I read a bit on oil color and what it can mean and what I found out is that it's not supposed to say much as black oil could just mean that it's cleaning well the engine, so far so good.
Now I did multiple OCs with GF5 oils and I check often the oil level (a bit OCD on that) and I noticed that all GF5 I used turned very very dark (almost pitch black) past 1500 miles of use, they also sheared a lot as my engine is known to be very hard on oils. Now that didn't bother me as I read on the topic and came to the conclusion that it was doing it's job.
However on my last oil change I went with a very different oil, Rotella MV 5w-30 which is CK4/SN Plus (not GF5) and the engine is very happy with this oil so far, very quiet and smooth. Now, I have 3000 miles on this oil and it's just barely getting dark.
Does that mean that it's not cleaning enough compared the other oils? Does an oil gets darker as it shears? That would explain the GF5 color...
Any thoughts?
Now I did multiple OCs with GF5 oils and I check often the oil level (a bit OCD on that) and I noticed that all GF5 I used turned very very dark (almost pitch black) past 1500 miles of use, they also sheared a lot as my engine is known to be very hard on oils. Now that didn't bother me as I read on the topic and came to the conclusion that it was doing it's job.
However on my last oil change I went with a very different oil, Rotella MV 5w-30 which is CK4/SN Plus (not GF5) and the engine is very happy with this oil so far, very quiet and smooth. Now, I have 3000 miles on this oil and it's just barely getting dark.
Does that mean that it's not cleaning enough compared the other oils? Does an oil gets darker as it shears? That would explain the GF5 color...
Any thoughts?
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