Question about CRC intake valve cleaner

[Xmetal]

I agree with the do not use mention. The best way to assure minimum buildup is by using top tier fuels and keep the engine from lugging..Top tier fuels have up to 19 times the carbon reducing additives than cheap low tier fuels..Top tier may be a bit more $$, but how much is an engine teardown for impacted valves?Conoco, Exxon, Shell, Mobil, Marathon, Cosco..are good top tier fuels..There are others in certain regions..I use 93 octane Shell, Exxon or Marathon @ $5.04/gallon as of yesterday.

Top Tier may not be enough to keep these direct injection engine clean. There is now a new Top Tier Plus list.

https://www.toptiergas.com/top-tier-plus/

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[cryptolime]

No, it doesn't really help anything. Port injection doesn't have carbon problems anyway. But I like to rev it out.

I have heard that vacuum pulls can help with intake valve deposits. Like revving it up to redline on a downhill and letting it coast down in gear.

 

[blitz423]

Doesn't Air/Oil Seperator or catch can mitigate carbon deposit on valves?

 

[Cueyo]

Doesn't Air/Oil Seperator or catch can mitigate carbon deposit on valves?

It helps with blow-by, so technically yes, but there's no replacement for a walnut blasting.

Also as a sidenote, has anyone on this platform or the fk8 or the one before that has any issues with carbon buildup? I wonder what miles people with older type Rs are cleaning the intakes

 

[cryptolime]

Doesn't Air/Oil Seperator or catch can mitigate carbon deposit on valves?

supposedly the OEM PCV system is extremely good

It helps with blow-by, so technically yes, but there's no replacement for a walnut blasting.

Also as a sidenote, has anyone on this platform or the fk8 or the one before that has any issues with carbon buildup? I wonder what miles people with older type Rs are cleaning the intakes

i've actually never heard of anyone walnut blasting their intake valves on Honda forums

 

[zymmer4]

Top Tier may not be enough to keep these direct injection engine clean. There is now a new Top Tier Plus list.

https://www.toptiergas.com/top-tier-plus/

I have never seen a "top tier" label on a gas pump..but I have just been driving in the USA. The point that I was attempting to make was that we have options..We can buy discount,but gov. allowed minimum additives, or we can choose brands that have up to 19 times more protective additives than gov. minimum brands. I choose the top tier brands in my region.

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