Control intake valve, combustion chamber deposits

[jorton]

Is there a type of oil that helps control deposits? Does Mobil Clean with sodium detergent additive help keep good ring seal? Does a synthetic brand that markets oil with "Deposit Control" really help control deposits?

Since fuel dilution is a common issue in many models and produces deposits, and deposits rob fuel economy, I would like to try to control it with the right motor oil.

 

[dargo]

would not like Fp+ or 131 help.

 

[BarkerMan]

I'm sure that those oil's add something that advertise such performance but who knows what and if it's effective. I'd try the maintenance dose of Auto-Rx. Then you can be sure something is in there because you did it. I know at one bottling operation they put three different labels on the bottles in the same run for a small marketing operation that sells to fleets. If the packaging does not get your attention you will never try the product.

 

[psudaytona]

Oil wont help with combustion chamber deposits. If your oil is getting in there in such a quantity that it would wash the chamber...your engine has more serious issues.

Best option is just run a good quality motor oil(synthetic would last a bit longer) and keep the change intervals reasonable. These engines arent known to be sludge monsters(mine has 110K and its still VERY shiney from what I see in the filler cap).

As for the combustion chamber and valves, a top tier gasoline will help maintain cleanliness. Running a good fuel system cleaner every few thousand will help as well.
Redline SI-1, Gumout Regane, and Techron concentrate are all great over the counter products for this task.

Fuel Power Plus or Fuel Power 60 and Amsoil PI are great products as well but have to be ordered.

 

[FowVay]

A excellent chemical technology to clean intake valves and remove carbon from combustion chambers is polyether amine (PEA).

Look for fuel additives that contain this product in amounts of 30%-40% and you'll see noticeable improvements in vehicle performance.

Gumout Regane, CRC industries "guaranteed to pass emissions formula", Chevron Techron, are just a few OTC products to contain PEA.

 

[wiswind]

Don't forget to give the PCV system a looking at as this can be a way that excessive oil can be drawn into the cylinders....and leave you with combustion chamber deposits.......check to see if there are any TSB's that address any issues like this for your vehicle (Technical Service Bulletins will give you more information than recalls.....as they give you fixes for problems....that don't warrant a recall).

One example that comes to mine is that 1999 and 2000 3.8L FORD Windstars have a improved front valve cover available that has an improved baffle by the PCV valve.....to address the excess oil being drawn into the cylinders....resulting in combustion chamber deposits......causing "pinging".

Auto RX claims to clean around the rings resulting in a better seal/seating.....follow the application instructions on the ARX website.
Lots of discussion on ARX in the Oil Additives forum on this website.
I use ARX....and they are a site sponsor.....easy to buy through their website.

As mentioned, fuel additives, discussed in the Fuel Additives forum on this website, also can help.
I use Scheaffers "Soy Ultra" fuel additive, that I bought through Salesrep from this website.

Some oils claim to have a lower evaporation rate....which can reduce the vapor drawn in through the PCV line.....although there are other factors at play there as well.
All that said.....A healthy PCV draw out of the combustion chamber is IMPORTANT as there are "badies" that you need to get out of there.......so I don't advocate doing anything to reduce that.....

 

[RI_RS4]

Originally Posted By: jorton
Is there a type of oil that helps control deposits? Does Mobil Clean with sodium detergent additive help keep good ring seal? Does a synthetic brand that markets oil with "Deposit Control" really help control deposits?

Since fuel dilution is a common issue in many models and produces deposits, and deposits rob fuel economy, I would like to try to control it with the right motor oil.


Valve deposits can come from the fuel or from the oil. Oils that resist thermal breakdown will cause fewer deposits than oils do not resist thermal breakdown well, thus, PAO and Ester based oils tend to run cleaner. But, because very little oil every passes over the valves, it is doubtful that oil can "clean" deposits from the valves, especially those created by the fuel. You can, however, use a good oil and fuel additives to work in synergy and clean the engine from top to bottom. Renewable Lubes Bio-synthetic oils, and BioPlus fuel additive, with their Bio-esters tend to work together to reduce deposit formation, while cleaning.