Quote:
Originally Posted by Lubehead
Not only is it nothing to be concerned about, in many ways it is actually a good thing, especially when a long drain interval is the goal. While excessive consumption is obviously bad and hard on the wallet, the addition of the quart helps to replenish and stabilize the additive package. Especially the TBN (Total Base Number) which helps in neutralizing acids. In addition the boost to dispersancy capability(ability to keep contaminants in suspension -particularly soot) is always helpful.
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But it is bad for the environment. I think that is why 2 stroke engines are disappearing - they can't meet emissions regulations, no matter how thin the mix is. I say if you want clean oil, you should shorten the service interval and recycle the oil, not burn it and keep replenishing with new.