Table 4. Correlation between Studied Variables and Principal Components^a.

variables	F1	F2	F3
saturates	0.959	0.172	0.143
aro 1	–0.837	0.306	–0.414
aro 2	–0.563	0.788	0.073
aro 3	–0.021	0.647	–0.739
resins	0.384	–0.637	–0.617
asp 1	–0.750	–0.509	–0.321
asp 2	–0.847	–0.464	0.019
asp 3	–0.549	–0.032	0.811
oxidation time in PAV	–0.009	–0.713	0.110

^aBold values are values greater than at |0.620| and considered significant.