Thread: ('11-'14) FB20 Oil Analysis Thread
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Old 06-19-2012, 10:55 PM   #2
auskip07
Scooby Specialist
 
Member#: 315643
Join Date: Apr 2012
Chapter/Region: South East
Location: Atlanta Ga
Vehicle:
2012 Impreza Sedan
DGM 5mt

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Thankyou Commander Keen, I guess waiting till 7500 isnt a good idea

Im currently running Break in additive at around 3500

Interesting the Zinc levels are a little lower than average and Moly is way high


This is a Zinc additive website stating a few facts about engine breakin with modern oils.

#5 Redline oil and others are suggesting a 3,000-mile break-in for new engines! Proper seating of rings, with today’s lubricants is taking that long to properly seal. Shifting to synthetics before that time will just burn a lot of oil and not run as well as hoped.

For you science buffs: ZDDP is a single polar molecule that is attracted to Iron based metals. The one polar end tends to “Stand” the molecule up on the metal surface that it is bonded to by heat and friction. This forms a sacrificial layer to protect the base metal of the cam and tappet from contacting each other. Only at very high pressures on a flat tappet cam is this necessary because the oil is squeezed/wiped from the surface. This high pressure is also present on the gudgeon pin (wrist pin) in diesel engines, therefore the need for ZDDP in diesel engines.
Second part of the equation is Molybdenum disulfide (Moly). The moly bonds to the zinc adding an additional, very slippery, sacrificial layer to the metal. I found out that too much of the moly will create problems; lack of this material reduces the effectiveness of the ZDDP. The percentage, by weight is from .01 to .02%, not much, but necessary.
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Last edited by auskip07; 06-19-2012 at 11:06 PM.
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