DPF regeneration can make the engine feel different. I know a regeneration is taking place when I see engine coolant temperature get up to about 92 or 93C during normal driving with a higher than expected fuel delivery rate and the throttle valve moving from the 94% position. I first notice it, however, because of a feeling and different engine noise.

They take place a lot more often than I expected. I drive about 80 miles round trip every day. I think there's differing levels of regeneration also.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim