Hi All,
I know there are a zillion oil threads, and if this one is repetitive, just tell me where to go....
I've asked so many gear heads: When you switched to full synthetic on an old car, did you extend the recommended 5K oil change interval?
It finally dawned on me...HERE in 1st generation was THE place to ask. So my '06 HL Limited always had 5K conventional changes, I moved her a blend, now to full synthetic....should I stretch the interval to 6K, 7K....or more?
What did you do...and what, if anything, did you notice??

Thanks!

I know there are a zillion oil threads, and if this one is repetitive, just tell me where to go....
I've asked so many gear heads: When you switched to full synthetic on an old car, did you extend the recommended 5K oil change interval?
It finally dawned on me...HERE in 1st generation was THE place to ask. So my '06 HL Limited always had 5K conventional changes, I moved her a blend, now to full synthetic....should I stretch the interval to 6K, 7K....or more?
What did you do...and what, if anything, did you notice??
Thanks!