I premix with 1 oz Idemitsu per gallon and cant see a drop on my dipstick over 2000 miles which is my oil change interval since a 5 qt jug of conventional oil is only 20 bucks I change it often. 2 oil changes to 1 filter change, ie change filter every other oil change, 4000 miles on the filter, using a Bosch Distance 3300 filter which is 99.9% efficient they claim and holds 10x the debris of a normal filter. I don't see a change on dipstick but on chnage its 5 qts in and refill jug with old oil which seems to only fill back up to 4 1/2 qts but I don,t see the change on the dipstick but I could be overfilling possibly as the out to in says I'm using oil between changes. I can see the difference in oil color in the OMP feed lines old oil to new oil so they have to be flowing right?? And my coolant level never changes except for the hot to cold difference but they always go to same level each way so I know I'm not using coolant, no foam under oil fill cap either which usually means no water is getting into the oil system

 

Think about how premixed fuel would make it into the sump. Now think about the fact that 2 stroke is formulated to burn, and to burn ash free.

 

Alright so i was able to gain access to the lines, and attempting to clear with seafoam, but it doesnt appear to be sucking any up. I do have the AEM CAI so the vacuum hose is in a different place, but im fairly certain i found the right one. My buddy also started my car a little bit early before i could get the line in the seafoam, so could that be the reason it isnt working? Thanks for the help guys!

 

Get it checked. Better safe then sorry!

 

I disconnected my omp 6 months ago and have been premixing at 100:1 ever since. The first time I checked my oil I was like "I must have overfilled on the last oil change ..... but I swear I only put in 4L ..... WTF "
Today I checked it again about 2000 kms after my last oil change and oil level is well over the full mark again.
So I started reading up on this and find it's pretty common when premixing heavily. Guess I'll need to change my oil a lot more regularly from now on.

For reference:
Engine runs E30 and is boosted