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Oil Weight - 945t 900

I changed the oil in my '93 945t over the weekend using Mobil 1 5w30. I had been running 10w30 through the summer and figured the majority of the heat had passed in Detroit. When I logged the change in the service book, I noted that Volvo is recommending 10w30 for temperatures above 68. It will likely be below 80, but certainly above 68 for much of September. Am I paranoid to be concerned? The car has 95,000 miles, and wasn't leaking with 10w30 synthetic, so I figured 5w30 might offer better cold weather performance and slightly better mpg. Any comments?
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New Oil Weight - 945t [900]
posted by  romulus  on Mon Sep 19 01:27 CST 2005 >


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