Could have had a 2-stroke Neon? (10% better city MPG in factory tests)

[jamesqf]

Originally Posted by rmay635703

NoX and rings are the only 2 reasons automakers did not choose that tech, eliminate NOx worries and ring issues might be possible to overcome.

Not so, at least from my understanding of how 2-cycle engines work. First, on every stroke part of the incoming fuel/oil-air mixture is sucked right through the cylinder and out the exaust port. There's a major source of unburned hydrocarbons, and poor fuel efficiency.

[RobertISaar]

direct injection eliminates that though, since the injector can be commanded to only fire once the exhaust port has been covered.

[cRiPpLe_rOoStEr]

Originally Posted by rmay635703

My car is oil injected, it doesn't matter what oil I use and it does not smoke once warm, unless I lean into the thing at redline RPMs

Which car is that? BTW oil injection is often quoted to be more efficient in oil consumption because it runs a lower amount of oil at higher RPM than it would be with pre-mix, which also helps to decrease the smoke.

[rmay635703]

Originally Posted by cRiPpLe_rOoStEr

Which car is that? BTW oil injection is often quoted to be more efficient in oil consumption because it runs a lower amount of oil at higher RPM than it would be with pre-mix, which also helps to decrease the smoke.

Subaru 360 smokes during start then goes clean after it heats, If I rev it up @wot (possibly more than it should be as its a low RPM 2 cycle) it smokes a lot

So long as I am not near redline I do not note the car smoking excessively during my normal runs even at wot.

Cheers
Ryan