So I received back UOA's from Blackstone on 2 factory fills, a 2015 Juke (1.6L DI, turbo and egr) and a 2015 Altima (2.5L 4cyl port injected no egr).
Factory recommendation for both is 0w-20 for mileage, but 5w-30 conventional (mineral) old will keep warranty intact. On the juke this has changed since 2013, where my factory manual for that one (same engine) recommended 5w-30 only.
Anyway, the Juke had 1426 miles on it, the Altima 660. These are both factory fill cSt viscositys, so I assume they had put a 0w-20 weight as FF.
The Altima came back at 6.42 cSt, the Juke at 5.91. Now I've only been doing UOAs for a couple years now, but I know I've NEVER seen numbers this low, even for all the 5w-20 I've used in Fords and Camry and whatnot. The Juke also suffered from 1.5% fuel dilution, which makes sense because those break-in miles were all around town stuff, maybe 2 hard canyon runs on it, that was it.
Just finished the second oil change on the Juke after a 2200 mile roadtrip, and got a sample of that to see what it looks like, figuring the all road trip will have at least stopped the fuel dilution from showing up.
I know the Juke destroys oil, because I UOAed the last one several times as I increased oil weights and quality trying to keep it from shearing it down. Haven't gone back to sample the Altima, it has 19K on it now, but I'll get one here in a week and know what it is doing to 5w-30 semi-syn because that's what I've been using in it.
Interestingly, in neither comment section of the Blackstone UOA did the author comment on the oil viscosity. They have on all past UOAs done on the old Juke, but no mention of whether or not a 5.91 cSt @100 is a disaster or what.
Juke will stay at 5w/10w-30 semi-syn the rest of summer, and come winter will get 5w-30 Ultra which has both a good pourpoint and is on the light side of a 30w. And then we'll see how that works out for shearing, and fuel dilution, but that is next summer's exercise.
Factory recommendation for both is 0w-20 for mileage, but 5w-30 conventional (mineral) old will keep warranty intact. On the juke this has changed since 2013, where my factory manual for that one (same engine) recommended 5w-30 only.
Anyway, the Juke had 1426 miles on it, the Altima 660. These are both factory fill cSt viscositys, so I assume they had put a 0w-20 weight as FF.
The Altima came back at 6.42 cSt, the Juke at 5.91. Now I've only been doing UOAs for a couple years now, but I know I've NEVER seen numbers this low, even for all the 5w-20 I've used in Fords and Camry and whatnot. The Juke also suffered from 1.5% fuel dilution, which makes sense because those break-in miles were all around town stuff, maybe 2 hard canyon runs on it, that was it.
Just finished the second oil change on the Juke after a 2200 mile roadtrip, and got a sample of that to see what it looks like, figuring the all road trip will have at least stopped the fuel dilution from showing up.
I know the Juke destroys oil, because I UOAed the last one several times as I increased oil weights and quality trying to keep it from shearing it down. Haven't gone back to sample the Altima, it has 19K on it now, but I'll get one here in a week and know what it is doing to 5w-30 semi-syn because that's what I've been using in it.
Interestingly, in neither comment section of the Blackstone UOA did the author comment on the oil viscosity. They have on all past UOAs done on the old Juke, but no mention of whether or not a 5.91 cSt @100 is a disaster or what.
Juke will stay at 5w/10w-30 semi-syn the rest of summer, and come winter will get 5w-30 Ultra which has both a good pourpoint and is on the light side of a 30w. And then we'll see how that works out for shearing, and fuel dilution, but that is next summer's exercise.
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