jrr wrote:.... heck with it bought the Dinan 335.
Congratulations on the 335.
The Infiniti salesman shortchanged the G37. It's a much better car than you were led to believe. I get loaner G37s when I take my G37S coupe in for service. No transmission lag. It doesn't shift as quickly as I would like, but it's not bad for an automatic.
Suggestion for the 335 based on advice from the independent foreign car shop I have patronized for 30 years.
Ignore BMW's long oil change intervals. Use synthetic as recommended, but change the oil and filter at least every 5k miles. If you do mostly low speed city driving, make that 3k to 4k miles. According to my independent, BMW sixes are prone to sludge. If you go as long as BMW suggests between oil changes, your 335 will be full of sludge up and burning oil before 100k miles. In my opinion, BMW is focused solely on customers who lease or trade their cars as soon as the warranty expires. If you plan to keep yours past 100k miles or care about the next owner, change the oil more often. BMW won't include extra oil changes in their free maintenance program; you will have to pay for them yourself. Either do them yourself or take the car to a good independent shop.