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Tracking / Autocross / HPDE / Drifting What these cars were built for!


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Old 11-25-2015, 03:14 AM   #57
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... and I still am tracking with 0W-20 and don't plan on changing soon.
I think I might flip over to 5W-30 on my next change, but at this point it's going to be due to cost as I can't really get much lower than $50-$60 a change on Eneos...
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Old 01-20-2017, 12:01 AM   #58
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If I am interpreting this correctly, the oil cooler reduction in temperature appears to be balanced against the pressure drop of adding the cooling system?

Or is the interpretation that we are using an imperfect proxy (pressure) as an indication for film strength, thus lower temp oil at the same pressure has better lubrication.

In both 5-30 cases, the pressures seem to be the same albeit at lower temps.
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Old 01-20-2017, 04:13 AM   #59
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If I am interpreting this correctly, the oil cooler reduction in temperature appears to be balanced against the pressure drop of adding the cooling system?

Or is the interpretation that we are using an imperfect proxy (pressure) as an indication for film strength, thus lower temp oil at the same pressure has better lubrication.

In both 5-30 cases, the pressures seem to be the same albeit at lower temps.

You are correct but it depends on the type and setup of the oil cooler. I'm using a Kraftwerks adapter (no thermostat) with Mishimoto lines and cooler. I did this specifically to reduce the pressure drop through the oil cooling system. I also run 5w-40 Motul 300V. I also have a Koyo radiator to complete the engine cooling. The only think better would be a vented hood.

Most people are looking at the pressure as film strength even though it doesn't really work that way.
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Old 01-22-2017, 05:15 PM   #60
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For a stock na fa20 what is the best recommended oil? Currently running amsoil 0w20. I was told to switch to 0w30 from amsoil... I see everyone talking about 5w30 here tho. Any downsides on going with 0w30? Will be running a forestor oil cooler btw bone stock motor.
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Old 01-23-2017, 10:00 AM   #61
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For a stock na fa20 what is the best recommended oil? Currently running amsoil 0w20. I was told to switch to 0w30 from amsoil... I see everyone talking about 5w30 here tho. Any downsides on going with 0w30? Will be running a forestor oil cooler btw bone stock motor.
Unless you're seeing elevated operating temperatures (track days in hot climates) there's no need to change from 0W20. It works just fine, but when you change the operating conditions beyond what the factory engineers designed around (like when you race or track your car) then it's worth considering a different oil weight.
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Old 01-23-2017, 06:42 PM   #62
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Unless you're seeing elevated operating temperatures (track days in hot climates) there's no need to change from 0W20. It works just fine, but when you change the operating conditions beyond what the factory engineers designed around (like when you race or track your car) then it's worth considering a different oil weight.
Sorry forgot to mention, I will be tracking the car.On saturday I went and was keeping tabs on my temps, only got it to 220 degrees but I wasn't even pushing it (stayed in 3rd and 4th short shifting).

I'll be doing more than a handful of track days this summer so I want to make sure the car is reliable. Possibly doing hood vents too while I'm at it.
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Old 01-23-2017, 10:37 PM   #63
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Originally Posted by TRAKRAVN View Post
You are correct but it depends on the type and setup of the oil cooler. I'm using a Kraftwerks adapter (no thermostat) with Mishimoto lines and cooler. I did this specifically to reduce the pressure drop through the oil cooling system. I also run 5w-40 Motul 300V. I also have a Koyo radiator to complete the engine cooling. The only think better would be a vented hood.
Thanks for that. I am leaning towards a custom solution now as well. The mishimoto is a little overkill for my application (mostly just circuit) with 19 rows. I am thinking something 10 or less rows to reduce the pressure drop and then staying with 5-30.

In this test how many rows was the cooler?
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Old 01-23-2017, 11:40 PM   #64
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Thanks for that. I am leaning towards a custom solution now as well. The mishimoto is a little overkill for my application (mostly just circuit) with 19 rows. I am thinking something 10 or less rows to reduce the pressure drop and then staying with 5-30.

In this test how many rows was the cooler?
Also please keep in mind most of the pressure drop comes from having the restriction of the thermostat. Without the thermostat -10 or -8 lines will be more then enough through just about any size cooler you want to use. The larger the cooler the less pressure drop there is. The pressure drop comes from the resistance of oil flow. Try to avoid banjo fittings as well and use the angled AN fittings where possible. I was constantly getting leaks from the mishimoto thermostat plate with banjo bolts so I ditched the whole setup for the Kraftwerks adapter with straight AN fittings.
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Old 01-23-2017, 11:57 PM   #65
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Try to avoid banjo fittings as well and use the angled AN fittings where possible. I was constantly getting leaks from the mishimoto thermostat plate with banjo bolts so I ditched the whole setup for the Kraftwerks adapter with straight AN fittings.
Are the fittings universal? i.e. same thread etc. I might retain a thermostat regardless as it's not that much more expensive.

As for pressure drop, you sure the bigger one is lower pressure drop?

Also, does anyone know if the oil cooler line is upstream or downstream of the filter (i.e. cool, then filter, or filter then cool). I assume ideally it should be filter then cool, but might be wrong.
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Old 01-24-2017, 02:59 PM   #66
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Yes the mishmoto kit uses standard -10 fittings.

The Kraftwerks adapter I used had -8 outlets. So I had to get a -8 to -10 adapter.

From my data and personal observation the greater the flow of the cooler the less pressure drop there was. This goes the same for intercooler cores. Fluid is fluid.

I believe the oil travels through the outside of the filter and exits through the center. That would mean the oil travels to the cooler first then to the filter.
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Old 01-25-2017, 08:41 AM   #67
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I believe the oil travels through the outside of the filter and exits through the center. That would mean the oil travels to the cooler first then to the filter.
That's correct.
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Old 01-25-2017, 01:58 PM   #68
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How come 5w30 didnt show higher oil temps than 0w20 in the first comparison?

I am not planning to install an oil cooler due to warranty purposes for now and debating between 0w20 and 5w30. I'd expect going to 5w30 without adding extra cooling would increase oil temps even more, which kind of beats the purpose???
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Old 01-25-2017, 02:03 PM   #69
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How come 5w30 didnt show higher oil temps than 0w20 in the first comparison?

I am not planning to install an oil cooler due to warranty purposes for now and debating between 0w20 and 5w30. I'd expect going to 5w30 without adding extra cooling would increase oil temps even more, which kind of beats the purpose???
Oil pressure.
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Old 01-25-2017, 03:06 PM   #70
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How come 5w30 didnt show higher oil temps than 0w20 in the first comparison?
It was within a few degrees, I'd consider that a normal variance between two sessions. If you were to average several sessions together that gap would likely disappear.
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