Best Oil for hot climate...
 

I know this was probably asked on another topic, but my case its a little bit different. I live in Argentina, this is the first Turbo GT86 down here. Where i live its hot... almost all year. Summer we get temps up to 110F and constant 100F for almost 4 months. Winter is a breeze, no less than 50F on a quite cold day.

I do travel with the car to colder regions for track days or road trips, but maybe a couple of times a year.

Also, this car will be seing a lot of track action.

99% decided on using Motul 300 and changing oil every 3-4 track events or 5-7k km. Question is, 0w30?10w40? too many options... would like some advice =)

thanks!

Before oil selection, you should invest in an oil cooler. Once you have that, i would probably start with a 30 weight oil and see what your pressures look like during a track session.

Motul 300v is a good choice, but they don't make it in 0w30.

sorry forgot to mention. alredy have an oil cooler. As far as checking the oil pressure, never did that...

We have almost the same hot temps weatherwise. I use 30w oil Royal Purple to be exact, and have no complaints. During track sessions, when oil temps reach around 115-120C, oil pressures drop to about 3 bar at redline, which is quite alarming coming from 6bar at normal oil temps. Because of this, I do not want to try 20w oil. I also have an oil cooler.

see here this guy summaries it pretty well

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[ame="https://www.youtube.com/watch?feature=player_embedded&v=cDfFJ5s6IDg"]FRS - BRZ Oil Pressure and Temperature Tech FA20 - YouTube[/ame]

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His data below, you want to stay out of the low 40psi range at high rpm.

You can monitor oil temps with stock sensor with torque or obd device, but for pressure you will need to install aftermarket sensor.



STREET TEMPS
0W20 Redline

0w20 Redline 185F @ 800RPM 10PSI Oil Pressure
0w20 Redline 185F @ 2000RPM 35PSI Oil Pressure
0w20 Redline 185F @ 4000RPM 54PSI Oil Pressure
0w20 Redline 185F @ 7000RPM 65PSI Oil Pressure

10W30 Redline

10w30 Redline 185F @ 800RPM 19PSI Oil Pressure
10w30 Redline 185F @ 2000RPM 51PSI Oil Pressure
10w30 Redline 185F @ 4000RPM 65PSI Oil Pressure
10w30 Redline 185F @ 7000RPM 83PSI Oil Pressure

10W40 Redline

10w40 Redline 185F @ 800RPM 25PSI Oil Pressure
10w40 Redline 185F @ 2000RPM 64PSI Oil Pressure
10w40 Redline 185F @ 4000RPM 78PSI Oil Pressure
10w40 Redline 185F @ 7000RPM 91PSI Oil Pressure


TRACK TEMPS AFTER 9 LAPS @ 1 Minute 15 Seconds Per Lap
0W20 Redline

0w20 Redline 225F @ 800RPM 7PSI Oil Pressure
0w20 Redline 225F @ 2000RPM 30PSI Oil Pressure
0w20 Redline 225F @ 4000RPM 48PSI Oil Pressure
0w20 Redline 225F @ 7000RPM 43PSI Oil Pressure


10W30 Redline

10w30 Redline 245F @ 800RPM 7PSI Oil Pressure
10w30 Redline 245F @ 2000RPM 35PSI Oil Pressure
10w30 Redline 245F @ 4000RPM 52PSI Oil Pressure
10w30 Redline 245F @ 7000RPM 46PSI Oil Pressure

10W40 Redline (12 Laps)

10w40 Redline 265F @ 800RPM 8PSI Oil Pressure
10w40 Redline 265F @ 2000RPM 31PSI Oil Pressure
10w40 Redline 265F @ 4000RPM 55PSI Oil Pressure
10w40 Redline 265F @ 7000RPM 45PSI Oil Pressure

@steve99 thanks for the video, very good info. Probably going for a 10w40 since its going to get a little bit colder in the next months. But in the summer, ill might consider 15w50 or something like that.

I think Eneos Sustina is generally the best, but not sure about specifically hot climates.