Here's Blackstone's report on my wife's Jeep Liberty after 1 year in the car w/ 9,228 miles on the oil. Filter was changed @ 6 months & topped off with 1 pint of fresh ASL. It used no oil during the past year. I used Lube Control when it was changed, and randomly throughout the past year. The car has 27,000 miles total. I've posted one other time w/ a report on this car last December.
Steve, We don't know the exact nature of Lube Control, but it may be the cause fo the lower flash point, which is reported in this sample as 0.8% gas contamination. Some additives have slovents in them that cause a low flash point. The oil's viscosity was actually high, reading up in the mid-15w40 range. Wear reading normally, about average for this type engine -- see universal averages -- after bloweing the doors off the oil use interval. This oil ws run 9,228 miles, vs 4,020 miles for other averaged ils sample from this type. TBN was 1.5, getting low.
I am a bit disappointed in this sample, but am open to comments. The car sees nearly 10,000 miles per year, but can go weeks w/ all short trips. Maybe this car should not be a candidate for extended intervals? At this change, I used Amsoil 0w30. Tempted to test again in the spring, and go to twice a year changes.
Comments?
[ October 11, 2005, 06:56 PM: Message edited by: 59 Vetteman ]
Blackstone comments:code:
2002 Jeep Universal Avg.
Aluminum 5 4
Chromium 3 1
Iron 37 20
Copper 9 6
Lead 3 1
Tin 0 0
Moly 8 46
Nickel 2 1
Manganese 1 2
Silver 0 0
Titanium 0 0
Potassium 0 2
Boron 22 69
Silicon 8 7
Sodium 8 8
Calcium 1673 2400
Magnesium 588 77
Phosphorus 739 735
Zinc 955 887
Barium 0 1
Sub Vis @ 210
s/b 56-68 actual: 73.9
Flashpoint
s/b >365 actual: 350
Fuel
s/b
Antifreeze negative
Water negative
Insolubles
s/b
Amsoil filter used both times
Steve, We don't know the exact nature of Lube Control, but it may be the cause fo the lower flash point, which is reported in this sample as 0.8% gas contamination. Some additives have slovents in them that cause a low flash point. The oil's viscosity was actually high, reading up in the mid-15w40 range. Wear reading normally, about average for this type engine -- see universal averages -- after bloweing the doors off the oil use interval. This oil ws run 9,228 miles, vs 4,020 miles for other averaged ils sample from this type. TBN was 1.5, getting low.
I am a bit disappointed in this sample, but am open to comments. The car sees nearly 10,000 miles per year, but can go weeks w/ all short trips. Maybe this car should not be a candidate for extended intervals? At this change, I used Amsoil 0w30. Tempted to test again in the spring, and go to twice a year changes.
Comments?
[ October 11, 2005, 06:56 PM: Message edited by: 59 Vetteman ]