15 W 50 API SL Semi Synthetic
Because I am getting near to an oil change, the manual does state as above but also
15W 50 API SL Grade
JASOMA ESTER Semi Synthetic oil.
Now my question is, is this a grade of semi synthetic or is there a choice of an ordinary oil or semi synthetic
I.E. 15w 50api sl grade
or Jasoma Ester semi synthetic.
I need to be sure in case the dealer slips in an ordinary oil, when it should in fact be a semi synthetic.( when originally asked he said, Oh! I just put in "so and so" but it did'nt sound like a semi synthetic to me, and he may have been thinking that the oil that went into older previous models would do,
Cheers