Quote:
Originally Posted by Charles Bronson
Every 5k or so right now on our 2 year old 4Runner. I need to do a used oil analysis to see how quickly the 0W-20 falls out of grade. That's my primary gauge on how often to change oil. My guess is the data will tell me around 5k to 6K miles.
10K with changes is too long in my opinion. Toyotas have historically had sludge issues with extended oil changes. The 6.6 QT capacity of the 4.0L V6 might help fight this issue though.
I do find it funny that Toyota says every 10K miles so as long as they're paying the bill with the first two free changes, but then wants you back every 5k miles once out of free maintenance.
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Not sure what you mean about the inconsistent service recommendation; the manual and our dealer have always been clear on 10k. I did the first early - at 5k - because I am OCD.
Sludging is an old issue. It isn’t going to happen today without serious neglect by the owner, and definitely not with 10k changes on modern synthetic oils. That being said I am sure someone can find someone or post a photo purporting serious sludging. My money is on the manufacturer’s R&D, not internet rumors.