40 might be a tad too slow, but for a car like that it shouldnt be a problem if ur just "cruising" and dont need pulls. im in 2nd gear at 40 mph man lol
for older weaker cars she's right.
this thread is hella helpful
Official Learn To Drive Manual Cars Thread - BMW 3-Series (E90 E92) Forum - E90Post.com
btw where's the 707 area code?