Pennzoil 10W30, 3926 miles, Infiniti G35... Surprising Results!
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I think this continues to show that it's not all about 'base oil' types, but that the addative package matters even more.
I believe M-1 toutes the "PAO-only" thing at the expense of a good addative package accounts for the better numbers seen with other oils.
I believe M-1 toutes the "PAO-only" thing at the expense of a good addative package accounts for the better numbers seen with other oils.
Didn't I read on another post that Nissan recommends against using synthetics?
Pennzoil used to use Pennsylvania crude, which was a heavy crude and had more wax in it. I don't think they still use the same base stock, but all dino oils have some, unless group II+ or group III AFAIK.
Chevron's dino oils use their "ISO-DEWAXING" formula and it would be my choice for engine cleanliness. Also very good UOAs on this board.
I also wonder if the slightly higher viscosity had something to do with it.
Pennzoil used to use Pennsylvania crude, which was a heavy crude and had more wax in it. I don't think they still use the same base stock, but all dino oils have some, unless group II+ or group III AFAIK.
Chevron's dino oils use their "ISO-DEWAXING" formula and it would be my choice for engine cleanliness. Also very good UOAs on this board.
I also wonder if the slightly higher viscosity had something to do with it.
"Didn't I read on another post that Nissan recommends against using synthetics? "
The manual recommends mineral based oils, but doesn't specifically say no to synthetics.
"...a good synthetic like M1 may have more suspended particules compared with the petroleum that may be sticking to things."
How true is this statement? It seems logical to me, but is it possible that with the dino, the wear metals may sticking to the engine internals, rather than be suspended in the oil, thus making the UOA appear better than it truly is? If so, I suspect that when I switch back to M1 after my second fill of Pennzoil, the detergency in the M1 should clean all the wear particles "stuck" to the internals, and show a UOA with very high numbers. So, I'm going to test this theory in a few thousand miles.
Has anyone had results or data backing up the "lower-detergency-showing-lower-wear-numbers" theory?
The manual recommends mineral based oils, but doesn't specifically say no to synthetics.
"...a good synthetic like M1 may have more suspended particules compared with the petroleum that may be sticking to things."
How true is this statement? It seems logical to me, but is it possible that with the dino, the wear metals may sticking to the engine internals, rather than be suspended in the oil, thus making the UOA appear better than it truly is? If so, I suspect that when I switch back to M1 after my second fill of Pennzoil, the detergency in the M1 should clean all the wear particles "stuck" to the internals, and show a UOA with very high numbers. So, I'm going to test this theory in a few thousand miles.
Has anyone had results or data backing up the "lower-detergency-showing-lower-wear-numbers" theory?
Most high quality/low cost dino oils (Pennzoil, Havoline, Castrol GTX, Chevron Supreme)will give good wear rates. The only down side....you gotta be under the car more often.
Most high quality/low cost dino oils (Pennzoil, Havoline, Castrol GTX, Chevron Supreme)will give good wear rates. The only down side....you gotta be under the car more often.
Generally true... but as you can see, my engine didn't seem to like the M1 combined with the longer interval very much. So I'm giving dino a shot, and will probably switch back to M1 after this run.
Generally true... but as you can see, my engine didn't seem to like the M1 combined with the longer interval very much. So I'm giving dino a shot, and will probably switch back to M1 after this run.
You found out the exact same thing I did when I used to use Mobil 1. I wasn't getting the results I thought I should get with spending the extra money for the Mobil 1. I switched to Chevron Supreme and my wear numbers improved. I had done quite a few Mobil 1 analysis's before I decided to switch.
I've decided to quit using synthetics alltogether. The only thing that still has synthetic in it is my front diff and my transfer case. These will go back to conventional lubes when they are changed next.
Wayne
I've decided to quit using synthetics alltogether. The only thing that still has synthetic in it is my front diff and my transfer case. These will go back to conventional lubes when they are changed next.
Wayne
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