wait so are you saying that we should not let our cars have an idle warm up? i always do this and thought that it was the right thing to do....bop08 said:Car mfg's hate remote starts. It usually means that someone starts the car and lets it idle for 15 or more minutes while it warms up. A driven car will warm up with in a very few minutes. During warm up, the engine needs to run rich (remember the old chokes)? Running rich washes the oil off the cylinder walls starving the rings of lubricant which leads to wear and then oil burning. Even with circulating coolant heaters and oil pan heaters our cars, in Big Delta Alaska, (-72 °F), were shot in one winter because of lack of lube. The viscosity of even multiweight is high at 20°F. Plus, note that when you shift to R or D the engine drops off high idle even if you just started it.
At 80 K miles, when the car starts to show signs of cylinder scoring, the Mfg can prove that it was the unattended warm-up but it probably was.