My over-polished IS300 daily & track car - Page 4 - Lexus IS Forum
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post #46 of 51 (permalink) Old 05-22-2019, 02:54 PM
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If you're an experienced driver I'd highly recommend an oil cooler!! I just did my first event at COTA this past weekend. Running brand new 5w-30 full synthetic and my oil temps were about as high as I'd go.. I didn't push the car very hard (beginner HPDE driver) and I still broke 260f temps.
260F oil temps aren't that bad. I'd worry when you hit 300. My E36M3 would hit 300 on hot days. 200F is too low. 220F is enough to boil off water and fuel contamination in the oil. Even with 300F oil, the water temps were around 190ish.

Track usage wears the oil out 4 times faster than normal driving so, you might want to step up your change interval if you're tracking regularly. I used to change mine every other track weekend.
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post #47 of 51 (permalink) Old 05-22-2019, 03:47 PM
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I believe he meant 200f water, which is what I see. I also change oil every other track day. accidentally did 3 in 2 weeks last time since i didn't have time but oil levels were still good and the oil wasn't that bad. I'm ready for two more again

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post #48 of 51 (permalink) Old 05-24-2019, 07:45 AM Thread Starter
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If you're an experienced driver I'd highly recommend an oil cooler!! I just did my first event at COTA this past weekend. Running brand new 5w-30 full synthetic and my oil temps were about as high as I'd go.. I didn't push the car very hard (beginner HPDE driver) and I still broke 260f temps.
260F oil temps aren't that bad. I'd worry when you hit 300. My E36M3 would hit 300 on hot days. 200F is too low. 220F is enough to boil off water and fuel contamination in the oil. Even with 300F oil, the water temps were around 190ish.

Track usage wears the oil out 4 times faster than normal driving so, you might want to step up your change interval if you're tracking regularly. I used to change mine every other track weekend.
I change mine every 5k on the street, and every 3 or so track days. I don't even count autocross as wear on anything except tires and brake pads/fluid.

I and a couple guys i track with do a big "fluid swap" at the start of every year, brake fluid, engine, trans, clutch hdyro, diff, coolant check and power steering (I'm the only one with hydraulic anymore, damn modern electric systems being service free) we will also do brakes again half way thru the year. Done pretty well so far aside from shearing that spindle, which I have to take some responsibility for.

My car also runs at 195 since I did the head, it was 205 before that. I run about 30% coolant to water with water wetter and have a csf aluminum rad. Fingers crossed the old thing survives COTA on June lol

02 IS300 MSM 5 Spd LSD

2005 Lotus Elise Touring

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post #49 of 51 (permalink) Old 05-24-2019, 08:25 AM
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Originally Posted by silver-lexi02 View Post
I change mine every 5k on the street, and every 3 or so track days. I don't even count autocross as wear on anything except tires and brake pads/fluid.

I and a couple guys i track with do a big "fluid swap" at the start of every year, brake fluid, engine, trans, clutch hdyro, diff, coolant check and power steering (I'm the only one with hydraulic anymore, damn modern electric systems being service free) we will also do brakes again half way thru the year. Done pretty well so far aside from shearing that spindle, which I have to take some responsibility for.

My car also runs at 195 since I did the head, it was 205 before that. I run about 30% coolant to water with water wetter and have a csf aluminum rad. Fingers crossed the old thing survives COTA on June lol
What day and group are you running? I'm in the process of piecing together an oil cooling kit now, hoping to have the car ready and sign up for an event mid-June

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post #50 of 51 (permalink) Old 05-25-2019, 08:37 AM Thread Starter
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Originally Posted by silver-lexi02 View Post
I change mine every 5k on the street, and every 3 or so track days. I don't even count autocross as wear on anything except tires and brake pads/fluid.

I and a couple guys i track with do a big "fluid swap" at the start of every year, brake fluid, engine, trans, clutch hdyro, diff, coolant check and power steering (I'm the only one with hydraulic anymore, damn modern electric systems being service free) we will also do brakes again half way thru the year. Done pretty well so far aside from shearing that spindle, which I have to take some responsibility for.

My car also runs at 195 since I did the head, it was 205 before that. I run about 30% coolant to water with water wetter and have a csf aluminum rad. Fingers crossed the old thing survives COTA on June lol
What day and group are you running? I'm in the process of piecing together an oil cooling kit now, hoping to have the car ready and sign up for an event mid-June
I'll be running with scca the 29th and 30th in the TT run group, we'resharing the event with club race so We can afford it. Our event filled up within 10 minutes of reg opening since space was so limited

Good luck out there, I'm also interested to know what components you're using for the oil cooler, I will eventually need one
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post #51 of 51 (permalink) Old 05-31-2019, 12:58 AM
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I like the ideal of the volume control on the steering wheel, I just started playing with shifting with those buttons after having my 01 for about 14 years lol
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