By on December 27, 2016

focus_occs1_01

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?

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