Changing Viscosity for Summer and for Cleaning?

[CANADADIY]

I'm not sure if I missed it but how many miles on the engine? The previous owner must have gone extremely long between oil changes.

 

[samiamz]

I'm not sure if I missed it but how many miles on the engine? The previous owner must have gone extremely long between oil changes.

60k miles

 

[McRightclick]

60k miles

Must've been about a 60k mile OCI for that amount of sludge haha

 

[wlk]

Engine & timing components had only 65K miles on them. Timing components worked fine prior to tear down. Just had low oil pressure code..which led to the sludge discovery

Timing chain sure but not guides and tensioner. They are wear items, I'd just replace them, just asking to do it again.
Great job on clean-up, VRP 5w30, HPL, Motul X-Clean 5w40, Amsoil SS or even a standard xW40/50 with some Gumout Multisystem Tune Up or Kreen @ 1oz/qt or HPL 40 cleaner ect will clean as well and give you the added visc you are worried about. Even LiquiMoly flush or BG EPR at the end of oci's will do as well

 

[scrllock]

Timing chain sure but not guides and tensioner. They are wear items, I'd just replace them, just asking to do it again.
Great job on clean-up, VRP 5w30, HPL, Motul X-Clean 5w40, Amsoil SS or even a standard xW40/50 with some Gumout Multisystem Tune Up or Kreen @ 1oz/qt or HPL 40 cleaner ect will clean as well and give you the added visc you are worried about. Even LiquiMoly flush or BG EPR at the end of oci's will do as well

Plus the thing that wears chains is soot/debris. That oil was about as dirty as possible, personally if I was gonna tear it down, the timing stuff is the obvious thing to take care of, way, way easier than doing it again on an accelerated timeline.