amsoil switch from pyb, 4 UOAs, 2004 awd astro

[pb]

all test from OAI lab.
Code:


OIL ATM 10W30 ATM 10W30 PYB 5W30 UNK ORGANIC

MILES(TIME IN USE) 12.1K 9K 8628 11K

O&F CHANGED Y FILTER Y Y

MILES 146K 143K 134K 125K

MAKEUP OIL 1 1 .5 0

SAMPLE TAKEN 17-AUG-10 7-JUL-10 25-MAR-10 24-NOV-09



IRON 12 10 22 15

CHROMIUM 0 0 0 0

NICKEL 0 0 0 0

ALUMINUM 2 2 8 3

COPPER 3 2 2 4

LEAD 4 2 3 4

TIN 0 0 0 1

CADMIUM 0 0 0 0

SILVER 0 0 0 0

VANADIUM 0 0 0 0

SILICON 16 12 16 16

SODIUM 8 7 53 285

POTASSIUM 0 2 0 2

TITANIUM 0 0 0 0

MOLYBDENUM 60 54 82 33

ANTIMONY 0 0 1 0

MANGANESE 0 0 0 0

LITHIUM 0 0 0 0

BORON 108 157 42 18

MAGNESIUM 18 11 30 11

CALCIUM 3273 3329 2133 1926

BARIUM 0 0 0 0

PHOSPHOROUS 719 695 849 693

ZINC 839 808 1033 806



WATER 0 0 0 0

cSt @ 212ºF 12.1 11 9.8 10.9

FUEL 0 0 1.2 0

TBN 5.95 6.16 2.32 2.67

OXIDATION 54 47 16 15

NITRATION 26 21 22 21

 

[CarbonSteel]

Good reduction of iron and aluminum versus the PYB. The TBN is still quite high--any particular reason for changing it?

 

[pb]

Originally Posted By: 2010_FX4
Good reduction of iron and aluminum versus the PYB. The TBN is still quite high--any particular reason for changing it?

no, just what i was doing almost 5 years ago. thought that was the best for it. and knew of the gamble to switch that late, so i documented it.

 

[simple_gifts]

Lots of UOA from pb. Did you buy a drum of ATM?

 

[JerryBob]

I think PYB has more moly in it these days. Impossible to say if today's PYB is any better.

 

[KCJeep]

Yes that is the SM version of PYB but it was still a top tier conventional at that time as well.

 

[pb]

Originally Posted By: simple_gifts
Lots of UOA from pb. Did you buy a drum of ATM?

that and a box of sample kits. going through my file- thought i might as well share.

 

[Clevy]

Originally Posted By: 2010_FX4
Good reduction of iron and aluminum versus the PYB. The TBN is still quite high--any particular reason for changing it?



Look at the miles. The PYB had 9000 miles on it. The Amsoil runs were less than half that according to the odo miles.
Yet miles in use states different numbers.

If we go by the miles I use then yes it's significant however if we follow the miles on odo values Amsoil fared much worse.
Maybe the op will clear up the confusion I'm experiencing with the inputs.

 

[CT8]

Originally Posted By: Clevy
Originally Posted By: 2010_FX4
Good reduction of iron and aluminum versus the PYB. The TBN is still quite high--any particular reason for changing it?



Look at the miles. The PYB had 9000 miles on it. The Amsoil runs were less than half that according to the odo miles.
Yet miles in use states different numbers.

If we go by the miles I use then yes it's significant however if we follow the miles on odo values Amsoil fared much worse.
Maybe the op will clear up the confusion I'm experiencing with the inputs.
Seems the filter was changes on the 9,000 Amsoil uoa but then at 12,000 the oil was changed? Seem like something I would do????? None were really bad for the miles

 

[pb]

Originally Posted By: CT8
Seems the filter was changes on the 9,000 Amsoil uoa but then at 12,000 the oil was changed? Seem like something I would do????? None were really bad for the miles

correct, I was worried about the synthetic cleaning the engine and loading up the filter.

 

[crazyoildude]

I trust pennzoil.