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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ |
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04-10-2022, 05:27 AM | #72 | |
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I too agree that a functional HTHS (after shearing of the oil) is fine for track days with a cooler or with stock power in this application. |
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04-11-2022, 06:59 PM | #73 | |
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04-11-2022, 08:27 PM | #74 |
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04-12-2022, 12:11 AM | #75 | |
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04-23-2022, 01:48 AM | #76 |
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04-23-2022, 12:33 PM | #77 |
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Just to add a datapoint here... dyno plot with oil temp (at sump) and pressure. This was with fresh Amsoil Signature Series (Synthetic) 0w-20. Ambient temps in the lower 50s. Sump temps were ~15 degrees lower than dash indicated temp.
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04-24-2022, 02:58 AM | #78 | |
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04-24-2022, 09:07 AM | #79 | |
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It's just not practical unless you have an engine on an engine dyno on a test stand. It's likely be done, but that data isn't available, which brings up another point. How do you know if temps at those locations are normal or not? There's no normal operational data out there to go off. What would be the coarse of action if you did see a temperature you felt was too high, but the OEM sensor was within normal? Assume that's OK, or there's an issue? I'm all for more data, but it's a tricky rabbit hole. The sump is a standard location for measuring oil temps (what going into the engine) in motorsports. Not that measuring in the pump is bad; it's certainly better than nothing. As another note, there is speculation that Subaru skews this temp through the ECU to project higher temps on purpose. Some have speculated to be on the conservative side of safety? Maybe it's a cheap sensor? Ours are lab grade and get calibrated at each use. Whatever the reason, we'll continue to monitor this over time. Maybe with higher ambient temps that delta decreases? IDK, we're just here to share information |
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04-24-2022, 10:09 AM | #80 | |
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As a person who entirely relies on OEM sensors - thinking through I would not expect the sensor to be accurate but rather be consistent, at the very least there is a point of reference to work with.
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05-11-2022, 07:26 AM | #81 |
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So I *finally* managed to get 5w30 rock oil competition (major distributor in poland screwed me over by claiming they have 20L in stock while in reality they only had 1L and I had to wait until last friday for remaining 5L bottle). My initial observation is that idle and low load temps are better (similar to 0w20 I had before) while high load temps seem to be about the same as that 10w50. "On paper" it looks fine. Though OEM gauge still shows about 118 deg C on my way to work (245 F) but this oil advertises 3.7 HSTS in 5w30 variant so I believe it should be fine even for daily use at those temps. Especially if OEM shows higher temps as KillerBMotorsport mentioned, it sounds safe.
Though what was quite interesting to me - engine is noticeably louder and sounds harsher than with 10w50. I already noticed that when changing from 0w20 to 10w50 (back then I noticed it feels softer) but now changing back to 5w30 just confirmed my initial impressions. I don't think it's good or bad but I was just a bit surprised by fact that such minor thing as oil may affect engine vibrations and sound. But since oil directly affects resistance of parts movement it kinda makes sense I guess. Well... at least due to this hardcore delay in delivery I managed to make 3k km already (1800 miles) on that 10w50 oil so it wasn't entirely wasted purchase xD |
05-11-2022, 07:31 AM | #82 |
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All those correction can be takien into account by ECU. Just like speed governor and other things. If OEM shows reliably 20 deg diff it's not rocket science to factor it in. Knowing what manufacturers tend to do for user "safety" I'm really likely to believe it's true that OEM shows too high readings to scare driver so that he doesn't damage engine even if he isn't really aware what temps are safe.
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05-11-2022, 09:43 AM | #83 |
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Our ecu with oem calibration doesn t even take any kind of action against oil temperaturr, you could have 160 celsius and the ecu wouldn t care and keep providing the timings as if it were at 80 celsius
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05-11-2022, 10:23 AM | #84 | |
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Might be worth trying a couple of different brands. High quality brands of course. |
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oil, oil change, track build |
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