Oil analysis on IO-520A

[PeterNSteinmetz]

Question for the engine mechanics.

I am looking to purchase a share of a Bonanza with an IO-520BA high time engine. It is running great but is past TBO at 1843 both since overhaul and new.

Oil analysis performed for past 3 years shows some normal values for Nickel and Chromium, but higher than what is on the engine in my Cardinal. To wit:

Nickel 2018 - 11, 2019 - 10, 2020 - 14
Chromium 2018 - 6, 2019 - 6, 2020 - 8

Does this set off red flags? It is priced for the TSMOH accordingly and clearly the hours past overhaul are just a bonus.

 

[PeterNSteinmetz]

Thanks for the replies. In answer to some queries:

The partnership is being formed and will fund the reserve at a fixed rate per flying hour.

The values are from a single oil analysis at change with the annual. It has only been flown about 30 hours per year.

The exhaust valve in one cylinder was replaced but apparently the rest of that cylinder and others is original. Borescoped each annual with no signs of other problems.