Long time listener...first time caller here. A brief intro..have a few old school 60's..do own maintenance. Well versed..first time owning a BM trouble U.
Here are the facts. Bought a CPO 2013 335 with 19.7k on the odometer. Carfax (ha) showed no maintenance (oil change) up till lease turn in other than a tire replacement. Car was inspected and serviced.2 weeks after purchase..pulled the e brake..cable snapped and locked the left rear wheel for about 100 yards or so..then freed up. Well..made an appt. to have the cable replaced (could hear rattling on plastic shield. Before I could get in for warranty, mpg decreased from 23 to 19, and the pins holding the e brake pads sheared off due to heat and caused the backing plate and E brake to drag..causing the decrease in mpg. Well..BMW warrantied and changed the oil and filter again at 21,560 with 0w 30. I changed oil at 28,650 miles (80% highway) with BMW 5W30. Changed oil at 35490 after putting in 16 ounces Seafoam and 90 miles later. After an hour drive, drained immediately and found multitudes of mainly aluminum flecks in the oil and probably 100 to 125 fine aluminum flecks filter pleats. I changed oil with 5w40 Liquid Moly and after a hundred miles...I drained a quart and found more fine aluminum and some copper flecks in oil (clean pan). MPG had again gone down from 23.1-23.6 to 19.9 to 20.4. Granted the change in fuels from summer to winter accounted for and did 8 to 10 separate resets on computer calculating mpg on a mean avg.
Other than the 4 mpg difference in mileage...no noises..no SES lights..nothing unusual. I typically warmed engine when below 10 deg. for 5 to 10 minutes. When I did a hard break in on my LS3, I expected to see what I saw. However, 36k and 5 oil changes later? Btw..I'm a fast driver on freeway... and I don't rag on this car. Aluminum itself not necessarily harmful suspended..but had my curiosity piqued.
Sent off for Blackstone for the definitive opinion...but for the interm, any thoughts..insights?
Here are the facts. Bought a CPO 2013 335 with 19.7k on the odometer. Carfax (ha) showed no maintenance (oil change) up till lease turn in other than a tire replacement. Car was inspected and serviced.2 weeks after purchase..pulled the e brake..cable snapped and locked the left rear wheel for about 100 yards or so..then freed up. Well..made an appt. to have the cable replaced (could hear rattling on plastic shield. Before I could get in for warranty, mpg decreased from 23 to 19, and the pins holding the e brake pads sheared off due to heat and caused the backing plate and E brake to drag..causing the decrease in mpg. Well..BMW warrantied and changed the oil and filter again at 21,560 with 0w 30. I changed oil at 28,650 miles (80% highway) with BMW 5W30. Changed oil at 35490 after putting in 16 ounces Seafoam and 90 miles later. After an hour drive, drained immediately and found multitudes of mainly aluminum flecks in the oil and probably 100 to 125 fine aluminum flecks filter pleats. I changed oil with 5w40 Liquid Moly and after a hundred miles...I drained a quart and found more fine aluminum and some copper flecks in oil (clean pan). MPG had again gone down from 23.1-23.6 to 19.9 to 20.4. Granted the change in fuels from summer to winter accounted for and did 8 to 10 separate resets on computer calculating mpg on a mean avg.
Other than the 4 mpg difference in mileage...no noises..no SES lights..nothing unusual. I typically warmed engine when below 10 deg. for 5 to 10 minutes. When I did a hard break in on my LS3, I expected to see what I saw. However, 36k and 5 oil changes later? Btw..I'm a fast driver on freeway... and I don't rag on this car. Aluminum itself not necessarily harmful suspended..but had my curiosity piqued.
Sent off for Blackstone for the definitive opinion...but for the interm, any thoughts..insights?