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Supposedly the increased calcium (detergent) content in diesel oil can increase the likeliness of pre-ignition in direct injection turbo gas engines. I have no idea how, but apparently when pre ignition occurs around the piston rings, there's enough force to break the piston.

Looks like there's some do's and don't to keep in mind. You could make your own easily enough, and it looks like one with a large paper filter will do the best job catching the oil vapor.

I'm guessing if the coating is intentional, it is to help it cool better. Dark surfaces radiate heat better.

More fuel + more air = more power which means I don't need as much throttle as in the summer, except to fight through the denser air. Just think about it for a while. I may be the stubborn one who will come around and agree a week later, but it could be you too.

More fuel isn't needed if you don't push the pedal down as far. Assuming a person keeps their summer and winter acceleration constant, wind resistance will be the dominant factor, especially when coasting down hill or to a stop. Anything that slows the vehicle, be it wind resistance or brakes is...

I have some I run at 32:1 because it leave the engine looking dry inside. I've run benol at 25:1 and the piston was so wet, no carbon could stick to it. I'd have to run a longer test to confirm. Got some smokeless synthetic equivalent of benol I still haven't tried: KL-198

Not a bunch, just enough to smell from lots of gas cans. I think you are wrong here. The worse MPG is by far due to driving through denser air. The aerodynamic factor weighs in much more than the increased power made from burning more fuel in denser air.

Would you agree that blends vary by region? I smell the difference around here. Gas cans stinking up the garage.

Makes me wonder what else you haven't noticed.

I was wondering. Something didn't look quite right. I assumed it was probably OEM since it came off a repair from way out in the country, and was sitting in a Stihl box. No KS or MAHLE on it.

That explains why costco gas smells weird. Not as bad as kroger gas, but it stinks in a different way.

Would injector cleaner in the fuel help any?

I saw that, and was wondering the same, but it looks a bit rough, and the ports show no signs of work.

It's official

Is this junk, or salvageable? I don't see any damage to the cylinder wall above the ports, so I'd consider it salvageable. I have no need for it, make offers

It would be great if in such cases the old oil was put back in to see if it fixes the slipping or whatever other problems occurred. Supposedly Lucas syrup (stop slip) additive can help some transmissions a lot. It's best just used to get you by as you save up for a fix.

This one's funny, same trans as the charger

Yes. And there's no dipstick or drain plug. It's grounds for them to receive an F minus on their environmental score for making people neglect their car so they buy a new one more often. Where are the Big Oil subsidies for pushing frequent ATF changes on people?