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please excuse my ignorance, but i always thought that one of the main reasons for the viscosity recommended for a particular car was based on the clearances. so my concern is on a cold start, say with temps between 30 – 40 degrees at the lowest, how much longer does it take for the thicker oils to get to the vital areas? or is there no difference, unless your starting your viper at 0 degrees, which i don’t do.