#PositiveCrankcaseVentilation

Mark writes:

Sajeev,

I’ve had my 2015 Focus ST for 15 months and 14,000 trouble-free miles so far, and I’m really enjoying the car. The car is still 100 percent stock, but I’ll likely contact Torrie for a tune before long.

As much as I like the car, I’m really alarmed to read about the intake valve “gunk” issues with Ecoboost and other direct-injection engines. It seems as if DI engines have a real problem that the manufacturers really aren’t willing to acknowledge or address (if it even can be addressed).

What’s your opinion on oil separators and/or catch cans? Are they a good preventive measure, or should I just resign myself to funding a cleaning via walnut shells or other similar clean-up tactics when gas mileage starts to dip, power drops, or misfires develop?

TTAC commenter Sjalabais writes:

Hi Sajeev,

I wrote to you once before about choosing a sensible family beater. In the end, I bought a 2002 Honda Stream, which I have since driven 30,000+ km. It’s a very rare car in Norway; only 147 on the road as of this year.

The Honda has been fairly reliable (lots of brake issues), practical enough (try to beat a ’70s Volvo!) and fairly robust. What I like is that it can take a beating when we go to the mountains.

Over the course of the last year, an odd issue has become an annoyance: Sometimes, the car will start, but not hold revs.