不一定，石头车上价钱好，两个都换了；可以试一试这个，维持接着开，经常开开高速

https://www.amazon.com/Liqui-Moly-Catalytic-Injection-Combustion/dp/B07Z54MBQ3/ref=sr_1_3?crid=1TNBID0373DQM&dib=eyJ2IjoiMSJ9.gmtRPXzoEm-uRnRuB3h0Pyya9ILm5eNbEJH2dHLh7sZPhqWAlW74Oc3duEl1ELeesCPwbd8YhTNwOna4cStMxFYvLLPhwJ3Eh8daQ6li4wQBlHgwiVtI2FpyBtIsLcpiuoyso6Qh17VDKNN1L_BwzNicB8j3SH-MY01nchpfBgVxQFTAJe_u2iGQyakxONBZZ1GVxxChHvInaTMo8Cn1knYWmX3yHCZXCv4ZpznOVTTtGJViV3ZMOu6Vvnvb-K_mUDhyxB6VRWUjbECWnhASKifeoopeZOnAS3b1MObGDAE.mHynuTZfq8COnbcxEG0xyPJ7GmijgNr97VZxPAGWoPM&dib_tag=se&keywords=clean+catalytic+convert&qid=1720049812&sprefix=clean+cat%2Caps%2C130&sr=8-3