Engine oil change - what can go wrong

[Beregond]

On 12/26/2023 at 4:01 PM, Gnahp said:

it's quite normal actually

that is why over the years I learnt not to trust the capacity on the label

although I never encounter one that has more than 100%

maybe I suay 😁

Actually I believe they really did fill up 5l.?

If u hang the btl upside down and let it drip to the last drop. Can get 5l??😂

[Gnahp]

On 12/26/2023 at 4:20 PM, Beregond said:

Actually I believe they really did fill up 5l.?

If u hang the btl upside down and let it drip to the last drop. Can get 5l??😂

speaking of which

last time I did an experiment

after draining the engine oil, I let the engine drip overnight 

next day only collected about a cup of espresso worth of oil 

 

[boonhat_91]

Sorry to piggyback this thread.. just curious how do outside workshop know what's the correct quantity of engine oil to fill up? I don't suppose they would refer to the manual just for a simple oil change job.

[Gnahp]

unless the car has on-board engine oil level display and warning system 

otherwise overfilled or underfilled, owners also won't know

how many owners will pull out the dipstick to check oil level nowadays? 😁

MIN to MAX takes 1L, plenty of buffer for error 

[Mkl22]

On 2/24/2024 at 6:04 PM, boonhat_91 said:

Sorry to piggyback this thread.. just curious how do outside workshop know what's the correct quantity of engine oil to fill up? I don't suppose they would refer to the manual just for a simple oil change job.

Typical 1.6 engines are 3.5-4L. 2.0L engines 4-5L. 
experienced mechanics will then check via dipstick or use the onboard computer to measure. 

Edited February 24, 2024 by Mkl22

[Gnahp]

when doing first DIY oil change

I will check the oil level before oil change to make sure oil at the correct level

then I will measure the oil that I drained out with measuring jug, 5.8L for my wife's car

after that, I will fill in the same quantity, 5.8L

that will give me the same oil level before oil change

for subsequent oil changes, I will just fill in 5.8L

service manual says 6.5L

if I follow the manual, confirm overfill

 

 

[boonhat_91]

On 2/24/2024 at 11:18 PM, Gnahp said:

when doing first DIY oil change

I will check the oil level before oil change to make sure oil at the correct level

then I will measure the oil that I drained out with measuring jug, 5.8L for my wife's car

after that, I will fill in the same quantity, 5.8L

that will give me the same oil level before oil change

for subsequent oil changes, I will just fill in 5.8L

service manual says 6.5L

if I follow the manual, confirm overfill

 

 

That's not assuring haha.. even follow manual can be incorrect

[Gnahp]

On 2/25/2024 at 1:08 AM, boonhat_91 said:

That's not assuring haha.. even follow manual can be incorrect

based on my own experiences with factory manual, those oil fill numbers are only for reference

I always use oil level as the ultimate guide 

also, like I mentioned earlier, never trust the capacity of the engine oil bottle, they are grossly inaccurate

you pour 4 bottles of 1L engine oil into the engine =/= you pour in 4L

this 5L engine oil that I bought only pour out 4.7L, that's 6% lesser

I always pour the oil from the engine oil bottle into a measuring jug first to get the capacity that I want

then I will fill the engine from the measuring jug

 

 

[Mkl22]

On 2/25/2024 at 1:08 AM, boonhat_91 said:

That's not assuring haha.. even follow manual can be incorrect

Manual specifies dry fill. 
I also don’t bother remeasuring again. Extra oily container to keep and manage…. Bleeh. Just pour 3.5L and then dipstick to check. Then top up accordingly. Then roughly know how much next time. 

Edited February 25, 2024 by Mkl22

[Kklee]

On 2/25/2024 at 10:48 AM, Mkl22 said:

Manual specifies dry fill. 
I also don’t bother remeasuring again. Extra oily container to keep and manage…. Bleeh. Just pour 3.5L and then dipstick to check. Then top up accordingly. Then roughly know how much next time. 

IMHO.
Unless the engine don't have dipstick,  really extra container is harder to manage.  
Of course if got garage, doesn't matter. 🤣

[boonhat_91]

Thanks all for the replies. Guess there is no specific accurate method, just need to ensure it is within min-max on the good ole dipstick.

On that topic, my car manual says to warm up engine to normal operating temp -> turn off and wait 5 min then do the dipstick check. Not when cold which is the usual practice. Is the "normal operating temp" around where the coolant temp gauge stabilizes (100°C)? If so, I have observed that the coolant temp remains stable during my entire 40min commute even with sports mode and heavy footed driving. Does that mean that after my journey, I can turn off and wait 5 min and it would be ok to do the dipstick check accordingly?

Edit: I'm aware coolant temp =/= oil temp, but stable coolant temp should mean oil temp is also stable?

Edited February 26, 2024 by boonhat_91
add context

[Volvobrick]

On 2/26/2024 at 5:09 PM, boonhat_91 said:

Thanks all for the replies. Guess there is no specific accurate method, just need to ensure it is within min-max on the good ole dipstick.

On that topic, my car manual says to warm up engine to normal operating temp -> turn off and wait 5 min then do the dipstick check. Not when cold which is the usual practice. Is the "normal operating temp" around where the coolant temp gauge stabilizes (100°C)? If so, I have observed that the coolant temp remains stable during my entire 40min commute even with sports mode and heavy footed driving. Does that mean that after my journey, I can turn off and wait 5 min and it would be ok to do the dipstick check accordingly?

Edit: I'm aware coolant temp =/= oil temp, but stable coolant temp should mean oil temp is also stable?

Should be the case. Engine cooling system is there for a reason, ie keep engine at optimal operating temperature. 

[Gnahp]

you can compare the oil levels when you check it cold vs check it 5 mins after engine switched off

on the cars that I owned, the difference is negligible

 

one thing that will affect the oil level is the levelness of the floor where you park the car when you are checking the engine oil level

last year when I was waiting for my wife at a carpark

I checked the engine oil level and found out it has dropped

many possibilities ran through my mind

I decided to do a simple check even though the car feels levelled to me

right is Front of the car, left is Rear of the car

car has longitudinal engine

oil level sensor is located at the rear of the engine oil sump

imagine my water bottle is the engine oil sump

now the oil level sensor will read lower than the actual level

 

 

 

[mersaylee]

On 2/26/2024 at 6:05 PM, Gnahp said:

you can compare the oil levels when you check it cold vs check it 5 mins after engine switched off

on the cars that I owned, the difference is negligible

 

one thing that will affect the oil level is the levelness of the floor where you park the car when you are checking the engine oil level

last year when I was waiting for my wife at a carpark

I checked the engine oil level and found out it has dropped

many possibilities ran through my mind

I decided to do a simple check even though the car feels levelled to me

right is Front of the car, left is Rear of the car

car has longitudinal engine

oil level sensor is located at the rear of the engine oil sump

imagine my water bottle is the engine oil sump

now the oil level sensor will read lower than the actual level

 

 

 

Got check any vibration ornot? Sekali Enye was walking nearby...😁

[Gnahp]

On 2/26/2024 at 7:00 PM, mersaylee said:

Got check any vibration ornot? Sekali Enye was walking nearby...😁

 

luckily my water bottle still has water inside

I almost wanted to pee in the bottle to check 😁

[mersaylee]

On 2/26/2024 at 7:23 PM, Gnahp said:

 

luckily my water bottle still has water inside

I almost wanted to pee in the bottle to check 😁

To be more accurate must do with first cold pee of the day...less bubbles...😂

[Gnahp]

On 2/26/2024 at 7:29 PM, mersaylee said:

To be more accurate must do with first cold pee of the day...less bubbles...😂

nurses always remind me

"...mid stream..... mid stream..."

they don't know how difficult to do it

pee, pinch, move to the tiny bottle, let go, pinch again, move away from the bottle and let go 😁

[mersaylee]

On 2/26/2024 at 7:37 PM, Gnahp said:

nurses always remind me

"...mid stream..... mid stream..."

they don't know how difficult to do it

pee, pinch, move to the tiny bottle, let go, pinch again, move away from the bottle and let go 😁

Next time try army style...place target on bathroom floor...spray from one side to the other macam GPMG...with the target in between...reverse the direction if need be...cover it up...rinse bottle, wash hands...😁