Can you add a 20/50 oil to 4 qts. of 10/40 when changing the oil? 225k miles.
What is your question?
A mechanic said he adds 1 qt. of 20/50 to 10/40 when he changes oil. I asked about the "no Zink" in the new oil not good for older engines. I've used 10/40 for many years, now. Do you think this is a good idea?
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Good stuff!!
I have dixie chopper , thats required , thats what i use The lucas 15 40 diesel oil...awesome stuff..