It can be harmful when the oil is not moving through the engine when you just fire up and go right?
2007-03-05 12:44:17 · 9 answers · asked by dubsperformance 1 in Cars & Transportation ➔ Maintenance & Repairs
Normally by the time you have conducted your pre-flight checks and taxi clearance your engine will be fine - and so long as your temps and pressures check out fine, then take off as soon as you have clearance.
2007-03-05 12:48:34 · answer #1 · answered by Mark T 6 · 2⤊ 0⤋
Yes, parts wear out faster....but it matters too on how long it has been shut off. A car that has been shut off 8 hours or a car that has been shut off a month (or several years).
When the engine runs oil gets splashed and forced everywhere there is moving parts. So take something like the cylinder wall...oil get splashed on it when the piston is not there. Stop the engine. Hot oil is dripping off the wall (gravity). How long does it take to completely come off? It doesn't.....but the film gets thinner and thinner over time.
For the oil lines, the oil pump keeps it pressurized while the car is running to go to higher places that splashing won't reach, and the oil lines have holes up there that allow some oil to escape and dribble down onto parts. Oil is also the cushion between bearings.
For the 4 cylinder engines- they are much smaller than V8 engines or straight 6's. Those engines, give them at least 30 sec. For the 4 cylinder from overnight, 10 sec ought to do you.(basically the time it takes to put on your seat belt and adjust your mirror.
2007-03-05 21:12:18 · answer #2 · answered by ButwhatdoIno? 6 · 0⤊ 0⤋
Oil is moving through the engine when the OIL light goes out (or the gage moves to normal range). That should be within 2-3 seconds of startup.
DO NOT idle the car for 5 minutes, it's hard on the engine, very polluting and wastes fuel... and a waste of your time. People did that in the 70's because it made old carbureted cars more driveable. It has no benefit on modern cars, people do it because they have no clue.
For you, in your modern car, give it maybe 10-20 seconds, start driving, but drive gently if you care about the vehicle. The engine hasn't reached operating temperature yet, so tolerances inside the engine are all funny. (drag racers launch their quarter-mile with ice cold engines, but then, they don't get 100,000 miles out of their engines either.)
Non-synthetic oil is prone to get "too" thick at very cold temperatures. If it is VERY cold, then drive very slowly and carefully for the first 5 minutes, and watch for an "oil" light. Shut the engine off instantly if it comes on, because that's a sure sign that too-thick oil has broken the oil pump drive. Solution: synthetic oil.
By the way, one of the airlines has decided to NOT start their jet engines until they're ready for takeoff. They plan to tow the airplanes out to the runway. That's to save fuel, smog and engine hours.
2007-03-05 20:52:58 · answer #3 · answered by Wolf Harper 6 · 1⤊ 0⤋
not too long like 5 sec. but you normaly dont take off that fast. in the winter let it run like 10min so the engine can heat up a bit cause the cold will make the oil like syrup and it wont flow as easily.
2007-03-13 04:26:04 · answer #4 · answered by demo_steven 1 · 0⤊ 0⤋
I agree with all the answers given, if it is cold outside and there is snow all over, let it warm up for five minutes, during this time you can be walking around clearing the snow. Now, if it is a warm day, than two minutes will be fine.... just don't speed up down the highway... ... Have a great drive..
2007-03-05 21:07:42 · answer #5 · answered by DVP 2 · 0⤊ 0⤋
Drive it right away but slowly.It will warm up faster this way. It will save gas and be more green. Modern oil gives good protection to engines.
2007-03-13 19:10:40 · answer #6 · answered by delbeglenda 2 · 0⤊ 0⤋
in 1920 you be right
but todays cars have sensors,control moduals,and years of trail and error ,but it always a good idea to let it run for atleast 5 min in winter so it will not be cold inside,but do this outside the gaurage so theres no carbon monoxide poisoning left after you pull away,its deadly
2007-03-05 20:52:38 · answer #7 · answered by game boy 3 · 0⤊ 0⤋
Usually when it's in the negative temperatures I let it warm up for 5-10 minutes. Other than that usually a minute or two.
2007-03-05 20:52:30 · answer #8 · answered by Jeremy G 4 · 0⤊ 0⤋
yes.. if its cold.. definetely let it warm up.. in the warmer months you can wait a few minutes.. about the time you get your seat belt on and make sure you get your oil changes when you should...
2007-03-13 18:04:21 · answer #9 · answered by notaclue 2 · 0⤊ 0⤋