Simple dipstick test reveals engine-killing problems in 5 seconds, spotting coolant leaks and oil contamination before ...

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Avoid costly mechanic scams like $150 air filter markups while addressing serious coolant leaks that cause $7,000 engine failures.

The mechanic shows that the plastic safety tab holding the cap on the jug has a sharp, blade-like edge. If you flip the cap over, you can pierce the foil with this tool. But there’s more. The little ...