Drivers regularly see high oil temperatures completely stock and even higher on modified examples. In testing, CSF observed temperatures over 275°F (135°C) on the track, and it was clear the FL5 needed a solution. The engineering team set out to develop CSF's first ever complete engine oil cooler kit, and the results speak for themselves. CSF's new engine oil cooler kit is the "Real Deal" with stunning performance and an aggressive look to match.
Key Features:
Two Dual Pass High-Performance Oil Coolers
CPE lined stainless steel braided lines
DYME Pro/Spec Quick Release Fittings
Billet Sandwich Plate with 175-195°F (80-90°C) Thermostat
Oil Temperature reduction of up to ~15°F (~8°C)
Carbon Fiber Bumper Vents
Laser cut mounting brackets
Approximately 7 Quarts (6.6L) overall oil capacity
Pair with the CSF #7221 FL5 Performance Radiator for maximum cooling performance
CSF spent over a year in testing and development of this kit working with R&D Partners and multiple drivers competing in Global Time Attack (GTA) and GridLife. Initial testing was performed in the controlled environment of a dyno. CSF then moved into aggressive real world testing and development on the track where most customers would be using these kits.
Tested and used by Honda Racing Corporation USA (HRC) on their Honda Civic Type R Rally XP car.
Pressure Drop
When adding an engine oil cooler to a car that did not come with one from the factory, there is always a concern with pressure drop. This is due to the back pressure imposed on the system from running the oil through lines and cooling channels of an oil cooler.
In testing, CSF observed a small drop in oil pressure after installing the kit. While not a concern for casual driving, it was enough of an issue to address for those tracking their FL5s. To resolve this issue, CSF and test vehicles switched to a higher weight oil (from OE Spec 0W-20 to 0/5W-30) and this relieved the potential pressure issues.
Metric
Stock with 0W-20 Oil
CSF with 0W-20 Oil
CSF with 0/5W-30
Idle Operating Temp
20 PSI (1.4 Bar)
15-17 PSI (1.0-1.2 Bar)
20 PSI (1.4 Bar)
On Track - Straight
70 PSI (4.8 Bar)
50 PSI (3.4 Bar)
67-69 PSI (4.6-4.8 Bar)
On Track - Corners
59 PSI (4.1 Bar)
47 PSI (3.2 Bar)
56 PSI (3.9 Bar)
Highway Cruising
75 PSI (5.2 Bar)
55 PSI (3.8 Bar)
70 PSI (4.8 Bar)
CSF recommends the following oil weights depending on application:
Light Track Duty and/or High Performance Street: 0/5W-30
Heavy Track Duty and/or Dedicated Race Builds: 0/5W-40
