Does fuel lubricate upper cylinder/piston rings?

[BMWTurboDzl]

Originally Posted by CR94
If lubrication by gasoline (or additives in it) plays a significant role in minimizing upper-cylinder wear, how can engines fueled by natural gas last as long as they do?


Quite there son !! Don't ruin their day.

In all seriousness I fail to see how atomized fuel injected milliseconds prior to ignition can "wash" anything. On top of that today's engines even after tens of thousands of miles still reveal honing marks in the cylinder wall.

 

[Garak]

Originally Posted by spasm3
HMM which FM's ? That would be cool to add to fuel. Any relation to TCW-3 adds?

I have no idea what ones they use, but they are present in at least some gasolines.

 

[PeterPolyol]

Originally Posted by BMWTurboDzl

In all seriousness I fail to see how atomized fuel injected milliseconds prior to ignition can "wash" anything.

Forget milliseconds, who can even imagine a crankcase filling up with gasoline from the fuel injectors?! It's inconceivable

 

[Silverado12]

It's always been my understanding that the metal in the engine actually absorbs and holds oil on the surface, therefore not much wear.

 

[Brigadier]

Not as much as it used to due to ethanol.

 

[wag123]

Originally Posted by Brigadier
Not as much as it used to due to ethanol.

Yep, ethanol will wash the oil right off.
That is one of the reasons why I add TC-W3 2-cycle engine oil to my fuel (1oz to 5gal of gas). It helps to counteract the solvent effect of the alcohol as well as lubricating the upper cylinder, fuel pump, and fuel injectors.

 

[kschachn]

Originally Posted by wag123
Yep, ethanol will wash the oil right off.
That is one of the reasons why I add TC-W3 2-cycle engine oil to my fuel (1oz to 5gal of gas). It helps to counteract the solvent effect of the alcohol as well as lubricating the upper cylinder, fuel pump, and fuel injectors.

I wasn't aware that there were areas of the "upper cylinder" that need lubricating that aren't getting it properly from the oil, nor did I know that the fuel pump was inadequately lubricated by the fuel, nor did I know that fuel injectors needed lubrication. Are you sure all three of those aren't imaginary?

How have I made it all these miles in my vehicles using E10 exclusively and no "UCL"?

 

[BMWTurboDzl]

Originally Posted by PeterPolyol
Originally Posted by BMWTurboDzl

In all seriousness I fail to see how atomized fuel injected milliseconds prior to ignition can "wash" anything.

Forget milliseconds, who can even imagine a crankcase filling up with gasoline from the fuel injectors?! It's inconceivable

Touche,

Interestingly enough we still have exhibit A: Shell V-Power Nitro with its FMT (Friction Modification Technology) which allegedly "survives combustion" and deposits itself onto the cylinder walls.

https://www.moneysupermarket.com/ca...ovin-v-power-nitro-under-the-microscope/

Or maybe it doesn't (http://www.asrcreviews.org/narb-rec...or-shell-v-power-nitro-premium-gasoline/)

 

[Silver]

My question seems a bit irrelevant now, as I consider that there is probably a very thin layer of oil on the cylinder walls, even above the piston. Unless I guess you're running really rich.