Most of the differences in building engines for off road SCORE or desert endurance racing purposes, say experts, concern the endurance factor. The annual Baja 1000 is actually 1,300 miles of punishing off-road racing. The winner will take 25 or 26 hours to complete the race, so the engines have to last for that long.
If you leave leftovers or any food out too long, it will speed spoilage. Two hours is generally the max they should be left out, though the sooner you refrigerate them the better (remember to factor in the time it takes to drive back from the grocery store, and the time it takes you to unpack your groceries).
The real answer is a bit more nuanced. You will get the very best flavor and quality from a jar that is in its first year, but thereâs no internal self destruct devise inside the jar that goes off on day 366 or 367. Preserves older than a year are still safe for consumption.