? Do NOT stop driving your Roxor because you have not done the EGR delete. Do not panic! ?
EGR: Exhaust Gas Recirculation (your car has it, too)
Here is an explanation from
Machinerylubrication.com
They talk about high mileage, high hour diesel engines: Semis, generators, construction equipment, etc.
"...EGR essentially sends the emissions back to the combustion chamber creating a multi-pass opportunity for soot to ingress to the lubricant. An EGR valve regulates how much exhaust gas is recirculated. At idle, about 70% of the exhaust gas is recirculated, while only about 10-20% is recirculated at full load.
While EGR does effectively reduce NOx and soot emissions to the atmosphere, soot loads in the lubricant can be expected to increase dramatically, causing increased temperature and viscosity, dispersancy failure, fouling, deposits and wear..."
On a semi that runs +100K miles per year, soot in the engine matters. The more soot, the more often you need to change the oil. Each oil change on a semi can take 15 gallons of oil ($300 for just the oil). That adds up when cost per mile performance is measured in pennies. On a semi it also makes a difference (in a driver's income) if the engine lasts 800k miles or 1 million miles.
Fleets will do oil sampling to measure remaining oil quality at certain intervals to reduce number of oil changes: $50 oil sample vs hundreds for an oil change.
On a Roxor, one drives maybe 1000, 3000, 5000 miles per year? That is an oil change. If you drive 500 miles a year, that is an oilchange. You drive 300 miles in dense dust, that is an oilchange. Most of us change the oil because we come up on the once-per-year mark, not because we drive 1000s of miles.
My point is: less soot from EGR delete is not much of a faktor for a low mileage Roxor.
If I drive 1000 miles per year every year, I will be a 100 years old before I think my Roxor will need an engine rebuild. (Maybe, I will be a 110 years old if I have an EGR delete).
So, why did I select to have my ECU programmed so the EGR valve stays closed? It was free, did not cost me a second of my time, and does not hurt.
If you like to work on the Roxor (I do ?), remove every bit of EGR pipe.
If you like to drive the Roxor (I do ?), save yourself the time of an EGR delete and spend more time driving the machine.