Okay, let's see:
1967 Fairlane Fastback: 2 years
1967 Thunderbird: 1 year
1982 Mustang Ghia hatch: 24 hours
1980 Mustang coupe: 4 yrs
1978 Mustang King Cobra: 1 yr
1979 Lincoln Town Coupe: <1 year
1962 Lincoln Continental: 5yrs
1971 Lincoln Continental: 3 yrs
1962 Mercury Comet S-22 Coupe 144 I-6/2-speed air cooled auto: <3 yrs
1988 Thunderbird Turbo Coupe: 4 yrs
1987 Mustang Hatch 2.3L 5-speed T-Tops: 3yrs, sold, bought back (added T-Bird Turbo suspension): 2 yrs
1969 Mercury Cougar 351-W auto: 3 yrs
1986 Ford Crown Vic (ex-police car): 1 yr
1979 Toyota Truck (20R/Auto/Long bed/2wd): 7 yrs
1985 Chrysler Fifth Avenue (318 auto): 5 yrs
1987 Thunderbird Turbo Coupe: 2 yrs
1993 Thunderbird Sport 5.0: 3 yrs
1995 Yamaha FZR600 Sport Bike: 2 yrs
1988 Lincoln Town Car: 4 yrs
1986 Lincoln Town Car: 2 yrs
1988 Ford Ranger 2.0 5-speed 2wd: 4 yrs
1994 Ford Explorer 4x4: 4 yrs
1996 Lincoln Mark VIII: 10 yrs
1997 Lincoln Mark VIII LSC: 2 yrs
There have been several more, but that's all I can remember off the top of my head right now. I've had a bunch of cars that I bought just to sell and only kept for a month or two. That was back in the 90's and hard to remember. But the ones listed are the most memorable of my vehicles (I didn't list the '96 Cobra because that's my wife's car
)