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macbwt

Carbon build up City driving vs Interstate which has more carbon?

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I used my endoscopic camera to view the piston tops and intake valves of two 2011 Ford Edge limiteds with the 3.5 duratec. One is a grocery getter and the other is a work vehicle that drives primarily on the interstate. View the videos and see the difference.

 

 

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This is the interstate work vehicle

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This is the grocery getter. Keep in mind both engines have nearly the same miles at the time of the video (90,000 miles)

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Mac, do you think the use of Techron Concentrate Plus Fuel System Cleaner would clean up the cylinders (or valves)?

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Chris Fix has an interesting video series on such products (youtube). Anyway, the thing to remember is, if the problem is mild-moderate, over time, these products can be somewhat effective. But if the problem is moderate-severe, then you really shouldn't be trying to clean anything while the engine is turned on/vehicle is in motion. If chunks break off, that can have major downstream consequences for the exhaust system, and much worse in turbocharged engines. At that point, it would be best to take the lower intake manifold off and clean the valves cylinder by cylinder. Cleaning the piston tops is a different challenge, they can be cleaned in non-DI engines through the spark plug hole, with patience and persistence.

 

So Techron CP type products should be considered more "preventive" than "curative". And it does not hurt to change the oil shortly after you have run through that tank. Yes the byproducts in the oil may be minimal, but why risk it. So time the cleaning accordingly.

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Ultimately good ole straight highway driving is the best for your engine. Keeps it nice and clean.

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