguy is offline
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Join Date: Nov 2002
Location: Milford, CT
Posts: 19,318
I change mine every fall before my car goes into storage for 4-6 months. Just because thats how I have always winterized boats so I carried it over to the SDL. I figure that the 603 isn't much different then a diesel in a boat.

If I didn't store the car I would probably just change them at whatever mileage the FSM indicates.
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