1988 Cadillac brougham QSGB 5w-30 3,908 miles

[SS1970chrysler]

1988 cadillac brougham- 307 4bbl 115,508 miles- driven 92 miles near daily
oil used- QSGB 5w-30, ST 5w-30 was top-off oil
qts added- 4
miles on oil- 3,908
sample date- 03/09/2013
Current - Previous
Aluminum- 19 - 23
Chromium- 3 - 6
Iron- 76 - 140
Copper- 3 - 6
Lead- 12 - 28
Tin- 0 - 1
Molybdenum- 93 - 11
Nickel- 1 - 0
Manganese- 1 - 2
Silver- 0 - 0
Titanium- 3 - 30
Potassium- 2 - 4
Boron- 45 - 8
Silicon- 10 - 10
Sodium- 67 - 298
Calcium- 2681 - 2306
Magnesium- 16 - 19
Phosphorus- 885 - 854
Zinc- 1021 - 1081
Barium- 0 - 0

SUS Visc. @210 F- 59.5 - 66.2
CST visc. @100 C- 10.08 - 11.93
Flashpoint in F- 395 - 400
Fuel%- Antifreeze%- 0 - 0
Water%- 0 - 0
Insolubles%- 0.5 - 0.5

Thanks for the notes. Aluminum and lead are lower in this latest sample from your V-8 so
pistons and bearings show better wear. This sample was in use about the same amount of miles as the last
oil run, and wear generally dropped. Some metals are still higher than average, but the improvements we
see here are great to see. The oil itself was in good shape and the viscosity held strong in the 5W/30 range.
No fuel, coolant, or water contamination was found. Insolubles held steady at 0.5%. Try around 5,000 miles
next. Nice report as of 3/9/13.

 

[SS1970chrysler]

During this oil run, the leaking oil pan was fixed, a stop-leak additive was used, and PCV+breather were replaced/cleaned.

 

[REDDOG]

Looks like things might be trending down if the make up oil volume was the same.

Was the previous run oil Mobil Super by chance?

Thanks,

 

[Chris Meutsch]

Good to see my "first" engine still going strong. Keep it up.
I had the 1988 Caprice wagon with this Olds V-8 iron pig in it.

 

[caravanmike]

looks like things are trending down nicely! you are achieving your goal of cleaning the motor out IMO. mike

 

[addyguy]

Agreed - with insols at .5 at 4k, engine is still being cleaned out.

 

[Hokiefyd]

My first was an '84 Cutlass with the 307 4bbl. I have a soft spot for Oldsmobile small blocks.

 

[SS1970chrysler]

Originally Posted By: REDDOG
Looks like things might be trending down if the make up oil volume was the same.

Was the previous run oil Mobil Super by chance?

Thanks,

Make-up quarts were down by 33% this time as the leak was fixed during this run. MS5k was the previous oil used. I had some left over from use in the Granada. I'd use it again with no reservations since the leaks are down.

 

[crazyoildude]

i had this 307 in a 83 custom cruiser had slightly around 400,000 miles on it when it went to the bone yard still running good!

 

[SS1970chrysler]

Originally Posted By: crazyoildude
i had this 307 in a 83 custom cruiser had slightly around 400,000 miles on it when it went to the bone yard still running good!


In my case, the rest of the car will likely fail first. This engine seems perfect in its' operation. I'd bet on the transmission or rust taking it out before that.

 

[crazyoildude]

i still love those old caddys i have 2 79 sedan de ville 1 1970 coupe de ville an 89 like you also

 

[Gasbuggy]

Man, you're racking up the miles! What is the gas mileage like? My old 85 Caprice did surprisingly well on the highway.

 

[SS1970chrysler]

Averaging around 22-25 combined. Better than my Riviera.