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What type and weight Valvoline oil do you recommend for a rebuilt 1974 Pontiac 400 cubic inch engine in a warm climate?
Wiki User
∙ 16y ago
5W-30/10W-30 is pretty much the standard for oil viscosity in most car engines. I personally wouldn't use 5W-30 because it is too light. 10W-30 is the all around general oil viscous enough for hot and cold temps. After an engine rebuild, you may want to run the engine and change the oil after a few hours of running. Then with new oil, run it for the normal intervals of 3 month/3000 miles. Some manufacturers put different oil in the new cars and require you to leave it in for their stated period of time in order to fulfill the break-in requirements. You don't want to use synthetic to break in because this can inhibit the engine's internal parts from breaking in(i.e. rings etc). Good luck!
Wiki User
∙ 16y ago
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