Raced 94 Corvette LT1-RedLine 10w-40 2200 miles

[sidney004]

Car has 72,200 hard driven miles.It is taken to road race events, this sample represents 13 hours of track use(4200 RPM to 6000RPM at 280F+) The data is listed from newest sample on the left to progressively older data. First data set(Rl 10w-40),second data set(RL 10w40),third data set (RL 10w-40),fourth data set (RL 10w-30), fifth data set(Amsoil 10w-30 + red bottle Valvoline Synpower), sixth data set(Amsoil 5w-30) Amsol EAO23 filter was carried over from last two changes(8000 miles total), changed out for next cycle. Air filter changed from foam to paper.

FE 26.....33.....30.....49.....36.....94
CR 2......3......2......2......2......5
NI 2......3......2......5......7......18
AL 16.....16.....9......13.....9......34
PB 25.....35.....25.....58.....39.....111
CU 8......8......7......7......7......15
SN 23.....23.....6......15.....6......21
SI 45.....81.....34.....18.....16.....30
B 23.....41.....20.....28.....136....3
NA 37.....33.....32.....37.....16.....28
K MO 965....908....726....695....231....11
P 1056...1145...1049...1303...1348...1309
ZN 1509...1564...1170...1803...1589...1968
CA 3417...3502...2633...3605...2796...3554
MG 28.....30.....27.....254....837....427
Miles 2200...2000...3800...3000...3100...6000
Fuel T/S% H20 VIS 14.5...14.3...16.3...12.1...13.5...12.8

Interesting how the Al, Cu and Sn are identical to the last batch, what a coincidence!

 

[sunruh]

what lab did the analysis?

 

[sidney004]

Analysts,Inc. in Oakland, Ca did every UOA.

 

[steve20]

surprised to see the worst readings with Amsoil, even considering the extended OCi. If it were mine, I'd be shortening up the OCI.
I have a 95 with 55K on it that leads a very pampered existence.
Sits in the garage most of the time-at least you are out enjoying yours
Steve

 

[FZ1]

Appears the Amsoil was penalized by 2 prior runs on the oil filter and a foam air filter.

 

[sidney004]

Originally Posted By: FZ1
Appears the Amsoil was penalized by 2 prior runs on the oil filter and a foam air filter.


No it was not, I needed to proof my post more carefully. The oil filter change and foam air filter applys to the most recent UOA; the most recent batch of Redline had the filter in for two runs(which by the way looked fine when I cut it open) and an updated paper air filter(hence the decreased Si.) How do you edit the originalpost anyways? As for shortening the oil change intreval, 2200 miles seems reasonable, at $80 for oil and filter, it is not cost effective for me to change it every event. It is a Chevy not a Ferrari.

 

[FZ1]

I see,thanks.