1) It is not true. I have evidence to the contrary. My wife drives
normally leaving the car in automatic always. I always down shift the
automatic transmission when slowing down. This would be much worse than
leaving in automatic if what your friend says is true. However we get
the same gas mileage exactly so what your friend says is absolutely
false.
2) It is also harmful to the car. Read the manual. It says to never tow
an automatic transmission car at highway speeds. That is the same as
coasting with the transmission in neutral. It can damage the
transmission.
3) It is illegal in most every state, maybe all.
--
Pardon my spam deterrent; send email to rhodyman@earthlink.net
Cheers, Steve Henning in Reading, PA, USA
Owned '67,'68,'71,'74,'79,'81,'87,'93,'95 & '01 Volvos.
The '67,'74,'79,'87,'95 and '01 through European Delivery.
http://home.earthlink.net/~rhodyman/volvo.html