Is Auto Stop and Auto Start Bad for an Engine?

mcrimm said:

I think what you may be concerned about is that the engine oil will drain into the pan after the engine has sat for a long period of time. I don’t think this would be a concern with a short rest period.

I’m not concerned.

Click to expand...

mcrimm said:

I think what you may be concerned about is that the engine oil will drain into the pan after the engine has sat for a long period of time. I don’t think this would be a concern with a short rest period.

I’m not concerned.

Click to expand...

Nipper Dog said:

I've always heard that the worse thing you can do to an engine is to start it. I'm wondering if that includes engines that were designed to stop and start automatically at lights and stop signs.

Another related issue is whether constantly starting the engine will shorten the life of the starter.

Any opinions?

Click to expand...

Nipper Dog said:

I've always heard that the worse thing you can do to an engine is to start it. I'm wondering if that includes engines that were designed to stop and start automatically at lights and stop signs.

Another related issue is whether constantly starting the engine will shorten the life of the starter.

Any opinions?

Click to expand...

Nipper Dog said:

I've always heard that the worse thing you can do to an engine is to start it. I'm wondering if that includes engines that were designed to stop and start automatically at lights and stop signs.

Another related issue is whether constantly starting the engine will shorten the life of the starter.

Any opinions?

Click to expand...

19BCPDave said:

Some food for thought.... Modern vehicles equipped with Start/Stop technology utilize reinforced starters coupled with High Capacity AGM batteries that aid in making sure the vehicles electrical system is essentially stress free. In addition, when the engine shuts off, the engine management system keeps track of the exact position of each piston. It can then restart the engine by spraying fuel directly into a cylinder (Direct Injection) that is just at the start of its power stroke and firing the spark plug to ignite the mixture. This will eliminate the need for the starter every time the vehicle starts from a stop (this does mean that the engine must be 'warm' as higher cranking amps are required to start a cold engine). Hope this helps....

Click to expand...

Nipper Dog said:

Thanks, that helps a lot! I do need clarification on one point though; you say "this will eliminate the need for a starter every time the vehicle starts from a stop...". Can you go into more detail about this? Does this mean that the engine can restart without the use of the starter?

Click to expand...

19BCPDave said:

Yup! Thats correct.... At any given time there is at least one cylinder ready to start the power stroke (4 stroke cycle- suck - squeeze - bang - blow ?) and all that cylinder needs is a rich A/F mixture coupled with the ignition from the spark plug to get the rest of the engine fired right up.

Click to expand...

CAJack42 said:

I've never seen the Honda description of their system, but here is a good explanation from Mazda;

MAZDA: Idling Stop Technology | Environmental Technology

Idling Stop Technology. At Mazda we are always working hard to develop environmental technologies which will contribute to an exciting and sustainable future for people, automobiles, and the Earth. [MAZDA Official Web Site]

www.mazda.com

Click to expand...

86caddytoo said:

I hate the auto stop “feature?” I always turn it off.

Click to expand...

herothedog said:

I am fairly certain auto-stop vehicles have an electric oil and water pump so fluids continue to circulate (at least in two other cars I have had this is true, you can hear the pumps operating).

Click to expand...