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In that case I'd consider the annual oil change a preventative measure, unless you use an oil analysis program. Reason, combustion products that make it past the rings and into the crankcase can become corrosives over time. Without at least once a month running of the engine, water can also develop in the oil due to condensation, especially in coastal areas like yours. This water will mix with the combustion products over time and cause the corrosive to develop. Alternately drive your Saab, mon and make this a moot point. :lol:
