Why do so many Americans hate European trucks?

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But the burnt oil goes into the EGR loop and the DPF. What does the downtime cost?

 

If you ever installed piston rings on a piston, or pistons in cilinders, on a heavy duty engine you would know that this is complete BS.
The oil control rings have almost no tension.
The compression rings are the ones that have the tension on them.
And this is just a pre-load. With the engine running, it is the cilinder pressure that pushes the rings outside to provide the seal with the cilinder.

Cilinder pressure does not get behind the oil control rings, in most piston there are holes in the ring groove to drain the oil and prevent pressure build up.

 

Do you realy think that the engine will be 1% more efficient, just because of somewhat lower tension on the oil control rings?

 

Its +20 to +35C here in summer so I don't feel the need to run synthetic. Winters here hit -35C all the time so I switch to synthetic. I change oil every 8k km as per Ford's recommended service interval.

 

That's one of the reasons for low SAP synthetic oils, they are safe for the EGR loop and the DPF.

 

Intermediate ring also plays big part in oil control as well as liner roundness, crosshatch angles, and surface roughness to name a few.

 

You need to read up on a DPF. Do I need to provide you some links again?

 

That seems to be a typical US thing, frequent oil changes. Over here 20,000 km or 2 years is quite normal with synthetic long life oil.

 

Acea E6:

E6 Stable, stay-in-grade oil providing excellent control of piston cleanliness, wear, soot handling and lubricantstability. It is recommended for highly rated diesel engines meeting Euro I, Euro II, Euro III, Euro IV, Euro V and Euro VI emission requirements and running under very severe conditions, e.g. significantly extended oil drain intervals according to the manufacturer’s recommendations. It is suitable for EGR engines, with or without particulate filters, and for engines fitted with SCR NOx reduction systems. E6 quality is strongly recommended for engines fitted with particulate filters and is designed for use in combination with low sulphur diesel fuel. However, recommendations may differ between engine manufacturers so driver manuals and/or dealers shall be consulted if in doubt.

 

Try to read up a bit about the problems VAG engines had some 7 years ago, and why these problems occurred.