[rusnak]

Kudos on having a wife with great taste in vehicles.

As I said, I follow the manufacturer's lubrication and service chart as much as I can - meaning that I get hold of the service manual and follow it to the letter. Cars now are engineered to such a high degree that you really must follow the specs, with but a few exceptions. I do the same with everything that I own: tractor, ATV, lawn mower, pressure washer, water pump, etc. I am sort of amazed at how specialized oils and greases are now, but they really are. Back in the day I'd have put whatever oil I had into the pressure washer. Today, that would wreck a $4,000 pressure washer because I'd need a new pump.