Originally Posted By: gfh77665
Much debate went into this topic (on this board as well as others), and the consensus was that monthly starting was good if and only if temp was allowed to reach normal "hot" level. I ran at 1500-2000 RPM's, to simulate driving as much as possible. Also, 97' has EFI, not carburation, so that helps tremendously as far as dilution is concerned. Stabil was used, too.
Although I respected all opinions, I chose to start monthly. Seems to have worked perfectly, so far.
In any case, I am thinking of using this Mobil 1 as lawnmower oil. Ideas welcome.
My concern would be that relying solely upon the
coolant temp indication is absolutely no guaranty that the
oil temp got hot enough to boil off excess water, fuel, or both. We've had several members who are equipped with coolant and oil temp gauges who report (as I've understood to be the case) that the oil temp rise usually lags substantially behind the coolant temp.
You're probably just fine using that M1 in a mower. If you really want to get beyond simply tabulating the opinions of the members of various boards, do a one-time UOA. I'd even pony up the extra $10 or so for a TBN. Armed with this information, you'd
know if your plan for caring for the truck is viable, AND whether that old oil will be good for your yard equipment.