You did not state what year your F15 is, whether it is gas or diesel or what specific AMSOIL product code you used.
Based on the information you provided, I am assuming your's is either a 2014 or 2015 gas motor and you used AMSOIL product code EFOQT-EA.
I consider oil to be a critical component of the engine and as such tend to stick with what the manufacturer recommends/uses and agree with
Silververtu; why not just use the BMW oil given the cost?
Assuming that the previous oil was of manufacturer specification and was a 0W (winter) weight, then the viscosity should be pretty much the same and certainly not of a significant difference that you would feel it in performance or rolling resistance.
I know you stated that you did your research and I'm not trying to be an
, but only offering an opinion in an effort to help you and others that may read this thread. If your vehicle is a >2016, then this oil does not meet current specifications.
This is the product information I found for AMSOIL 0W40 European Formula, product code EFOQT-EA here:
https://www.amsoil.com/lit/databulletins/g3395.pdf
The AMSOIL 0W40 carries "
API SN/SM" and "
BMW Longlife-01" approvals which is not the same approval as "
BMW Longlife-01 FE" according to the BMW manual after 2016. The only "
suitable engine oil types" approved by BMW will have "
BMW Longlife-01 FE" approval for gas motors and "
BMW Longlife 12 FE" approval for diesel motors.
This is further supported by the AMSOIL website when you search for a 2016 or later F15 X5:
https://www.amsoil.com/lookup/auto-a...rbo/us-volume/
For motors >2016, the AMSOIL oil does meet the listed "
alternative engine oil types", but the manual also states that only 1 quart should be added. Many would say it does not make any real difference and you may agree; my opinion differs. For my money, I would stick with an oil that has the specific approval and for similar cost, would just buy the BMW branded product.
