Car has 78,000 hard driven miles.It is taken to road race events, this sample represents 16 hours of track use(4200 RPM to 6000RPM at 280F+) The data(which represents 7 years) is listed from newest sample on the left to progressively older data. First data set(Rl 10W-40),Second data set(Rl 10W-40)third data set(Rl 10w-40),fourth data set(RL 10w40),fifth data set (RL 10w-40),sixth data set (RL 10w-30), seventh data set(Amsoil 10w-30 + red bottle Valvoline Synpower), eighth data set(Amsoil 5w-30); Most recent analysis used an Amsoil EAO23 filter(which had been in use thru the last 3 years, 8000 miles, when I dissected it, after having replaced it for this oil change, there was no sludge, very little debris within the pleats, it looked like it had not yet reached its service life). Data sets three thru eight performed by Analytics Inc, Data set one and two performed by Oil Analysers. 3 quarts of RL 20W-50 were added during the 2800 mile change interval, which explains the slightly elevated viscosity.
Oil Analysers flagged the oxidation as severely high and nitration as moderately high, but Dave at Redline says these are normal readings for ester based oils and to ignore it. They also flagged the Nickel and Tin as elevated. I should note that for at least 6 track hours, the engine endured a horrible misfire and was only hitting on 7 cylinders(which has been cured!) I routinely use MMO. I have switched to Redline 20W-50 for this upcoming year.
FE 29.…..24.....26.....33.....30.……..49..….36.....94
CR 2.…...1....…2......3....…2..……...2....…..2......5
NI 9.…….4......2......3......2...……….5...…...7.....18
AL 9.…….8.....16.....6.....9...……….13..…..9......34
PB 38.…..22.....25....35...25..………58...….39.....111
CU 9.……6......8......8......7...……….7...…..7......15
SN 7.……7......23.....23.....6...……..15...…..6......21
SI 24.…..28.....45.....81.....34..…….18..…..16.....30
B 11.……12.....23.....41.....20..…….28...…136.....3
NA 29.…20.....37.....33.....32..……...37...…16.....28
K 0.….4...... MO 824...821....965....908...726.……695....…231....11
P 1164...1086....1056..1145..1049.….1303...1348...1309
ZN 1377..1323...1509...1564...1170...1803...1589...1968
CA 2828..2734...3417...3502...2633...3605...2796...3554
MG 13.…..13.....28...….30.…...27.…...254....837....427
Mil 2800...3000...2200...2000...3800...3000...3100...6000
Fuel T/S% H20 VIS 15.4 15.0 14.5... 14.3.. .16.3...12.1.. .13.5. ..12.8
TBN 4.24..4.82
OXI 85..72
NIT 24...23
Oil Analysers flagged the oxidation as severely high and nitration as moderately high, but Dave at Redline says these are normal readings for ester based oils and to ignore it. They also flagged the Nickel and Tin as elevated. I should note that for at least 6 track hours, the engine endured a horrible misfire and was only hitting on 7 cylinders(which has been cured!) I routinely use MMO. I have switched to Redline 20W-50 for this upcoming year.
FE 29.…..24.....26.....33.....30.……..49..….36.....94
CR 2.…...1....…2......3....…2..……...2....…..2......5
NI 9.…….4......2......3......2...……….5...…...7.....18
AL 9.…….8.....16.....6.....9...……….13..…..9......34
PB 38.…..22.....25....35...25..………58...….39.....111
CU 9.……6......8......8......7...……….7...…..7......15
SN 7.……7......23.....23.....6...……..15...…..6......21
SI 24.…..28.....45.....81.....34..…….18..…..16.....30
B 11.……12.....23.....41.....20..…….28...…136.....3
NA 29.…20.....37.....33.....32..……...37...…16.....28
K 0.….4...... MO 824...821....965....908...726.……695....…231....11
P 1164...1086....1056..1145..1049.….1303...1348...1309
ZN 1377..1323...1509...1564...1170...1803...1589...1968
CA 2828..2734...3417...3502...2633...3605...2796...3554
MG 13.…..13.....28...….30.…...27.…...254....837....427
Mil 2800...3000...2200...2000...3800...3000...3100...6000
Fuel T/S% H20 VIS 15.4 15.0 14.5... 14.3.. .16.3...12.1.. .13.5. ..12.8
TBN 4.24..4.82
OXI 85..72
NIT 24...23