I thought that the handbook that came with the car was not original because it was dated 1984 and did not have the 535is on page 3 (only 528e, 535i, 524td). The cover shows the front grill and I thought I saw another cover on some site. But then I saw an oil service record in the back for 1/88. Can someone clue me in on what the 87 handbook looks like?
Also, would it be a good idea to switch to synthetic oil? Engine has 250k miles.