Mayonnaise

[cruiser132]

Hey All,

This morning I was cleaning up the X and decided to check the oil level. After pulling the dipstick, it looked to be a little low, needing 1/2 quart. When I removed the engine oil filler cap, I noticed a small build up of yellowish paste, almost mayonnaise in consistency.

I recall from earlier posts that this can be an indication of water/coolant mixing with the oil, resulting from a gasket or valve leak. The X's is running smoothly, no blatant tell-tale signs of problems. I'm just wondering if I should take it by the dealer for diagnosis or repair.

When the oil was changed in October, I used Mobil 1 0w-40, instead of Castrol 5w-30, could this issue with the mayonnaise-like build up be a result from that? By the way, the X is CPO'ed til the end of this month. Thanks for your thoughts.