03 Lexus, 5873mi, Amsoil Signature 5W-30

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This one is pretty boring. Since I drive so few miles, I only change the oil on this vehicle once a year - this year I only went 5,873 miles in a single year. Looks pretty good to me, I could have gone longer.
 
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Good figures, but I really can't understand why Blackstone comments are always in favour of extending the OCI. The TAN and TBN are almost the same, so the oil was changed at the correct OCI.
 
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Good metal wear rates. Used oil is still in serviceable condition , OCI could have been extended further .. to say, 8-10K miles. Btw,were 3 previous samples Amsoil SS 5W30 too?
 

btanchors

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All samples in the UOAs above are Amsoil SS 5w-30. I've gotten in the habit of changing the oil in this vehicle once a year - but I think I have established even once a year is too often.
 
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Originally Posted By: btanchors
All samples in the UOAs above are Amsoil SS 5w-30. I've gotten in the habit of changing the oil in this vehicle once a year - but I think I have established even once a year is too often.
Thanks, mate. At current OCI, a blend or some kind of minerals would be more than adequate for the role , IMHO.
 
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