This is the official manual for the latest Org-mode release.
The LaTeX export back-end can use any of these LaTeX engines:
‘pdflatex’, ‘xelatex’, and ‘lualatex’. These engines compile
LaTeX files with different compilers, packages, and output options. The
LaTeX export back-end finds the compiler version to use from
org-latex-compiler variable or the
#+LATEX_COMPILER keyword in
the Org file. See the docstring for the
org-latex-default-packages-alist for loading packages with certain
compilers. Also see
org-latex-bibtex-compiler to set the bibliography
 This does not allow setting different bibliography compilers for different files. However, “smart” LaTeX compilation systems, such as ‘latexmk’, can select the correct bibliography compiler.