Jim,
Below are three quotes from the first link posted by Volkeman in his earlier post; note quote number 3. Looks like Doug's (and your) speculation may be valid.
"There are currently four different versions of OLM being used and each has its own operational characteristics. Some OLM’s are more sophisticated, or intelligent, than others, but they will typically take into consideration the factors that can affect the engine oil life in both a positive and negative way."
"General Motors (GM) started using this type of OLM (GM calls it GM Oil-Life System, or GMOLS) back in 1998 and based the need for an oil change heavily on the number of engine revolutions and operating temperature."
"Ford’s Intelligent Oil Life Monitor (or IOLM) is also a software-based OLM that calculates when an oil change is required — very similar to the GMOLS, but the Ford system incorporates a timer that will turn on the oil change required light after one year has passed."
Also, on the Trik-L-Start. Mine (installed by Phoenix), is wired directly on-line. If I cut the main house battery switch, it kills the feed to the Trik-L-Start; otherwise, it gets a constant feed from the house batteries.
Mike