Used Oil Analysis: 15k miles on Shell Rotella T6
#16
Feral, I found this on Shell's website:
LOW EMISSIONS Protecting the performance of your exhaust-emissions control systems is not only important for your vehicles to comply with legislative requirements, but also to promote efficient operations. For instance, blocked diesel particulate filters (DPF) can actually increase fuel consumption. Shell Rotella® T6 is formulated with reduced levels of ash, phosphorous and sulfur to help maintain the efficiency of the latest vehicle-emissions technologies. Meeting the ash, phosphorous and sulfur requirements of API CJ-4, Shell Rotella® T6 has been tested and proven to protect your vehicle.
LOW EMISSIONS Protecting the performance of your exhaust-emissions control systems is not only important for your vehicles to comply with legislative requirements, but also to promote efficient operations. For instance, blocked diesel particulate filters (DPF) can actually increase fuel consumption. Shell Rotella® T6 is formulated with reduced levels of ash, phosphorous and sulfur to help maintain the efficiency of the latest vehicle-emissions technologies. Meeting the ash, phosphorous and sulfur requirements of API CJ-4, Shell Rotella® T6 has been tested and proven to protect your vehicle.
#17
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Oh yeah, your iron is sky high too. Double of what it should be. But you know that since you are using the wrong oil viscosity and the wrong drain interval.
#18
From every Aircooled mechanic or Porsche shop I ran into and asked, they say they only use that weight in watercooled cars, 95% were always 20w50 with lots of Zinc, etc. But its your car. Even with synthetic on my daily driver I change at 6-8k for piece of mind as its driven hard.
#19
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I make decisions based on data when the data is available (like my friend Torre likes to say, "Why wonder when you can know?") and the data says the engine and oil are working well together.
You guys are free to make decisions based on whatever you like.
You guys are free to make decisions based on whatever you like.
#20
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And the data says you're leaking/burning oil like the Valdez and your wear metals are through the roof. U r in the Nile, and not the river, just up one soon.
#21
Instructor
I asked him about his sampling technique earlier, and he said he was using a dip tube in the oil tank. I think that's probably got quite a lot to do with the 'sky high' wear metals, rather than anything else. I'd want ownership of the sample from beginning to end to properly analyse it, but there's nothing there that worries me. And a 964 leaking? That's hardly unusual. Give the guy a break.
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That's very funny. My consumption is roughly 1 qt/3750 mi, it's a pre-gasket car, and the engine has never been out; I'm thrilled with that level, it's outstanding. Given the amount it actually drips, it can't hardly be burning anything.
You sound a little shrill. I mentioned you're free to do as you like, right?
#23
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That analysis looks great...lead/Iron numbers? Irrelevant at those levels...remember this is reported in Parts Per Million...I'd worry at 100-150 PPM...especially with 15 K on the oil...Looks great, keep doing what you are doing...Many people chnage oil and waste it just because it makes them feel better.
#24
Three Wheelin'
#26
I just changed my oil on Saturday with Rotella T6 from Wal Mart. I'm coming from Valvoline VR 20W50. I like to drive year round and noticed last winter how thick the Valvoline was in the cold when I topped it off (it was exactly like honey). In the cold, the engine really chugged on startup so I'm hoping the Rotella will minimize startup wear.
#27
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Hi,
bgiere - you are correct
Doug
bgiere - you are correct
That analysis looks great...lead/Iron numbers? Irrelevant at those levels...remember this is reported in Parts Per Million...I'd worry at 100-150 PPM...especially with 15 K on the oil...Looks great, keep doing what you are doing...Many people chnage oil and waste it just because it makes them feel better.
#28
Back in 2002 Porsche revised the recommended oil viscosity and oil change intervals back to 1973. 5w40 is fine.
The very slightly elevated copper/lead is from the long oil cooler lines and the oil cooler(s).
The very slightly elevated copper/lead is from the long oil cooler lines and the oil cooler(s).
Last edited by Rusty Spokes; 10-08-2013 at 12:06 PM.
#29
Drifting
I just changed my oil on Saturday with Rotella T6 from Wal Mart. I'm coming from Valvoline VR 20W50. I like to drive year round and noticed last winter how thick the Valvoline was in the cold when I topped it off (it was exactly like honey). In the cold, the engine really chugged on startup so I'm hoping the Rotella will minimize startup wear.
An oil change is exactly 2 jugs. Have never tried T6, but I like the M1 15W50 over the Valvoline. 1/3 less consumption, and pours better in the cold. YMMV.
#30
Elsewhere, Flat 6 Innovations just scolded me how RTS is a "poor choice for high speed engines"....which is hilarious. My point was the opposite, that it's very good to prevent corrosion of IMS bearing races after the seal pops off.
I guess they would rather wait until it grenades so they can sell a rebuild or try to discredit any concepts that could relieve troubled engines that have IMS exposed to the air.
I'm sure I won't get any technical reply from them, just to know here that RTS works great.
I guess they would rather wait until it grenades so they can sell a rebuild or try to discredit any concepts that could relieve troubled engines that have IMS exposed to the air.
I'm sure I won't get any technical reply from them, just to know here that RTS works great.