How much oil damage was done?

cossie1600 · 09-16-2013, 02:10 PM

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

Shamu · 09-19-2013, 02:50 PM

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.

View Poll Results: How much damage was done to the oil
Pretty severve thermal break-down and viscosity change	3	9.68%
Light thermal break-down and viscosity change	6	19.35%
Oil will test fine, no need to change it	22	70.97%
Voters: 31. You may not vote on this poll

09-19-2013, 02:50 PM	#2 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 20	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. clintfocus likes this. __________________ Grant Last edited by Shamu; 09-19-2013 at 02:55 PM.

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09-16-2013, 02:10 PM	#1 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	I got 3 track days and 15 autox and 2500 city miles on my oil. Somehow the engine is staying intact