good cars maintainance and performance wise? the cars i am looking at are Park Avenue, Century, LeSabre, and Regal are they good what about their engines, body, frames and so on.
I personally wouldn't expect 300k out of any car. A Buick or other GM will likely be OK for 150 to 200k if you maintain it properly and do not abuse it. I have 177k on a Mercury Sable and feel I have done well. I have put 350k plus on a couple of diesels (Merceded 300SD and Volkswagen Sporttruck) but they were exceptionally well cared for. If you have to get 200k out of your car, look at a Honda Accord or Toyota Camry.
89 90 91 92 93 94-05 BUICK PARK AVENUE AVE/REGAL 3.1 3.1L/3.8 3.8L V6 AIR INTAKE, Buick Emblem Tyre Tire Valve Stems Caps Air Dust Covers Anti-Theft Locking 4pcs, 92-99 Buick LeSABRE PARK AVE ROADMASTER REGAL 15" hubcap wheel cover GENUINE OEM, GM 16'' wheel Buick Regal, Park Avenue OEM, 86-99 Buick LeSabre Century Park Avenue Wire Center Wheel Cap Hub Cap Cover OEM, 93 - 99 LESABRE PARK AVE REGAL ROADMASTER OEM WIRE WHEEL COVER HUBCAP NICE #DG8, 22" VCT GRAZIANO WHEELS RIMS TIRES 5X115 BUICK PARK AVENUE REGAL CENTURY LESABRE, DOOR LOCK SET DL7B REGAL SKYLARK PARK AVENUE NEW!, 95-02 Buick Am Fm Radio Cd Cassette Player Regal Park Avenue Lesabre 16249434 *, Gas Cap Buick 1975-97 Apollo Century Electra Lesabre Park Avenue Regal Riviera, Lesabre Roadmaster Park Avenue Regal Hub Cap Wheel Cover LKQ, Lesabre Roadmaster Park Avenue Regal Wheel Cover Hub Cap, Lesabre Roadmaster Park Avenue Regal Wheel Cover LKQ Hub Cap, Lesabre Roadmaster Park Avenue Regal Wheel Cover OEM Hub Cap, Buick Emblem Tyre Tire Valve Stems Caps Air Dust Covers Anti-Theft Locking 4pcs, 1989-1992 BUICK LESABRE PARK AVE REGAL OEM GM 15 INCH WIRE SPOKE HUBCAP , Buick Regal (2004) Rotors & Ceramic Brake Pads F+R, Buick Regal (2003) Rotors & Ceramic Brake Pads F+R, Buick Regal (2002) Rotors & Ceramic Brake Pads F+R, Buick Regal (2001) Rotors & Ceramic Brake Pads F+R, Buick Regal (2000) Rotors & Ceramic Brake Pads F+R, Buick Regal (1999) Rotors & Ceramic Brake Pads F+R, Buick Regal (1998) Rotors & Ceramic Brake Pads F+R, Buick Regal (1997) Rotors & Ceramic Brake Pads F+R, Intake Manifold Regal Riviera Lesabre Park Ave 3.8 3800, 95-02 Buick Radio Cd Cassette Regal Century Park Ave Lesabre 25742420 OEM PL * , 89-00 01 02 03 04 05 BUICK PARK AVENUE AVE/REGAL 3.1 3.1L/3.8 3.8L V6 AIR INTAKE, 1995 Buick 86-page Original Sales Brochure Catalog Roadmaster Park Avenue Regal, KEYLESS REMOTE 93 94 95 BUICK LESABRE CENTURY REGAL PARK AVE 25602667 ABO0303T , 15 INCH BUICK HUBCAP,1992-1999 LESABRE,1999 PARK AVENUE, 1993REGAL OEM,