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Will engine oil get up to temp even though coolant isn't?

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fsgti:
May be an obvious question but isn't clear cut to me.

I'm pretty certain I have a thermostat issue where it's stuck open and hence it takes ages for coolant temp to reach 90 degrees. Prior to this it would sometimes drop from 90 to around 80-85 and then rise back up.

Anyway cutting to the question:
Even though the coolant may not be up to temp, the engine oil surely should reach normal operating temp after 5-10 mins of driving regardless of the coolant temperature, right?

Clarkj93:
If you're asking if you can get away with not fixing the answer is no really. Not that you can't drive it like it is but you should do it within a reasonable time. Not sure what the engine temp would be unless you ran some logs, it would be at the very least warm but maybe not "up to temp".

fsgti:

--- Quote from: Clarkj93 on December 04, 2022, 05:45:04 pm ---If you're asking if you can get away with not fixing the answer is no really. Not that you can't drive it like it is but you should do it within a reasonable time. Not sure what the engine temp would be unless you ran some logs, it would be at the very least warm but maybe not "up to temp".

--- End quote ---

What mechanical damage could be done to the engine from 'overcooling'? I'd understand if it was stuck open as that leads to overheating and thus catastrophic damage. I guess I should probably just wait much longer than usual before going well over 2000 rpm.

TheBALDpuma:
In my experience you will get worse economy with a stuck open thermostat, so eventually it will pay for itself so just get it sorted.

If the engine isn't at normal operating temp you'll be putting more wear on moving components too

Clarkj93:
Yeah you gotta get it fixed really mate. Its a faff if you do it yourself or expensive if you don't but needs to be done at some point soon really. It's like missing an oil change - yes you can still drive it, no its not going to blow up by just missing an oil change interval but you're just potentially decreasing the life of your engine or asking for trouble by neglecting it.

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