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Old 07-15-2014, 04:31 PM   #18
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I did a track day back in May, and put fresh Mobil 1 full synthetic 5w30 in. I put maybe another 500 miles (normal street driving) on that oil. I then had a track day last weekend, I changed out the fluid again before the event but went with Pennzoil Ultra 10w30. I figured with the hot Texas summer a thicker oil would probably be a good idea for the track. I am about to send my Mobil 1 off for analysis from my first track event.

I'll probably do new brake fluid soon-ish. I haven't even touched the trans or diff fluid.. probably should do that too.
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Old 07-15-2014, 11:38 PM   #19
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I believe that even the manual states that the diff fluid needs to be changed before tracking the car. I'm using Mobil 1 but plan on upgrading to Redline with my next change.
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Old 07-16-2014, 12:29 AM   #20
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I'm not tring to change anyone's way of doing things but you'd think if oil can last 500 miles in a nascar at elevated temps, hp, and rpm, you'd think you could get more life out of your oil than a couple track days. 24 hrs of la mans, Indy car, formula 1 these guys run oil longer and harder than half the guys who have posted here!
And at the end of those races the engines are torn down and completely rebuilt.
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Old 07-16-2014, 01:49 AM   #21
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And at the end of those races the engines are torn down and completely rebuilt.
Not because their worn out. Or because the oil expired 400 laps in, but because they have the opportunity and funding to check and or replace each component if needed. Most of the parts are reused, it's a buisness.

I'm not saying the oil isn't abused and it's lifespan isnt reduced because it is! heck I use up 10% or more on the oil life meter each track day. But I certainly don't think it needs to be changed each track event. Like I said just my thoughts.
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Old 07-16-2014, 12:08 PM   #22
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I agree, even @ 500 miles thats 3 track days and some change. Assuming people are managing fluid temps properly thats not a big deal but would depend a bit on how much people are driving inbetween as very few, if any, trailer their cars for pure track use.

All those cars get new bearings/rings/springs/etc at each teardown which was my point. I realize many hard parts can be reused but almost all the "wear" parts do get swapped.

I don't trust the oil life meter one bit although that will bring out the insane how dare you not trust the GM engineers crowd. The best degradation model in the world doesn't mean crap when it doesn't know what level of ZDDP the fluid is starting at.
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Old 07-16-2014, 02:19 PM   #23
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I agree, even @ 500 miles thats 3 track days and some change. Assuming people are managing fluid temps properly thats not a big deal but would depend a bit on how much people are driving inbetween as very few, if any, trailer their cars for pure track use.

All those cars get new bearings/rings/springs/etc at each teardown which was my point. I realize many hard parts can be reused but almost all the "wear" parts do get swapped.

I don't trust the oil life meter one bit although that will bring out the insane how dare you not trust the GM engineers crowd. The best degradation model in the world doesn't mean crap when it doesn't know what level of ZDDP the fluid is starting at.
True , the oil life monitor is only good within the perimeters it's designed for. As long as your using an oil to superior to, in the case of the camaro, Mobil1, Then the calculation difference is in your favor. And it's not like I track my car to 0 oil life on the monitor, I don't even get close to that, I don't even use the OLM as a end all be all determination of oil life. I do think it's pretty accurate from what I've seen though. I also beleive people could get more use out of their oil, but if it gives these people peace of mind then who am I to argue.

I used nascar and what not because they are much harder on fluids than us and still put the miles on. Some guys change their oil like they run nascar but they don't run a nascar. Just saying.
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Old 07-16-2014, 04:26 PM   #24
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For daily driving and occasional tracker I agree. But I have zero confidence in its ability to accurately map degradation when operating in the high stress road racing environment as it wasn't designed for that. Especially if oil temps are getting higher than they should. Above 260-275ish and I don't think it really knows whats going on or how shocking older oil with high temps will make it break down faster than usual.
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Old 07-16-2014, 09:31 PM   #25
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average so cal track day

2 mile laps X 15 laps X 4 sessions = decent miles
50-100 miles to and from the track = decent miles
thousand miles on the car from the last track/race day.

Sure seems like time to change fluid to me.

You know a discussion has broken down when someone compares a street driven coupe on track days to a racecar rebuilt after every day.
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Old 07-16-2014, 11:54 PM   #26
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As long as you don't "cook" the oil, you don't need to change oil for every event in my opinion. I used Rotella T6 on my '01 and '06 Z06s and also '12 Grand Sport, and that oil never broke down after even quite a few track days in between oil changes. For my '13 Z06, I did use Mobil 1 0W-40 since GM asked dexos1 for it and that oil would be similar to Mobil1 5W-30, is factory fill for Euro Corvettes, yet provided better protection at the track. It also held up pretty good, but I honestly also had Z07 radiator on the car.
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Old 07-17-2014, 12:16 AM   #27
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Originally Posted by SPCBA View Post
average so cal track day

2 mile laps X 15 laps X 4 sessions = decent miles
50-100 miles to and from the track = decent miles
thousand miles on the car from the last track/race day.

Sure seems like time to change fluid to me.

You know a discussion has broken down when someone compares a street driven coupe on track days to a racecar rebuilt after every day.
1220 miles! 1100 of them street! Guess it's a testament to the true ability of a engine to last so extraordinarily long in a street driven coup doing track days. Oil shoulda been changed and engine rebuilt 720 miles ago. guarantee my engine doesn't look a day older or make any less power than anyone else's here.
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Old 07-17-2014, 12:29 AM   #28
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1220 miles! 1100 of them street! Guess it's a testament to the true ability of a engine to last so extraordinarily long in a street driven coup doing track days. Oil shoulda been changed and engine rebuilt 720 miles ago. guarantee my engine doesn't look a day older or make any less power than anyone else's here.
When you do a track day or two, I suppose you could afford to change all the fluids after every event. When you do start going to a track day every other week, though, you start questioning if it's at all necessary.

GM itself recommends diff fluid change every 24 hours of track driving, but does not have any recommendations on oil change interval as far as I know. Perhaps they trust their oil life meter.

When you look at GT-R, the user manual recommends oil change only twice as often for heavy duty (track day) use, and recommends changing it immediately if you hit 280 degrees (?) or above if I recall correctly. So, there you have it. As long as you don't cook your oil, you don't need any of those crazy change intervals, and I don't see why LS3 would be any different
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Old 07-17-2014, 12:42 AM   #29
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When you do a track day or two, I suppose you could afford to change all the fluids after every event. When you do start going to a track day every other week, though, you start questioning if it's at all necessary.

GM itself recommends diff fluid change every 24 hours of track driving, but does not have any recommendations on oil change interval as far as I know. Perhaps they trust their oil life meter.

When you look at GT-R, the user manual recommends oil change only twice as often for heavy duty (track day) use, and recommends changing it immediately if you hit 280 degrees (?) or above if I recall correctly. So, there you have it. As long as you don't cook your oil, you don't need any of those crazy change intervals, and I don't see why LS3 would be any different
I can agree with that.
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Old 07-17-2014, 01:13 PM   #30
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Originally Posted by X25 View Post
When you do a track day or two, I suppose you could afford to change all the fluids after every event. When you do start going to a track day every other week, though, you start questioning if it's at all necessary.

GM itself recommends diff fluid change every 24 hours of track driving, but does not have any recommendations on oil change interval as far as I know. Perhaps they trust their oil life meter.

When you look at GT-R, the user manual recommends oil change only twice as often for heavy duty (track day) use, and recommends changing it immediately if you hit 280 degrees (?) or above if I recall correctly. So, there you have it. As long as you don't cook your oil, you don't need any of those crazy change intervals, and I don't see why LS3 would be any different
Sounds like the GT-R has a real oil cooler.

Quote:
Originally Posted by nissanusa
Pressurized lubrication system with thermostatically controlled cooling and magnesium oil sump
Otherwise, that twice-as-often OCI recommendation is generally in line with the difference between "normal service" and "severe service" for most cars where both intervals are specified.


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Old 07-17-2014, 01:57 PM   #31
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Sounds like the GT-R has a real oil cooler.


Otherwise, that twice-as-often OCI recommendation is generally in line with the difference between "normal service" and "severe service" for most cars where both intervals are specified.


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And probably also a real oil temp sensor.

I am still not sure how to proceed on keeping the engine cool. I hate having to remove the original cooler to add an extra oil cooler. I'd love to be able to just 'add' a smaller air-cooled oil cooler inline. Alas, I'm thinking about upgrading the radiator with an LG or DeWitts unit first, and see if that helps.

FYI, a potent oil cooler set-up (Setrab 34 row Series 6 with 12-AN lines, a thermostat, and fireflex hose sleeving, etc.) also costs more than $800; quite pricey.
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