Hi,
2012 R58 N18 S 66k miles. Compression readings are 160 165 160 160. Trying to get an idea what typical readings are for a like motor/miles and how worn this is.

Was told new, reading is 190psi. Burning oil bad is 110-120psi, and replace is 90psi. I don't know if wear is linear. Is 190 - 120 = 70 the "wear interval" before burning a lot of oil? If so is my 160psi at 190 - 30 = 40psi on the 70PSI interval. So 40 is just a bit over half the 70 psi interval from new to to high consumption? I guess it all comes down to linear or not wear of rings.

The MINI burns 1 quart over 1,900 miles. Seems much for the N18 as we have a 155k R60 that burns 1 quart in 3000 miles, and a 2011 R55 that burns 1 quart in maybe 4k miles. The R58 had a Manic tune for about a year. (it is new to us, just reset to factory software as it failed emissions).

Any input would be helpful!

 

Compression readings will vary according to the equipment used. My harbor freight set reads 120 - 140, while my tuners set read 160's. Then there's hot vs cold readings. If you're getting minimal oil burning, don't worry about it. Main concern is readings that vary more than 15% from each other.

 

^ this. Those readings are GTG.