Kerosene as a engine flush?

I don't like to flush engines. What makes you think yours needs to be? I see a lot of people who find the increased sludge on the PCV head of the J series and think their engine has a problem and needs to be flushed. This isn't the case.

Flushing is a very high risk, minimal gain investment compared to just using a high mileage synthetic oil and changing it regularly.

I'd imagine most of the big name brand engine flushes probably work. But you have to be careful using others, or you could end up with an engine like this:

plplplpl said:

So they should replace the PCV valve. Kind of a maintenance item.

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If it's really bad, yes. But just because the PCV head is a bti darker doesn't mean it's an issue.

plplplpl said:

Finally get to see what that ugly VCM system looks like naked.

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At least the VCM-1 system. VCM-2 has a video of its own: