I got this web link from an Ecoboost Facebook page. It certainly is a good read.
http://www.enginelabs.com/engine-tech/oil-composition-direct-injection-low-speed-knock/
It looks it to me that We should stay away from high detergent synthetic oil especially with high Sodium levels.
Dont idle long and then hammer it. Give it a few good revs first. Clear that sludge off.
Here is a quote from with in this Article to start this discussion off.
“What we saw was that with the factory ECU tuning there was definitely a noticeable difference in the knock levels of the engine when running high Sodium and Calcium levels in a mineral based oil as seen in the top graph on the yellow line. The bottom graph shows the same engine calibration, but with a synthetic blend using only Calcium and at moderate levels. We also found ways to mitigate the amount of knock present by modifying the calibration with regards to injection timing and fuel pressure settings. Changing spark advance or retard had little effect at controlling the knock. It is also apparent, at least from the current state of processing the data, that the reactionary phenomenon is aggravated at lower engine temperatures. This is due to the viscosity index of the oil making it thicker and therefore more difficult for the rings to remove all of it from the cylinder wall, so more oil is exposed to the direct impingement of fuel splashing off the top of the piston and contacting the oil directly,” says Ben Strader......... so full syn should be good ? vs ford half n half stuff? i personally use mobil 1 as amsoil isn't sold in stores around here (and being 3x as much doesn't help though if it were easier to get i'd probably spring for it)
http://www.enginelabs.com/engine-tech/oil-composition-direct-injection-low-speed-knock/
It looks it to me that We should stay away from high detergent synthetic oil especially with high Sodium levels.
Dont idle long and then hammer it. Give it a few good revs first. Clear that sludge off.
Here is a quote from with in this Article to start this discussion off.
“What we saw was that with the factory ECU tuning there was definitely a noticeable difference in the knock levels of the engine when running high Sodium and Calcium levels in a mineral based oil as seen in the top graph on the yellow line. The bottom graph shows the same engine calibration, but with a synthetic blend using only Calcium and at moderate levels. We also found ways to mitigate the amount of knock present by modifying the calibration with regards to injection timing and fuel pressure settings. Changing spark advance or retard had little effect at controlling the knock. It is also apparent, at least from the current state of processing the data, that the reactionary phenomenon is aggravated at lower engine temperatures. This is due to the viscosity index of the oil making it thicker and therefore more difficult for the rings to remove all of it from the cylinder wall, so more oil is exposed to the direct impingement of fuel splashing off the top of the piston and contacting the oil directly,” says Ben Strader......... so full syn should be good ? vs ford half n half stuff? i personally use mobil 1 as amsoil isn't sold in stores around here (and being 3x as much doesn't help though if it were easier to get i'd probably spring for it)