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Fuels & Lubricants Discussion all about Fuels & Lubricants. synthetic oil, conventional oil, brands, change intervals, diesel grades, gelling and such debated items like that. Non TDI related postings will be moved or removed. This forum is NOT for the discussion of biodiesel and other alternative fuels.

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Old April 11th, 2017, 15:28   #1
2015vwgolfdiesel
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Arrow Prophylactic check on my “DARK” engine oil

Prophylactic check on my “DARK” engine oil

A while back I had the first “free” service of my unit at local VW dealership

Came home and looked at the oil level, and noticed the color was dark-ish, but full.

I was out today, and dropped in on Jiffy Lube.

Sun was bright, and I ask the attendant to dip my oil.

It was 100% full, and was the same dark-ish color.

He told me his (15 year) *experience* with diesel oil was this.

The oil goes in clear-ish then darkens rather quickly.

OK, TDi people ~~ what is the straight skinny?
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Old April 11th, 2017, 15:42   #2
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Oil turns black with soot almost immediately after a change. Totally normal. In fact, diesel oils are designed to hold soot in suspension and they add to the oil's viscosity. This is one reason why it's not a good idea to change oil more frequently than the manufacturer's recommended interval.

Some engines turn oil black faster than others. But they all do, eventually.
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Old April 11th, 2017, 16:02   #3
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Quote:
Originally Posted by IndigoBlueWagon View Post
Oil turns black with soot almost immediately after a change. Totally normal.
I'm with IBW here.
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Old April 11th, 2017, 18:31   #4
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Mine turns black as soon as I upend the jug.
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Old April 11th, 2017, 19:45   #5
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The oil gets dark faster than in gasoline engines, here is an example of M1 ESP 5w30 after 250 miles (from a EA288 tdi):
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Old April 11th, 2017, 19:53   #6
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I use this rather than worry about oil turning black:



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Old April 11th, 2017, 20:03   #7
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^ Damn, I haven't seen that stuff in a long time. We used to have a few cans of that and a bunch of cans of Agway 30 wt. out in the barn when I was a kid.
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Old April 11th, 2017, 20:06   #8
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The closest I get to Jiffy Lube is stopping at the light next to one. Not sure why you even stopped there.
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Old April 11th, 2017, 20:15   #9
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I use this rather than worry about oil turning black:

Wait..oil came in a paper can?
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Old April 11th, 2017, 20:44   #10
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Quote:
Originally Posted by Tdijarhead View Post
Wait..oil came in a paper can?
And before that, it came in glass jugs!


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Old April 11th, 2017, 21:22   #11
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If you had an oil burner (not a diesel) back in the day, a lot of service stations sold cheap, used motor oil in glass bottles. If you were lucky they'd filter it through some cheesecloth.
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Old April 11th, 2017, 22:29   #12
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Quote:
Originally Posted by Tdijarhead View Post
Wait..oil came in a paper can?
Those cardboard cans had some kind of an internal coating for a liner so oil did not leak out IF the can was not damaged too bad. I saw a lot of dented cans back in the day where the outside of the can was 'wet' where the dent was. Most leaky cans I saw was when a can was dropped and the leak was along the top or bottom seam where the metal ends were crimped to the paper tube.

I had a couple of those spouts that one pushed into the metal lid. They were always a bit messy to use. A can opener and a funnel worked better. I do not miss the old paper cans.

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Old April 12th, 2017, 02:28   #13
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Quote:
Originally Posted by whitedog View Post
The closest I get to Jiffy Lube is stopping at the light next to one. Not sure why you even stopped there.
Stopped there to get his opinion on the "color" of my oil. This TDi is my first diesel, and I didn't want-need an opinion of the local WAG folks.

My life time limited knowledge of oil "color" boils down to: Clear is OK. Dark is bad.

When our front line driver was a 2001 Camry, (and all the earlier units) we used Jiffy Lube. This particular location is the first red light out of my neighborhood.

Currently, we both are driving new-ish cars with free dealership oil, filter and tire rotation etc.

Not too sure what the boss will do with her RAV4 LIMITED, as time goes by, regarding the maintenance. Up to her ~~ for sure ~~

My TDi, may get one more free(?) service, before it is sold back to WAG. Really does no matter much to me, one way or another. All I want to do, is check the level, from time to time. IF, I was down even half a quart, I would scamper back to my local WAG for a pint of correct WAG oil.

When I was a youngen' I did my oil-filter, & "lube" in my home garage. Later I used Jiffy Lube.

When I get my (new) replacement, I will take advantage of the free 2-3 year service "stuff." It will be a gasser. After that, I have no plan.

If the cost of dealership (normal) service maintenance gets too high, I may-might fall back to Jiffy Lube.

Today, planning to go see Mom in Stillwater, if she is home. Might take a shot at a personal best MPG. Going to be warm-ish today. Here comes Air Conditioning driving. Guessing the cost of temperature comfort will be 'bout 1-3 MPG ~~ Oh well.
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Old April 12th, 2017, 02:42   #14
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Quote:
Originally Posted by turbobrick240 View Post
If you had an oil burner (not a diesel) back in the day, a lot of service stations sold cheap, used motor oil in glass bottles. If you were lucky they'd filter it through some cheesecloth.
Remember those days well.

When Havoline was $.50 a quart, some owners of shot engines would ask for "used" oil. ~~ Was the cost of the dirty-used oil about $.10 ?

Results would be (approx) 10 or 20 cents for oil and (approx) 12-14 gallons of FireChief at 29.9 cents per gallon

Customers might pay with 4 "singles" and get some silver nickle and copper in change. Remember those days well
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Old April 12th, 2017, 03:34   #15
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When I saw aja8888's pic I was reminded of my stupidity years ago when I used ARCO graphite in the engine of my first car. I thought I was being so smart, black crap almost ruined my engine. I didn't think anybody still remembered that stuf

Actually I remember those "paper" can days well. When I was a kid that's what the oil my Dad would buy always came in. I guess I was just trying to get a rise out of anyone old enough to remember those old oil,cans.

I have to say though I don't remember those glass bottle, used oil days, I think that's a little before my time.

Last edited by Tdijarhead; April 12th, 2017 at 03:46.
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