You get sudge from not changing the opil cuz it will break down and when it does it leaves a sludge deposir so that's why you should really never wait to change your oil ever . It like your blood you couldn't live with sludgei n your system could you ?
PS: AND yes Penziol is notorious ofr not having much of a life span . I just used some of the Max Life and noticed a much better performance after using it .
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