Third oil change on my car.
First UOA on this engine.
Second UOA on this engine.
As usual, they did not put together on the sheet the UOA results I asked for so you will have to go to the link above to see the previous one (they put my first one as lane 1).
Lane 2 is this UOA at the beginning after one day of commute to have a starting point to compare.
Commute did not changed: 110 kms (70 miles) per workday, 80% highway, 10% city and 10% traffic jam (at the end of the commute).
The oil was changed for warranty reason (12.000 kms or 6 months): 7336 miles and almost 6 months.
I continued the hypermiling technique to find that if you babie the car really well for the first 5 to 10 minutes it returns 0.5l/100km less in fuel economy. So now, my fuel tank returns about 7.3l/100km (32 mpg) and I was never above 8-8.5l/100km (27.7-28 mpg) during this winter.
The engine never saw rpms above 2,000 except the last leg before doing the oil change in the hope to move the chunk out if possible (few full throttle when engine was warmed up).
I find the results quite good for an engine with less than 18,500 miles with silicone at 10, iron at 11, and no copper.
The part I don't understand is the Nitration flagged (28-12=16).
Could someone explain to me this? It would be greatly appreciated.
Here is the UOA:
First UOA on this engine.
Second UOA on this engine.
As usual, they did not put together on the sheet the UOA results I asked for so you will have to go to the link above to see the previous one (they put my first one as lane 1).
Lane 2 is this UOA at the beginning after one day of commute to have a starting point to compare.
Commute did not changed: 110 kms (70 miles) per workday, 80% highway, 10% city and 10% traffic jam (at the end of the commute).
The oil was changed for warranty reason (12.000 kms or 6 months): 7336 miles and almost 6 months.
I continued the hypermiling technique to find that if you babie the car really well for the first 5 to 10 minutes it returns 0.5l/100km less in fuel economy. So now, my fuel tank returns about 7.3l/100km (32 mpg) and I was never above 8-8.5l/100km (27.7-28 mpg) during this winter.
The engine never saw rpms above 2,000 except the last leg before doing the oil change in the hope to move the chunk out if possible (few full throttle when engine was warmed up).
I find the results quite good for an engine with less than 18,500 miles with silicone at 10, iron at 11, and no copper.
The part I don't understand is the Nitration flagged (28-12=16).
Could someone explain to me this? It would be greatly appreciated.
Here is the UOA: