Rotella-T syn
is a dino based oil!! So is most of mobil -1, penzoil plat, catrol, quaker etc....
The only oil you could say is bad(slippery) which is true is a polyester like redline! Even then it'd be hard to say because they have unregulated amounts of zinc ph boron and moly!
Cut open a fram tough guard then a mobil 1.......
RTS 5w-40 M1 5w-40 M04 GC Ams 5w-40
Install Date 4/6/2006 3/20/05 11/18/04 8/7/04
Install Miles 83976 63598 54598 44720
Drain Date 12/11/2006 8/14/05 3/20/05 11/18/04
Drain Miles 90589 76096 63598 54598
Interval Miles 6613 12498 9000 9878
Oil Filter PL30001 M1-301 M1-301 SDF-15
Air Filter Purolator Wix/Purolator Wix Fram
Auto-RX 2oz. 2oz. 2oz. 3oz.
Al 3 3 2 3
Cr 1 1 1 1
Fe 28 23 35 20
Cu 4 4 3 4
Pb 1 3 3 3
Sn 0 1 0 1
Mo 6 4 5 5
Ni 1 1 1 0
Mn 1 1 1 1
Ag 0 0 0 0
Ti 0 0 0 0
K 2 0 2 3
B 12 17 4 8
Si 13 9 10 8
Na 50 7 9 6
Ca 4921 1984 2422 3285
Mg 31 340 110 51
P 1207 819 687 968
Zn 1500 988 840 1054
Ba 2 0 0 0
SUS 76.5 80.5 67.9 80.2
FP 365 420 380 405
Fuel TR <0.5% <0.5% <0.5%
Coolant ? 0.00% 0.00% 0.00%
H20 0.00% 0.00% 0.00% 0.00%
Insol 0.30% 0.30% 0.30% 0.30%
TBN 4.4 2.6 3.4 3.2
Clearly this 2001 XJ is running strong on slippery oils!!! (Even though coolant is leaking in!!! Look at Sodium and Potassium....0331 likely. The rotella stands up to it! this guy needs to adress is 01!!!)
Look at the add packs on the Rotella syn... I mean come on.... its packed up, cheap and awesome wear protection, even after 6k Mobil held fine too after 12k (delvac 1 SL CI-4) more expensive.!!
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=813699&fpart=1