So an oil temperature gauge isn't more helpful than a oil pressure?

Depends on your needs and wants, for this issue perhaps a temporary pressure gauge might be useful, a temperature gauge less useful.  Neither is needed and the car has survived decades without either.  An oil temperature gauge I think is useful on modern (and old) cars if the cars do lots of short very journeys as it might show the owner/driver that the oil doesn't get fully warmed by those very short journeys which isn't good for the oil that helps look after the engine.

  

Last year with the 5W-40 i had a red light dashboard warning for 2 seconds in cold starts, @R_Blue has not so may i assume that has not any oil pressure issues with the existing engine oil that has?

Short answer from me, no you can't.

On 09/07/2024 at 10:49, D.FYLAKTOS said:

Last year with the 5W-40

with 15W-50 i have red light for less than 500msec

1 hour ago, Thefeliciahacker said:

with 15W-50 i have red light for less than 500msec

 

With 20W-50 in 300msec and with 20W-60 in 100msec.

Tested, approved and with certification in a frame for the wall in the house.

 

You can get different results with different oils that meet the same weight number be it 5w-40 or whatever.  I use 5w-40 number(s) as an example number(s) only.  One 5w-40 can be a lot different to another 5w-40.  it might be that some, none or all of a particular weight number suit a particular engine.  Some oils can move out of their stated number particularly in protracted use, a 5w-40 may soon become a 5w-30.  There are many variables things aren't cast in stone.  There can be generalisations, these old design engines may not generally suit "thinner" oils.   One, say 5w-40 again, engine oil may be "thinner" than another 5w-40 oil particularly in use and extended use.

 

Try getting that certificated. 😆  It's almost (not) poetry.  🤣

 

For @R_Blue and others (conformation bias is also discussed at the very start) a video about ZDDP (zinc) and diesel oils.  The sound quality unfortunately isn't great and I have no idea how well any subtitle translations would cope with some of the words and descriptions.  I watched a video yesterday with someone that speaks very clear English and the English subtitles (which I could not turn off) were getting some very simple and clear words totally wrong making nonsense of what was actually being said (such is the future?).

 

 

 

Edited 27 July, 20241 yr by nta16
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