The mechanic, known for his practical advice on reducing motoring expenses and preventing costly damage, suggests using a re-sealing additive for cars with oil leaks to revive worn-out rubber seals.

An oil leak from the main seal, also known as the rear crankshaft seal, will usually drip from where the transmission connects to the engine, though it may show up elsewhere, such as on the oil pan.

It came as only a mild surprise when my wife’s friend and co-worker, Angie, dropped off her family’s Jeep Cherokee to look at a substantial oil leak ... a Red Seal-certified Automotive ...