Originally Posted By: 94JeepCherokee
I got my Blackstone Labs results in! Let me post...
OIL INTERVAL: 3,000 miles
OIL USED: Mobil 1 5W-20 grade
COMMENTS: ROBERT: Copper and lead are highlighted on this report because they read about twice the universal average level. The universal averages show typical wear for this type of Jeep engine after about 4,200 miles on the oil. Your run was a little less than that, so copper and lead indicate some extra wear at bronze parts,such as bushings. It's not an astronomical amount here, but it'll be something to watch in the future. This oil is contamination free, with no fuel or water found. Plus, low insolubles and silicon mean that your oil and air filters are working great. Try 5,000 miles next.
ALUMINUM 4 4 3
CHROMIUM 1 1 1
IRON 24 24 27
COPPER 8 8 4
LEAD 6 6 3
TIN 2 2 1
MOLYBDENUM 72 72 69
NICKEL 1 1 1
MANGANESE 1 1 1
SILVER 0 0 0
TITANIUM 0 0 0
POTASSIUM 0 0 3
BORON 51 51 46
SILICON 8 8 11
SODIUM 21 21 37
CALCIUM 1110 1110 2094
MAGNESIUM 528 528 132
PHOSPHORUS 583 583 728
ZINC 698 698 872
BARIUM 0 0 0
PROPERTIES
SUS Viscosity @ 210°F 56.9 48-57
cSt Viscosity @ 100°C 9.32 6.7-9.7
Flashpoint in °F 380 >355
Fuel % Antifreeze % 0.0 0.0
Water % 0.0 0.0
Insolubles % 0.3
So, guys, what do you think? I'm pretty sure all of my bushings and bearings probably have needed replaced for a long time anyway, so I'm not concerned. This is the oil fill that I added a quart of the Lucas Engine Stop-Leak to, which is mostly just their heavy-duty oil stabilizer with some seal conditioner.
Use a 40 grade or heavy 30 like German castrol like everyone else here with a jeep uses. A 5w-20 is too thin for that low rev high torque engine. I'd bet a 40 grade cuts those wear metals in half.
I don't get it. You post in every single jeep thread. You as questions to guys like KCJeep,who is pretty experienced in this particular area yet you ignore all the posts that state point blank that thicker is better in this engine.
You crack me up. Ask questions,ignore answers,then when your data comes in it shows they actually knew what they were talking about.
A 10w-30 hdeo would be awesome,and cheap. If you want to spend some money go lad up on German castrol. Its just that simple,and it was said so many times that even I know what a jeep needs and I've never so much as sat in one.
Hilarious