Breaking in a Yaris?

[ponieswhee]

Originally Posted by blacksan

I am a machinist by trade and have been involved in motor work for longer then I care to remember. Having said that I firmly believe in manufacture suggest break in. There is a reason for them telling you this folks! These motors need to bed in the components to some degree. Not all motors will be the same due to production tolerance in individual parts, but you can not go wrong by following procedure. On the other hand not following procedure is in fact POSSIBLY abusing the motor which MIGHT lead to premature failure and most certainly contribute to shortened service life of the engine. I have seen a lot of debris in oil samples of relatively new engines before. I would even suggest that you swap your filter and top off you oil at about 500 miles.

Like I said, I'm almost done with the break in period, so it won't kill me take it easy for a week. The roads around here are tight and curvy enough to the point where it seems like the stock 185/60 tires are more of a performance bottleneck than not being able to wind the motor all the way out. I'll take your suggestion and check the oil filter tomorrow. Would it be ok to switch to Mobil 1 when I do that, or is there some reason the first change has to be done at 3000 miles?