I did some research on this recently and found some information on how Honda balances variables with the earth dreams engine to try and prevent this (and other issues balancing gas, spray pattern, oil, mpg, LSPI and efficiency).Several videos on youtube exist regarding a product (CRC intake valve and turbo cleaner) that some are using to mitigate possible valve corrosion and costly cleaning down the road due to the direct injection system. I’m wondering what people’s thoughts are regarding this as a preventative maintenance and if anyone actually does this.
Read this: https://hondakarma.com/data/attachm...da_2.4_L_Direct-Injection_Gasoline_Engine.pdf
Plus watch this: https://www.youtube.com/watch?v=vNBGrvpO05g
Short version: Honda uses beveled valves to allow gas to get up around the seal occasionally and clean it. This means that gas treatments should also help.
Plus there's not massive amounts of earth dreams owners complaining about ruined engines due to carbon buildup.
To answer your question directly, my approach is cautious... The 1.5 is a newish version of the earth dreams and they obviously have had some struggles in the combustion chamber in some cars. That said, I also trust the Honda engineers (I read the whole thing, fascinating stuff) and that their approach may work. My personal decision is to help the beveled valves get clean by using a bottle of bg 44k every other oil change:
BG 44K Fuel System Cleaner Funnel- 2 Cans https://www.amazon.com/dp/B01CDMU01Q/ref=cm_sw_r_cp_apa_i_IjnxCbX1MRJDH
Let us know what you end up doing!
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