Q&A

 Enthusiast

whose lifetime? compare the cost of a flush to replacing the tranny. usually these things work well during the warranty period, then the dealer/mfg. want to make money on repairs. extended oilchange periods ie. 5000 miles or mor usually lead to degraded oil and damaged rings. same with extened tranmission interval changes. you are safer to change your tranny oil every 60,000 miles, especially if you are living in a severe hot or cold climate.