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Ask Mobil Archive -
Oil Coloration
DateQuestionAnswer
10/25/2010
Will Switching to Mobil 1 Improve the Pressure in a Older Pickup?
I bought a 1982 GMC S10 with 65,000 actual miles that had been sitting for 9 years. After using Mobil 1, the oil got very dirty very fast. I fear the original owner never changed the oil. (It still ha...
We would certainly recommend giving Mobil 1 another try.  Mobil 1 is specially formulated with advanced cleaning additives to protect engine parts. It is entirely possible that Mobil 1 was doing what ...
10/14/2010
Does Black Motor Oil Indicate Need for Shortened Oil Intervals?
I've been a constant user of Mobil 1 for the last 8+ years. First started using Mobil 1 on my 2002 Nissan Xterra with the supercharged 3.3 liter motor.  Now I currently use it on my 2008 Nissan Fronti...
Since one of the key engine oil tasks is to keep internal components clean and free from varnish and harmful deposits, when the oil is drained, the contaminants are removed with it, so it is normal fo...
07/17/2010
Black Oil After 5,000 Miles
I began using Mobil 1 in my 2002 Acura MDX when I got it in 2009 with 109k on it. Have had it changed at 113k and 119k. I took it to my local shop for the last change at 125k. I changed it myself toda...
Motor oils contain detergent and dispersant additives that suspend contaminants and combustion by-products.  This can be the reason why the oil may look dirty or black, meaning the oil is doing its jo...
10/14/2009
Is New Mobil 1 When Installed Clear or Black?
I paid extra for my mechanic to put Mobil 1 in my car and I suspect he used conventional oil. A normal oil change was $29.99 but I paid $150.00 for Mobil 1 full synthetic oil to be put in my 2008 VW E...
Assuming the plug is in place, it is not uncommon for the old oil that is being changed to drip on the suspension when the oil filter is removed. Later this oil can run off the engine or suspension an...
11/18/2008
Any Problems Leaving in Oil That Has Been Dyed
While recently having an oil leak repaired on my 2008 Cadillac DTS at a Cadillac dealership they added a fluorescent dye to the oil. Any harm in leaving the oil in the engine with the dye in it? Or sh...
Although we do not have any specific data, we don’t think the dyes will cause any problems since they are typically used at very low levels.  We suggest that you contact your GM dealer.
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