Stop leak is a temporary fix and causes long lasting problems. It is a necessary evil that can get you home and buy you some time. However it always plugs up things that need to flow like heater cores and oil coolers.
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02 Saturn L200 5 speed- 265k miles
84 Gmc 6.5 na diesel K30 4x4, TMU
2006 Lincoln Navigator, 215k miles
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