I get the impression that these engines wear out quickly

[Jeph]

Originally Posted by Paul

In accounting terms m = 1000, mm = 1,000,000

And in Roman Numerals, M = 1000, MM = 2000

However, accounting terms are generally associated with currency. Furthermore, "m" could also be "meters" or "miles." All in all, an ambivalent abbreviation.

I like the commonly used "100k" which hopefully won't get confused with 100 kilometers. And watch out for "100K" which would be 100 degrees Kelvin <- And that would be a COLD engine, not an OLD one.

What a tricky world of grammar we live in!
-I mean, "What a tricky world of grammar in which we live!"