Synthetic Oil Harmful?

Post by **MrAl** » 03 Apr 2018, 05:56

Hello again,

One of the things i noticed on all of my cars in the past is that after a while the oil turns dark. It starts out clear where you almost cant see it on the dip stick, then eventually well under 3k miles it starts to turn dark. I know it cant be 'bad' oil.
Any ideas why it turns dark?

Post by **Rattnalle** » 03 Apr 2018, 06:44

MrAl wrote: ↑03 Apr 2018, 05:56 Hello again,

One of the things i noticed on all of my cars in the past is that after a while the oil turns dark. It starts out clear where you almost cant see it on the dip stick, then eventually well under 3k miles it starts to turn dark. I know it cant be 'bad' oil.
Any ideas why it turns dark?

See June's oil thread in the general section for some thoughts on that. I've never really seen that kind of darkening using synthetic oil myself and June seems to confirm that after switching. My oil mostly just seems to slowly fill up with soot and other contaminants rather than change colour itself. If the colour is relevant for actual properties though is another matter.

Post by **Rattnalle** » 03 Apr 2018, 06:47

abscate wrote: ↑03 Apr 2018, 04:58
the rest of us just need to read the world least read book

If you have normal use patterns this is the easy route. Our oil change places here try to sell everyone that they have extreme use and then push 3000 mile changes which, if the owners fix oil analysis, would find unecessary.

The folks here with very low mileage patterns might want to do oil analysis if it gives them piece of mind.

I’ve changed my low miles VW to a 2 year interval so I’m running out of used oil to sell...

Pretty much nobody is an extreme use case. I mean how many minutes in a year do you actually drive the car full throttle? Not they many even if I actually do try to when I can

I'm guessing cold starts and short driving distance is much more extreme but then you'd still hit the time limit for the oil changes with low milage and be fine.

Post by **bmdubya1198** » 03 Apr 2018, 07:04

abscate wrote: ↑03 Apr 2018, 04:58 I’ve changed my low miles VW to a 2 year interval so I’m running out of used oil to sell...

The brake fluid is still up for grabs, right? I hope so, I can't stand to spend $4 on that Prestone stuff from Walmart.

Post by **regent** » 03 Apr 2018, 10:48

We carry a low-priced all-purpose mixture of all kinds of refurbished automotive fluids: coolant, brake fluid, transmission oil, engine oil, and power steering fluid.

Disclaimer: It can be used on any self-propelled vehicle in any application (except as a windshield washer fluid)

Post by **abscate** » 03 Apr 2018, 19:24

Harsh brownies....

Post by **regent** » 04 Apr 2018, 05:50

Those have not yet been considered for approval by the FDA, not in the CONUS

Post by **MrAl** » 04 Apr 2018, 10:00

Rattnalle wrote: ↑03 Apr 2018, 06:44
MrAl wrote: ↑03 Apr 2018, 05:56 Hello again,

One of the things i noticed on all of my cars in the past is that after a while the oil turns dark. It starts out clear where you almost cant see it on the dip stick, then eventually well under 3k miles it starts to turn dark. I know it cant be 'bad' oil.
Any ideas why it turns dark?
See June's oil thread in the general section for some thoughts on that. I've never really seen that kind of darkening using synthetic oil myself and June seems to confirm that after switching. My oil mostly just seems to slowly fill up with soot and other contaminants rather than change colour itself. If the colour is relevant for actual properties though is another matter.

Hi,

Do you have a link to that? Sounds interesting. I'll try to find it too.

Post by **Rattnalle** » 04 Apr 2018, 10:14

MrAl wrote: ↑04 Apr 2018, 10:00
Rattnalle wrote: ↑03 Apr 2018, 06:44
MrAl wrote: ↑03 Apr 2018, 05:56 Hello again,

One of the things i noticed on all of my cars in the past is that after a while the oil turns dark. It starts out clear where you almost cant see it on the dip stick, then eventually well under 3k miles it starts to turn dark. I know it cant be 'bad' oil.
Any ideas why it turns dark?
See June's oil thread in the general section for some thoughts on that. I've never really seen that kind of darkening using synthetic oil myself and June seems to confirm that after switching. My oil mostly just seems to slowly fill up with soot and other contaminants rather than change colour itself. If the colour is relevant for actual properties though is another matter.
Hi,

Do you have a link to that? Sounds interesting. I'll try to find it too.

Here it is: viewtopic.php?f=4&t=84023

Post by **MrAl** » 04 Apr 2018, 13:15

Rattnalle wrote: ↑04 Apr 2018, 10:14
MrAl wrote: ↑04 Apr 2018, 10:00
Rattnalle wrote: ↑03 Apr 2018, 06:44
See June's oil thread in the general section for some thoughts on that. I've never really seen that kind of darkening using synthetic oil myself and June seems to confirm that after switching. My oil mostly just seems to slowly fill up with soot and other contaminants rather than change colour itself. If the colour is relevant for actual properties though is another matter.
Hi,

Do you have a link to that? Sounds interesting. I'll try to find it too.
Here it is: viewtopic.php?f=4&t=84023

Hi,

Thanks much.

What do they mean by group 3 and group 5 oil?

Synthetic Oil Harmful?

Re: Synthetic Oil Harmful?