Norm
Vendor
Absolutely not intending to dispute burning a small amount, but it might be worth considering that computer managed engines can react radically differently to wrong fuel than do not-managed ones. Add diesel to a not-managed system and the higher temperatures required to burn the diesel will result in incomplete or slow burning which usually only results in some power loss. The diesel can provide some upper cylinder and valve stem lubrication as stated. There used to be products marketed as "top oil" back many decades ago which contained diesel or "diesel like" hydrocarbons. The effects of diesel or other slower burning fuels are similar in "not managed" injected and carbureted engines, IME.
Problem is when diesel is added to a "managed" engine, because the incomplete burning of the fuel results in higher hydrocarbons/lower O2 level which is detected by the O2 sensor. The O2 reports higher voltage which the ECU interprets as rich mixture so it reduces injected fuel amount (reduced pulse width). This lean mix burns hotter and slower, sometimes causing combustion chamber temperatures above critical levels.
I'm aware of several pick-up truck engines which were cooked/destroyed due to topping up with some diesel into a gas fueled engine. I recall reports of some others but would have to do some checking with acquaintances. I can ask around to refresh memory if someone is interested.
FWIW, I recommend not riding a "managed engine" to use up contaminated fuel unless one takes precautions such as, possibly, disconnecting the O2 sensor to prevent going into closed loop. I'd not do it at all. Pump out the fuel and burn it in your KLR, IMO. ;-)
Problem is when diesel is added to a "managed" engine, because the incomplete burning of the fuel results in higher hydrocarbons/lower O2 level which is detected by the O2 sensor. The O2 reports higher voltage which the ECU interprets as rich mixture so it reduces injected fuel amount (reduced pulse width). This lean mix burns hotter and slower, sometimes causing combustion chamber temperatures above critical levels.
I'm aware of several pick-up truck engines which were cooked/destroyed due to topping up with some diesel into a gas fueled engine. I recall reports of some others but would have to do some checking with acquaintances. I can ask around to refresh memory if someone is interested.
FWIW, I recommend not riding a "managed engine" to use up contaminated fuel unless one takes precautions such as, possibly, disconnecting the O2 sensor to prevent going into closed loop. I'd not do it at all. Pump out the fuel and burn it in your KLR, IMO. ;-)
A small amount would not hurt, just some good lubrication for the cylinder. But they don't like full diesel.