Yes, same HT/HS as 502 00.IS12 1.8 engine probably didn't need fancy oil tricks to hit that SULEV g/km target. 504 oils for the motors with stricter cats are still fairly thick too.
Yes, same HT/HS as 502 00.IS12 1.8 engine probably didn't need fancy oil tricks to hit that SULEV g/km target. 504 oils for the motors with stricter cats are still fairly thick too.
Can you explain why stop-start would affect that?Didn't the switch to 508 happen at the same time these cars got auto start-stop? Because that would definitely explain it
Yep, 504 30s are just shy of the 502 40s that are barely 40s anyway. Same HTHS specification (3.5).IS12 1.8 engine probably didn't need fancy oil tricks to hit that SULEV g/km target. 504 oils for the motors with stricter cats are still fairly thick too.
Ya I think there was a gap with the GTIs too where start/stop came out a model year before the switch to 508. Doesnt start-stop typically want a thinner oil though? It's at least something to considerNo, it's for the SULEV classification. My R does not have that, it *does* have start-stop (disabled of course), and it's specced for vw504/502.
Ya I think there was a gap with the GTIs too where start/stop came out a model year before the switch to 508. Doesnt start-stop typically want a thinner oil though? It's at least something to consider
Can you explain why stop-start would affect that?
Hint: all engines need oil that provides sufficient lubrication on start, not just ones that do it at every stop-light.these thinner oils are more likely to have the additives that you would want to have on startup? Like moly and solid film lubricants or w/e. And so should use them for that reason anyways? Hmm.
Ok...but if an engine starts and stops 20x more often over the same amount of time you're going to want to make adjustments for that.Hint: all engines need oil that provides sufficient lubrication on start, not just ones that do it at every stop-light.
Stop/Start is a thing in Europe for a long time. My 2011 BMW 328 has it disabled for the US market.Hmm, you know what, I always see that vehicles with start-stop always use thinner oils so I just have assumed that start-stop requires thinner oils and that's the way it is... but I've never actually thought about why that is. Maybe it's all just an emissions thing and there is actually no good reason.
I guess i assumed it's because the oils would flow faster, and maybe that is part of it, but they also can have anti drain back filters and faster pumps so maybe that's not as much of a factor? But would thicker oil provide a benefit? Like if an engine doesn't have start-stop but then it gets start-stop, would that push the needle more towards requiring higher viscosity or lower viscosity? I would still think it'd push the needle more towards thin but idk.
And the other thing I'm thinking about now is, since thinner oils are used with cars that have start stop more and more these days, regardless of whether that's because it's better for the engine or if it's just a fuel economy thing, either way, would that mean that these thinner oils are more likely to have the additives that you would want to have on startup? Like moly and solid film lubricants or w/e. And so should use them for that reason anyways? Hmm.
Most new engines designed for start stop now have coated bearings. However, if anything, a higher viscosity would seem to be beneficial for start-stop.Ok...but if an engine starts and stops 20x more often over the same amount of time you're going to want to make adjustments for that.
The real question is- if an engine doesn't have start-stop, then the feature is added, all else being equal, does the start-stop feature alone push the needle more towards the engine requiring higher viscosity or lower viscosity?
Because it doesn't have zero effect. It's gonna be one or the other.
....if anything, a higher viscosity would seem to be beneficial for start-stop.