Found a few more. Let's not leave anyone out.
ACURA:
Another Crummy, Useless, Rotten Automobile
Asia's Curse Upon Rural America
AMC:
All Makes Combined
Another Major Catastrophe
AUDI:
Awfully Unsafe Designs Implemented
Accelerates Under Demonic Influence
BMW:
Brutal Money Waster
Born Moderately Wealthy
BUICK:
Big Ugly Imitation Chrome King
CHEVROLET:
Constantly Having Every Vehicle Recalled Over Lousy Engineering Techniques
DODGE:
Drips Oil & Drops Grease Everywhere
Daily Overhauls Do Get Expensive
EDSEL: Every Day Something Else Leaks
FIAT:
Failed Italian Automotive Technology
Feeble Italian Attempt at Transportation
FORD:
Fabricated Of Refried Dung
Fault Of R&D
Forced On Reluctant Drivers
Formed Of Rejected DNA
Fumes and Odors Readily Detectable
(backwards) Driver Returns On Foot
GEO: Good Engineering Overlooked
GM:
Generally Miserable
Grossly Misconceived
GMC:
Generally Mediocre Cars
HONDA:
Had One Never Did Again
Hallmark Of Non-Descript Automobiles
HYUNDAI: Hope You Understand Nothing's Driveable And Inexpensive...
JEEP:
Junk Engineering Executed Poorly
MAZDA: Most Always Zipping Dangerously Along
MIATA: My Intention: Always To Accelerate
MOPAR:
Mostly Old Parts And Rust
My Only Problems Are Repairs
MUSTANG: Motor Under Strain, Transmission Almost No Good
OLDSMOBILE: Overpriced, Leisurely Driven Sedan Made Of Buick's Irregular Leftover Equipment
PINTO:
Put In Nickel To Operate
Paid Inspector Nicely To Overlook
PLYMOUTH: Please Leave Your Money Out Under The Hood
PONTIAC: Poor Old Numbskull Thinks Its A Cadillac
PORSCHE: Proof Of Rich Spoiled Children Having Everything
SAAB:
Swedish Automobiles Always Breakdown
SUBARU: Screwed Up Beyond All Repair Usually
TOYOTA:
Too Often Yankees Overprice This Auto
Torturous On Your Old Tired A**
The One You Ought To Avoid
TRIUMPH:
This Really Is Unreliable Man, Please Help!
VOLVO: Very Odd Looking Vehicular Object
VW: Virtually Worthless