★★★★★ 5
Great stuff
Seemed to work as well as or better than some more expensive catalytic converter cleaners. I put it in while at 1/3 tank and my Check Engine light went out almost immediately once I started driving. My Tundra has almost 230,000 miles and still runs great but was getting a little harder to start after I switched from full synthetic oil to conventional. I’ll never do that again and immediately switched back but the damage was done. Check engine light came on and I had to crank longer to get it started. Adding this Liquid Moly fixed both issues temporarily. I have to wonder if this was used regularly, say every 3 months, if it would clean the catalytic converter more permanently?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025
:max_bytes(150000):strip_icc()/benefits-of-glutathione-89457_final-01-502464fe91b2444285b0cccf8cb0a33c.png "9 Health Benefits of Glutathione")
