To preface....I'm extremely easy on my car, change the oil every 4000mi with Amsoil. I bought it used in May 05 with 10,000 miles, it was an "Executive Demo" so somebody from Volvo was driving it as the company car since new. I've put 10k hwy miles on it since then. I had a feeling it was driven pretty hard because the front tires were well worn and the avg. mpg was 18 when I bought it and it's now 22.5.<p>Last week I asked my brother to accelerate from 1st through 2nd down my street because I wanted to hear what it sounds like from outside the car. Sounded cool. My car is totally stock but I just wanted to hear it. Anyways, it smoked a little bit which kind of concerned me. I know most vehicles will puff a little under hard acceleration but I just wanted to see if anybody else has noticed/witnessed this as well. I'd love to believe that the owner actually broke in the engine but I sort of doubt it. Nothing I can do about it now but I was thinking of getting the IPD ecu upgrade sometime but I don't want something to happen and me be stuck with a smoking R and no warranty to fix it. Worried for nothing?<p>Is there any way to test the engine? I know a compression test would be a pain but that is the only thing I can think of. <p>I'm sure this engine is much tougher than I'm giving it credit for, but I just read the thread on engine break-in and got all freaked out about that smoke. I also was driving behind an S70 T-5 yesterday that was smoking like an old Mercedes 300D.