Originally Posted by JOD
Originally Posted by BurntMusic
Actually, the MST stands for Mid Saps Technology lol so I guess it wasn't so "mid-SAPS" then? I could have gone the full 10k, but I wanted to have the change right on the 20,000 miles mark just to make things easier to remember.
I'm not too sure about that. Nearly all of it was Valvoline so I would be surprised if .5 quarts changed the viscosity of the entire rest of the oil. Total Quartz Energy 5w40 is definitely on the thicker side of 5w40.
Total Quartz Energy 9000 5w40PDS
I'm not too happy about the viscosity dip, although it's not a big deal either. I'm on dealership bulk oil now so we'll see how well that performs next year. I'm also going to do a VOA for just the valvoline MST and see how that compares to my UOA here.
It's funny though, looking at the spec sheet it's barely mid-saps, and it's LL04 rated. For some reason though it's 502/505 vs 504/507. Not even sure what parameters don't meet low saps on this oil?
As far as the viscosity dip, it's almost certainly a small amount of fuel dilution. Blackstone doesn't test for this, they just estimate based on viscosity. On the UOA's I did on this engine, there was always some fuel present. Honestly, I think that's probably the best reason not to go too crazy w/the OCI.
They did specifically state there was no measurable amount of fuel in the oil