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What weight oil do you use in a 4.3L engine?

The recommended oil weight for a 4.3L engine may vary depending on the specific vehicle and climate conditions. However, in general, a 5W-30 or 10W-30 oil is commonly used for 4.3L engines.

It's always best to consult the owner's manual or maintenance guide for your specific vehicle to determine the correct oil weight and viscosity requirements. The manufacturer's recommendations will provide the optimal oil weight for your engine based on factors such as temperature range, engine design, and performance specifications.