How much oil damage was done?
 

I did a light lapping day on fresh synthetic oil, but even with a 25 row oil cooler was seeing peak oil temps between 250-270 degrees. I am changing the oil and am going to send it off for analysis. The oil (and filter) will have less than 500 miles on it, most of which was driving to/from the track.

What do you think?

U will be fine I sustain 260 all the time at the track and k change the oil after 2-3 track days

I'm not so sure. I'm hearing bearing degradation once you go above 240 degrees for period of time. 260 to 270 sounds like danger zone. You have probably done damage to bearings already.

What oil, in for the report

I already made a vote.. but what constitutes 'light lapping'? how many sessions? and what brand/type of oil?

If there is bearing degradation past 240 then my engine should blow by now and will be in trouble soon lol. With 34 row cooler and stock cooler my engine oil runs up to 260 at the track. Ran about 35+ track days w 20-25 min sessions. Car has 27k miles right now.
Plan is do run one more oil cooler and try to bring temps down to 220-240 on hot laps

I am going to say its going to blow up soon, get extended warranty ready................ Jk

Might as well just throw it away now.


On a more serious note, if the car did not go into limp mode, you should be fine. Since you're changing the oil anyway there shouldn't be any issues.

Castrol Syntec
"Light Lapping" = running about 6 to 7/10's on street tires. For reference my personal best on that track is 1:21 in a stock Miata (I don't track the Porsche). I was running 1:25-1:27 in the Z....definitely not pushing it at all.
"How many Sessions" = open lapping, maybe 100 miles on track, no more than 25 minutes at a time and usually ran no more than 2 or 3 laps once oil temps went over 250.

The car never went into limp mode. My vote was for "no issue" on my poll, but given what appears to be some hysteria relating to the Z oil temps I was interested to see what the track guys thought the results would be. Haven't gotten the results back yet, but I have been surprised before.

I got 3 track days and 15 autox and 2500 city miles on my oil. Somehow the engine is staying intact

Lets check in at 30 to 40K mark on your motors that run into 260 range. My motor felt like it was running great too! However I had opportunity to have it torn down at fairly low miles too. Rarely saw over 240 usually and a couple of spikes to 260. ...It wasnt pretty. Had it failed? ... no. but lots of scoring. I'll take word from guys building these motors that what seems to be moderate oil temps can impact surface of crank bearings. Those temps in higher range start process to early bearing failure.

Want to talk about what higher than stock RPMs (8000) can do to VQ heads? I know about that too. LOL! I was a doubter too until I saw the damage first hand. I had total of 30 minutes running time with 8000 RPM redline in short 2 minute hillclimbs and AX.

Honestly if I stuck with stock VQ i'd probably limit my track work based on what I have seen on my low mile motor.

only way to stay under 240 temps in oil is to run dual cooler, maybe 1 34 row and 1 19 row.... that's my plan soon but if there's already damage who cares, LS time then huh?

Or a man size oil cooler like mine.

not sure what cooler you have but the 72 row one? no thanks not willing cover my radiator with that!

Shows us your man cooler Shovel :icon18:

It's almost the size of the radiator, and not as thick, but way more area covered than a 72 or dual oil coolers

I'll do the honor

AE Oil cooler
 

Since were on the subject of oil coolers. Im running a pitiful 24 row. I know , too small. I was told by someone at Stillen (when I first got the car) that it would be perfect for racing. Im now running 4.08 gears on an automatic, running higher revs and oil temp at an alarming temp. My question is

Is a 34 row going to be good enough ? or

Run a 34 row with a fan on it ? or

screw it, buy that huge AE cooler and call it a day.

Also , Ive got the upgraded CSF radiator ill put in at the same time.

Anyone please chime in.

And Ill also need to install a diff cooler.

Probably cheaper to add a second 25 row

what about loss of pressure running two oil coolers ?

I have a 34 row, and have only got it above 220 degrees a couple times.

I doubt you would have a pressure drop running a double cooler, but I don't know for sure. If you're worried about that sort of thing run an Accusump system. There is such a thing as over kill, and I've heard some people having issues with it. I haven't ran into this so this is just hear say.

Air ducting for the any of the coolers is something to look into as well if that hasn't been brought up yet.

The majority had it correct. Not the best report format I've seen, but it gets the job done.

What the F is this? Not Blackstone?

Air oil seperator and water cooled oil cooler.

Blackstone is one of many companies that test oil. At work work we use Polaris. We sample weekly on equipment. Some equipment holds 2 pints, others holds 7,000 gallons. We have used blackstone in the past, but.....

Lots of companies test oil. This is a local heavy equipment place so I thought I would give it a shot. Probably go back to L&N or Blackstone in the future though because I like the report formats better.

Here is a great forum if you really want to get into motor oil.
Bob Is The Oil Guy - Forums powered by UBB.threads™