Vehicles are a frequent topic of discussion on the various O and S gauge train forms. At times these discussions can get rather heated.

Since use on train layouts is rarely the objective of the companies making various diecast vehicles, there's no true right answer to what one should or shouldn't use. This is my personal philosophy. Take it for what it's worth.

I run prewar and postwar Lionel and Marx trains on my layout, primarily. Most of them are undersize O27; I only have a handful of American Flyer cars that might perhaps approach proper 1:48 O scale.

Prior to the early 1970s, Lionel paid no particular attention to scale. Therefore I see little need to break out the scale ruler and be a Nazi about what vehicles will and won't go on my layout. A Lionel 6014 Baby Ruth boxcar is very close to 1:64 scale, although it's riding on trucks that are very close to 1:48. The famous Lionel 6464 boxcars are about 1:55 scale. Marx had a whole line of 1:64 scale O gauge trains; its cheaper plastic cars are also very close to 1:64. Some of its "deluxe" cars were closer to 1:60--somewhere in between the Lionel 6014 and 6464 in size. Maybe making them bigger than the 6014 for about the same price made them seem to be a better value for the money.

And for that matter, while A.C. Gilbert's American Flyer division paid more attention to scale, Gilbert wasn't shy about shipping off-scale stuff with the American Flyer name on it either. The trains themselves were pretty close to scale, but many of the accessories and buildings were too large or too small.

Needless to say, it doesn't bother me then that a Matchbox VW Beetle is 1:55 scale but a Matchbox model of a larger vehicle, say a '57 Chevy, will be 1:64 or perhaps even a bit smaller. If it's the right era, I'll use it.

Besides, park any of them outside a Plasticville ranch house, and it's clear to anyone that it'll fit inside that garage. Therefore, it will look believable.

I do pay attention to era. Even a casual passer-by can tell the difference between cars from various decades. And I do think era sets the tone of a layout, so I draw my line at 1949. Postwar fans have it easier, as there are tons and tons of great vehicles from the 1950s and 1960s available. Since I stick to pre-1950, generally speaking I can only count on each manufacturer of Hot Wheels and Matchbox type cars offering one or two vehicles per year that I can use. If I drew the line later, I could probably find a couple dozen cars per year to buy.

Many cars have to be modified to suit my purposes, since I want everyday city street scenes, not a hot rod convention. In the case of the Hot Wheels '32 Ford Delivery sedan I picked up at Kmart tonight (along with baby formula and a cordless phone--you gotta love it), the car is pretty tame. No jacked up wheels, no overly funky colors. It does have flames. Remove the flames with some nail polish remover or purple cleaner on a cotton swab, and I can probably pass it off as stock to a casual observer. Other times, it's necessary to drill out the rivets on the bottom, swap out the wheels for more conservative ones, and maybe even strip and repaint the vehicle.

According to a car buff on an S gauge board I read frequently, prior to WWII cars tended to be painted dark shades of green, brown, blue, red, and black. Fenders might be a different shade of the body color. After WWII, the colors lightened up and two-tone paint jobs became popular.

The need to swap wheels means sometimes you have to buy cars just to get their wheels. So I'll look for cheap vehicles with conservative-looking wheels to use as donors. This adds cost, but consider some people pay $20 and up for each vehicle on their layout. Compared to that, it's still cheap.

Some people get irritated at having to modify vehicles before using them on the layout. It doesn't bother me all that much. I think it's part of the fun, and the result is that I have vehicles that don't look like anyone else's.