Just came back from an extended 25 day vacation drove my 08 Impala SS V8. Tried Royal Purple in this vehicle for first time, ran very smooth and did not shear. Hiway mpg worked out (on paper) to 27.2 mpg, car has a fuel management/ displacement on demand feature and it worked great. Used my Drivers information display to fine tune it for longer run time in 4 cyl mode, for example when speed limit was 75 (but most drive around 80) I would check the readout and at 80 mph it was in 8 cyl mode and give me an instant mpg reading of say 24 mpg, then by slowing to say 78 mph it would stay in 4 cyl mode for the given road and altitude/wind condition and give me and instant reading of 31 mpg.
Ran the oil to 9,140 miles, OLM was at 12% snd sump was over 1/2 qt low so instead of adding oil, I changed it. Last post was using Synpower and a 1 yr oci, and things improved during my longer hiway run. This car has a factory oil cooler which may add to the copper reading. Oil sample was from the Fram xtended guard oil filter which the oil tech punched a hole in. here is my Blackstone report:
GM 5.3L 327 v8 28,220 miles on unit
Royal purple 5W-30, 9140 on oil, 0 makeup
my car / univ avg
alum 5 / 3
chrom 1 / 1
iron 11 / 19
cop 47 / 31
lead 2 / 9
tin 5 / 1
moly 162 / 68
nick 1 / 1
mangan 1 / 2
silvr 0 / 0
titan 0 / 0
potas 1 / 3
boron 14 / 51
silicn 10 / 12
sodium 36 / 23
calc 2192 / 2233
magnes 1182 / 127
phos 782 / 686
zinc 981 / 845
bari 0 / 0
/ should be
sus vis 210f / 59.2 / 54-61
cst vis 100c / 10 / 8.5-10.8
flashpt f / 420 / > 365
antifrz / 0 / 0
water / 0
insol / 0.4 / < 0.6
TBN / 6.1
Blackstone:
The second sample from your impala looks a little better than what we saw back in july and thats excellent considering this oil was run a lot longer than that was. The drop in copper was expected and that shows the last remnants of wear-in at brass/bronze parts washing out of the engine. It should read below average next time. All other wear looks great and the oil was still in good shape physically. The TBN was strong at 6.1, so lots of active additive was left. 12% left on the OLM seems a bit conservative. try going 11,000 miles next and check back.
Ran the oil to 9,140 miles, OLM was at 12% snd sump was over 1/2 qt low so instead of adding oil, I changed it. Last post was using Synpower and a 1 yr oci, and things improved during my longer hiway run. This car has a factory oil cooler which may add to the copper reading. Oil sample was from the Fram xtended guard oil filter which the oil tech punched a hole in. here is my Blackstone report:
GM 5.3L 327 v8 28,220 miles on unit
Royal purple 5W-30, 9140 on oil, 0 makeup
my car / univ avg
alum 5 / 3
chrom 1 / 1
iron 11 / 19
cop 47 / 31
lead 2 / 9
tin 5 / 1
moly 162 / 68
nick 1 / 1
mangan 1 / 2
silvr 0 / 0
titan 0 / 0
potas 1 / 3
boron 14 / 51
silicn 10 / 12
sodium 36 / 23
calc 2192 / 2233
magnes 1182 / 127
phos 782 / 686
zinc 981 / 845
bari 0 / 0
/ should be
sus vis 210f / 59.2 / 54-61
cst vis 100c / 10 / 8.5-10.8
flashpt f / 420 / > 365
antifrz / 0 / 0
water / 0
insol / 0.4 / < 0.6
TBN / 6.1
Blackstone:
The second sample from your impala looks a little better than what we saw back in july and thats excellent considering this oil was run a lot longer than that was. The drop in copper was expected and that shows the last remnants of wear-in at brass/bronze parts washing out of the engine. It should read below average next time. All other wear looks great and the oil was still in good shape physically. The TBN was strong at 6.1, so lots of active additive was left. 12% left on the OLM seems a bit conservative. try going 11,000 miles next and check back.
