Originally Posted By: Boss302fan
Newer 90's plus vehicles should be turned off if idling more then 30 seconds. Just my opinion... Startup on older vehicles can pass a lot of fuel into the oil.
What do you do at a long traffic light, say one minute long, shut the engine off? Letting an engine idle for more than 30 seconds isn't going to hurt it. If it is I ruined a lot of engines in my day, which dates back to engines from the 1960's, 70's, 80's, 90's, up until 2008.