Not so fast... if you compare iron wear per 1,000 miles, it's almost the same--about 1.3 vs 1.4 ppm per thousand miles.
Hardly a "massive reduction in iron"...
Still, nice UOA!
Pennzoil 5w20, 3050 miles, Chrysler 3.5 HO
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Hardly a "massive reduction in iron"...
Still, nice UOA!
I agree. Also since the Ford modulars are using different materials, what are we not seeing? They seem to just show no wear any way you slice it.
Guess we'll never really know what's up with the iron on M1 sometimes, but this could just be a dropping of copper and iron at this point in engine life. It may be a general down-trend anyway.
How many engines have you seen where the bearings are worn out before the cylinder walls, rings, valves or camshafts? For me the answer is ZERO. Admittedly my universe of engines worked on does not include abused motors or race motors.
I would take ultra low iron wear metals along with minimal bearing wear metals as a tradeoff any day.
John
Patman
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With GC did you compute that iron wear with or without the 9ppm of virgin iron already in it though?
I was not originally aware of the high amount of virgin iron in the GC sample. That seems like an awful lot of contamination in "new" oil. It certainly does not send me out scouting for German Castrol!
The higher iron in the Mobil-1 interval is still rather curious. It seems that relatively high iron numbers show up relatively often in Mobil-1 UOA results.
John
G-Man II, what was in the engine for the 2400 miles between Oct '03 and Feb '04, i.e. between the GC and this last run? And what are the details on what was in there prior to the Mobil1 10w30 listed?
I can't believe MNgopher and Whimsey haven't weighed in on this thread.
They must be on vacation....'cause I know they'd find it interesting.
They must be on vacation....'cause I know they'd find it interesting.
Our data shows "GC" 0w-30 testing from 0 to 4 ppm iron. The Gman clean test of 9 ppm is much higher than normal. Bklabs universal averages on this oilclean = 4 ppm.
Elemental wear rates are not linear in the automotive engine unless it sits on a test stand and in a controlled environment.
427 I think NEO has a oil for you, smarty.....
Elemental wear rates are not linear in the automotive engine unless it sits on a test stand and in a controlled environment.
427 I think NEO has a oil for you, smarty.....
Wow, a comment addressed to me...I'm honored.quote:
Originally posted by Terry:
427 I think NEO has a oil for you, smarty.....
Terry, on a more serious note, how do you give your analysis, is it only by phone? I have one coming your way shortly.
In Feb the dealer gave me a "complimentary" oil change when I took my car in to have the AC evaporator replaced. At that point GC was in there. I don't know what type of bulk oil they put in. When I changed to the Pennzoil 5w20, I first drained the oil and then put in 4 qts of 5w20 and drove for about 5 miles, drained that, changed the filter and added fresh 5w20. I did this to flush all the old oil out so as to have as much pure 5w20 in the engine for this test.
I purchased the car with right at 30,000 miles on it, so don't know what had been used before. I can attest that based on the lease service records, it was serviced every 3000 to 5000 miles at the selling dealer in upstate NY. With the exception of one run of Shell Rotella T Synthetic, I used nothing but Mobil 1 in it prior to switching to GC last year.
Maybe: Pennzoil base is strictly g2, Motorcraft is g2/g3....and of course the mystical unseen ingredient that substitutes for moly
Everyone have a safe Fourth.
Pennzoil is GII+
Thanks for the post, G-Man. I think you and TooSlick are the only two on the board that have tried 20-weights outside the manufacturer's recommendations. TooSlick's results in his Toyota Tacoma truck were not so happy (and I still don't understand why).
Yeah...I second that, thanks for posting this info G-Man II. It's fun to see the outcome of an experiment like this no matter which side of the fence you're on. The Penz 5w20 syn should be an interesting bit of data, too.
[ July 02, 2004, 11:45 PM: Message edited by: 427Z06 ]
[ July 02, 2004, 11:45 PM: Message edited by: 427Z06 ]
Before I make the leap that the rest of you seem to be, I'd want to see another run of a 30 wt oil in this engine. Most of you seem to be assuming that this set of UOAs demonstrates that 5w-20 is better for this engine. TRE pointed out the increased lead and tin, AND no one seems to be accounting for the fact that the iron and copper should be decreasing as a result of the completion of breakin, irrespective of the oil used (within reason, of course). I'm NOT saying that 5w-20 isn't good stuff, I just don't think that this pattern proves the point at all.
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