Well it looks like the engine in my 1995 Buick Roadmaster Sedan Limited at 174K isn't doing good. You can see by the report I hadn't done a UOA in over 2 yrs. Over the past two years the car has spent a lot of time in and out of storage. Heck I didn't start driving it this year till July. Last year it was August, as it spent a couple months in the body shop for some work. Whether or not I racked any miles on the oil during those periods I usually always changed it out.
I figured I was going to do a UOA to see how the GC was holding up in the car. The previous 3 reports were from M1 0w40, and really wasn't impressed with it. SO when I changed my Oil pan gasket (last UOA) and pan (powdercoated too), I went to German Castrol. Have been running a Auto-rx Maintenance dose also. Most of all my driving is 45mph and above. I drive 30 minutes to work everyday (one way). and it's most all highway, but does require me to make a potential 7 stops.
I don't have a clue where the increased silicon came from, but I'm sure it was a leading cause in the increased wear numbers. The only thing I can think of is the powdercoated intake I installed prior to this OCI. Intake was media blasted and powdercoated (friend does coatings/finishes for living). I sprayed the intake out good with the air hose before I installed it, but perhaps I didn't get all of the blasting media out. The intake tract is in good shape and isn't leaking. Neither are the intake gaskets. Air filter is the same S&B that's been on since the last UOA and has a prefilter on it. It's in good shape, and I haven't driven in any dusty environments.
Had I sent this sample out earlier I wouldn't have taken a 1000 mile trip with the car. I have almost 2,000 miles on this OCI now. I plan on draining it this weekend and sending the sample in. Engine doesnt' sound any different, still makes great power, and even the worthless autometer oil pressure gauge reports good oil presure for the mileage.
I'm hoping the next sample shows different, otherwise might be rebuild time in the spring. BTW I've only ever used race gas once in the car and that was over 1.5yrs ago, and it was only ever 5 gallons. Blackstone must assume since I raced it I used leaded race gas. I can't complain, I've abused the car for 50K. 130+mph WOT blasts, 13.5 sec 1/4 Mile runs, and constant street abuse..
I figured I was going to do a UOA to see how the GC was holding up in the car. The previous 3 reports were from M1 0w40, and really wasn't impressed with it. SO when I changed my Oil pan gasket (last UOA) and pan (powdercoated too), I went to German Castrol. Have been running a Auto-rx Maintenance dose also. Most of all my driving is 45mph and above. I drive 30 minutes to work everyday (one way). and it's most all highway, but does require me to make a potential 7 stops.
I don't have a clue where the increased silicon came from, but I'm sure it was a leading cause in the increased wear numbers. The only thing I can think of is the powdercoated intake I installed prior to this OCI. Intake was media blasted and powdercoated (friend does coatings/finishes for living). I sprayed the intake out good with the air hose before I installed it, but perhaps I didn't get all of the blasting media out. The intake tract is in good shape and isn't leaking. Neither are the intake gaskets. Air filter is the same S&B that's been on since the last UOA and has a prefilter on it. It's in good shape, and I haven't driven in any dusty environments.
Had I sent this sample out earlier I wouldn't have taken a 1000 mile trip with the car. I have almost 2,000 miles on this OCI now. I plan on draining it this weekend and sending the sample in. Engine doesnt' sound any different, still makes great power, and even the worthless autometer oil pressure gauge reports good oil presure for the mileage.
I'm hoping the next sample shows different, otherwise might be rebuild time in the spring. BTW I've only ever used race gas once in the car and that was over 1.5yrs ago, and it was only ever 5 gallons. Blackstone must assume since I raced it I used leaded race gas. I can't complain, I've abused the car for 50K. 130+mph WOT blasts, 13.5 sec 1/4 Mile runs, and constant street abuse..
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