Concerned about high Iron and Aluminum...
Bought this car a year ago and changed the oil and filter after purchase. This sample is from that first run of Castrol 0w/40, not sure what was in there previously. The car is not driven hard, my wife's daily driver, ten miles each way to work and back plus some weekend drives with the top down (it's the Cabriolet) but nothing hard. Why would there be high aluminum and iron?
The car doesn't have a lot of miles and doesn't look like it was abused, very clean inside and out. It has the N51 engine and the GM 6-speed auto. It does have the extra emissions stuff (SULEV) and was originally sold in California. Runs very smooth and didn't use any oil in the 5k mile run. The only thing I have been concerned about is it seems to make a bit more whirring noise than I'm used to. Sort of sounds like a torque converter low on fluid, that sort of noise. Which is why I did a trans fluid change but it wasn't low and the new trans fluid didn't make it any quieter. So I donno, maybe these engines are just a bit whiny!
Bought this car a year ago and changed the oil and filter after purchase. This sample is from that first run of Castrol 0w/40, not sure what was in there previously. The car is not driven hard, my wife's daily driver, ten miles each way to work and back plus some weekend drives with the top down (it's the Cabriolet) but nothing hard. Why would there be high aluminum and iron?
The car doesn't have a lot of miles and doesn't look like it was abused, very clean inside and out. It has the N51 engine and the GM 6-speed auto. It does have the extra emissions stuff (SULEV) and was originally sold in California. Runs very smooth and didn't use any oil in the 5k mile run. The only thing I have been concerned about is it seems to make a bit more whirring noise than I'm used to. Sort of sounds like a torque converter low on fluid, that sort of noise. Which is why I did a trans fluid change but it wasn't low and the new trans fluid didn't make it any quieter. So I donno, maybe these engines are just a bit whiny!
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