Made the change to Mobil 1 TDT about 20k (4 changes) ago. When using GC 0w/30 bearing wear was a bit higher than I'd like - not critical, but not great either. The 2.3L SAAB really does need a 40wt oil. With the SAAB being a sludge prone engine and very hard on oil, the M1 TDT seemed to be a good choice and my latest UOA supports this nicely! This is a great oil for my engine.
Blackstone Comments:
Your engine has gained roughly 20,000 miles since we last saw a sample from it but wear looks better than ever! All wear now reads well below universal average levels and judging from what we found here your engine is free of any obvious problems. We don't know what you've done to get wear so low, but keep it up. We had been finding lead and copper, from the bearings, above average but now both read well below average. The TBN read 4.2 so you still had plenty of active additive remaining. We consider 1.0 too low for extended use. Nice engine!
Code:
Oil Mobil 1 TDT - Castrol (GC) - Castrol (GC)
Weight 5W/40 - 0W/30 - 0W/30
Makup qts 0.5 - 0.5 - 0.0
Miles on oil 5,666 - 4,845 - 4,998 - [5,100]
Miles on engine 79,299 - 58,937 - 54,092 - [n/a]
Sample Date 05/24/08 - 03/03/07 - 12/01/06
Aluminum 2 - 3 - 3 - [3]
Chromium 1 - 1 - 1 - [1]
Iron 11 - 55 - 40 - [22]
Copper 2 - 6 - 10 - [5]
Lead 1 - 10 - 4 - [6]
Tin 0 - 0 - 0 - [1]
Molybdenm 11 - 3 - 6 - [52]
Nickel 0 - 1 - 1 - [1]
Manganese 0 - 1 - 1 - [1]
Silver 0 - 0 - 0 - [0]
Titanium 0 - 0 - 0 - [0]
Potassium 1 - 0 - 2 - [1]
Boron 30 - 0 - 6 - [39]
Silicon 7 - 5 - 11 - [8]
Sodium 8 - 15 - 18 - [20]
Calcium 2,453 - 1,588 - 1,778 - [2,130]
Magnesium 446 - 425 - 468 - [259]
Phosphorus 980 - 796 - 887 - [839]
Zinc 1,304 - 932 - 1084 - [992]
Barium 0 - 0 - 0 - [5]
Note: Universal Averages in [brackets]
Sus Visco (210F) 70.6 - 64.7 - 63.4 - s/b 58-65
cSt Visco (100C) 13.10 - 11.52 - 11.16 - s/b 11.6 - 15.3
Flashpoint (F) 405 - 355 - 375 - s/b >385
Fuel % b
Antifreeze % 0.0 - 0.0 - 0.0 - s/b 0.0
Water % 0.0 - 0.0 - 0.0 - s/b
Insolubles 0.3 - 0.3 - 0.3 - s/b
TBN 4.2 - 3.8 - 3.6 - S/b >1.0
Blackstone Comments:
Your engine has gained roughly 20,000 miles since we last saw a sample from it but wear looks better than ever! All wear now reads well below universal average levels and judging from what we found here your engine is free of any obvious problems. We don't know what you've done to get wear so low, but keep it up. We had been finding lead and copper, from the bearings, above average but now both read well below average. The TBN read 4.2 so you still had plenty of active additive remaining. We consider 1.0 too low for extended use. Nice engine!
Code:
Oil Mobil 1 TDT - Castrol (GC) - Castrol (GC)
Weight 5W/40 - 0W/30 - 0W/30
Makup qts 0.5 - 0.5 - 0.0
Miles on oil 5,666 - 4,845 - 4,998 - [5,100]
Miles on engine 79,299 - 58,937 - 54,092 - [n/a]
Sample Date 05/24/08 - 03/03/07 - 12/01/06
Aluminum 2 - 3 - 3 - [3]
Chromium 1 - 1 - 1 - [1]
Iron 11 - 55 - 40 - [22]
Copper 2 - 6 - 10 - [5]
Lead 1 - 10 - 4 - [6]
Tin 0 - 0 - 0 - [1]
Molybdenm 11 - 3 - 6 - [52]
Nickel 0 - 1 - 1 - [1]
Manganese 0 - 1 - 1 - [1]
Silver 0 - 0 - 0 - [0]
Titanium 0 - 0 - 0 - [0]
Potassium 1 - 0 - 2 - [1]
Boron 30 - 0 - 6 - [39]
Silicon 7 - 5 - 11 - [8]
Sodium 8 - 15 - 18 - [20]
Calcium 2,453 - 1,588 - 1,778 - [2,130]
Magnesium 446 - 425 - 468 - [259]
Phosphorus 980 - 796 - 887 - [839]
Zinc 1,304 - 932 - 1084 - [992]
Barium 0 - 0 - 0 - [5]
Note: Universal Averages in [brackets]
Sus Visco (210F) 70.6 - 64.7 - 63.4 - s/b 58-65
cSt Visco (100C) 13.10 - 11.52 - 11.16 - s/b 11.6 - 15.3
Flashpoint (F) 405 - 355 - 375 - s/b >385
Fuel % b
Antifreeze % 0.0 - 0.0 - 0.0 - s/b 0.0
Water % 0.0 - 0.0 - 0.0 - s/b
Insolubles 0.3 - 0.3 - 0.3 - s/b
TBN 4.2 - 3.8 - 3.6 - S/b >1.0
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