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Old 04-26-2017, 11:31 AM   #1
face2
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Join Date: Apr 2017
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Engine oil weight/outdoor temperatures

I have been running 20W 50W Castrol in my 97 Villager because I remember a mechanic said it was better in reducing wear (long term), and would maintain lubrication better in the hot climate of Hemet, Ca. I now want to use something thinner, possibly synthetic for better gas mileage. I have 233,000 miles on the engine with this oil. Is it dangerous to switch to a synthetic now after using conventional that long? He also told me Walmarts' Supertech is just as good as Castrol?
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