Q: Q: Engine Problem

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My 2007 Camry a month ago, I had oil leak, then radiator breaks, and now the engine light shows up. Took it to a mechanic and he said that it's misfiring because of low pressure in 2 of the 4 valves. I am wondering if it's worth rebuilding or should I go with adding additives for a temporary fix and trade in the car.

My car has 90500 miles.
My car has an automatic transmission.

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