GM4718M oil list
08-01-2010, 04:22 PM
#41
Le Mans Master
And no one even knows what GM4178M means..
Last edited by AirBusPilot; 08-01-2010 at 06:18 PM.
08-01-2010, 05:27 PM
#42
Team Owner
But if your driving style only warrants that you must change the oil once a year minimal, isn't spending the extra money on this a waste of $$$ and time? I wouldn't leave any extended oil in for a long time anyway. The only thing (if it's possible) that the oil offers better protection than Mobil One so your engine will last longer using Amsoil vs. Mobil One.
08-01-2010, 05:31 PM
#44
Team Owner
As someone mentioned, any oil company can claim that their oil meets GM4718M. Only the ones actually mentioned on the GM list, have been officially accepted by GM. That's why GM publishes their list.
In theory, GM might deny warranty coverage if they believed that an engine problem was caused by substandard oil even if the oil maker claims the stuff meets GM4718M.
But in practice, I've never heard of that happening and probably never will.
It seems that in the real world, Corvette engines only last 200,000-300,000 miles on Mobil1. Maybe i should try something different.
In theory, GM might deny warranty coverage if they believed that an engine problem was caused by substandard oil even if the oil maker claims the stuff meets GM4718M.
But in practice, I've never heard of that happening and probably never will.
It seems that in the real world, Corvette engines only last 200,000-300,000 miles on Mobil1. Maybe i should try something different.
08-01-2010, 06:47 PM
#45
_"SCOTT"_
As someone mentioned, any oil company can claim that their oil meets GM4718M. Only the ones actually mentioned on the GM list, have been officially accepted by GM. That's why GM publishes their list.
In theory, GM might deny warranty coverage if they believed that an engine problem was caused by substandard oil even if the oil maker claims the stuff meets GM4718M.
But in practice, I've never heard of that happening and probably never will.
It seems that in the real world, Corvette engines only last 200,000-300,000 miles on Mobil1. Maybe i should try something different.
In theory, GM might deny warranty coverage if they believed that an engine problem was caused by substandard oil even if the oil maker claims the stuff meets GM4718M.
But in practice, I've never heard of that happening and probably never will.
It seems that in the real world, Corvette engines only last 200,000-300,000 miles on Mobil1. Maybe i should try something different.
That's what it takes to get on GM's list and some just are not willing to do it when their product speaks for itself.
Amsoil has been around for a long, long, long time...
08-01-2010, 11:29 PM
#46
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St. Jude Donor '15
"In honor of jpee"
08-02-2010, 07:34 AM
#47
Melting Slicks
BTW That list hasnt been updated in over a year, its clearly not on GMs high priority list of things to do.
08-02-2010, 06:03 PM
#48
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St. Jude Donor '13
If the list hasn't been updated for over a year, maybe that's because nobody has submitted any new oils for testing in the last year.
08-02-2010, 06:09 PM
#49
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St. Jude Donor '15
"In honor of jpee"
and my reading of the list more than once since a year ago (because someone on here invariably directs us to it via a url) is that there are at least the ones I stated earlier which are "new to the list." but the date stays the same....oh well. so be it.
08-03-2010, 04:44 PM
#50
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St. Jude Donor '13
Very interesting, thanks!
08-28-2010, 12:56 PM
#51
08-28-2010, 01:10 PM
#52
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St. Jude Donor '15
"In honor of jpee"
08-28-2010, 05:10 PM
#53
Le Mans Master
A pilot friend of mine,who used to use Amsoil in his cars and plane, told me that Amsoil has been reformulated and that it is no longer of use in his plane. He won't use it now in his cars either. I used to use Amsoil 0-30W years ago and thought it was great....
08-28-2010, 10:17 PM
#54
Drifting
I do, Bottom line is its a SMOG Test. Oils that meet the criteria have essentially had there ZDDP zinc/phosphorus levels reduced to a level that will not foul Catalytic converters for 100000 miles, (about 800 ppm or less of ZDDP) or right about when GM will stop warrenting them !!! for those that dont know, ZDDP is a lubricant additive package thats been in oils for the last 100 years or so to protect cam shafts and lifters from destroying themselvs, ( Good anti-friction protection oils will have ZDDP levels around 1100-1400 PPM or higher). Good thing roller camed engines dont need those higher ZDDP protection levels !!!!
The GM4178M test has little to do with how well an oil protects an engine, but how well it protects the CATS !!!!!
The GM4178M test has little to do with how well an oil protects an engine, but how well it protects the CATS !!!!!
08-29-2010, 12:56 PM
#55
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CI 1-4-5-8-9-10 Vet
St. Jude Donor '03,'04,'05,'07,08,'09,'10,’17
I'm doing an oil change this weekend, right after I get my lazy butt off the forum for a while.
Using 1 quart of Mobil 1 racing 0W-30 and 4.5 quarts of 0W-30 regular Mobil 1. The phosphorus level of 1750 ppm (anti-wear) mixing with the regular 800 ppm gives me an average of 972 ppm. Far closer to the 1000-1200 levels that existed prior to the "OMG it'll destroy our planet" cries known to the state of Kalifornia.
And now before all the screaming from the anti-mod crowd begins, It's still my car and I'll do what I want.
Using 1 quart of Mobil 1 racing 0W-30 and 4.5 quarts of 0W-30 regular Mobil 1. The phosphorus level of 1750 ppm (anti-wear) mixing with the regular 800 ppm gives me an average of 972 ppm. Far closer to the 1000-1200 levels that existed prior to the "OMG it'll destroy our planet" cries known to the state of Kalifornia.
And now before all the screaming from the anti-mod crowd begins, It's still my car and I'll do what I want.
08-29-2010, 01:01 PM
#56
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CI 1-4-5-8-9-10 Vet
St. Jude Donor '03,'04,'05,'07,08,'09,'10,’17
Here's the link to cam shield. You might find this easier (or at least make it a little easier to tweak the concentration).
http://cam-shield.com/
I will say that since our cars have roller cams, I'm not concerned w/ ZDDP levels.
http://cam-shield.com/
I will say that since our cars have roller cams, I'm not concerned w/ ZDDP levels.
08-29-2010, 01:29 PM
#57
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CI 1-4-5-8-9-10 Vet
St. Jude Donor '03,'04,'05,'07,08,'09,'10,’17
Using over priced motor oils is a bit like using elephant repellant.
I spend $500 a year to spray my yard with elephant repellant. I know it works because I don't have any elephants in my yard.
I spend $500 a year to spray my yard with elephant repellant. I know it works because I don't have any elephants in my yard.
08-29-2010, 01:35 PM
#58
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CI 1-4-5-8-9-10 Vet
St. Jude Donor '03,'04,'05,'07,08,'09,'10,’17
I do, Bottom line is its a SMOG Test. Oils that meet the criteria have essentially had there ZDDP zinc/phosphorus levels reduced to a level that will not foul Catalytic converters for 100000 miles, (about 800 ppm or less of ZDDP) or right about when GM will stop warrenting them !!! for those that dont know, ZDDP is a lubricant additive package thats been in oils for the last 100 years or so to protect cam shafts and lifters from destroying themselvs, ( Good anti-friction protection oils will have ZDDP levels around 1100-1400 PPM or higher). Good thing roller camed engines dont need those higher ZDDP protection levels !!!!
The GM4178M test has little to do with how well an oil protects an engine, but how well it protects the CATS !!!!!
The GM4178M test has little to do with how well an oil protects an engine, but how well it protects the CATS !!!!!
The Guvment is here to help !!
I remember someone (I think it may have been airbus pilot) was into a heated agruement here with someone about what ellse - of course - it was about motor oils.
He tried to get the guy to admit that he did not know what GM4718 actually specified. The guy never would.
Now it makes sense !!
BTW - I use Mobil One in my C6 cuz that's what the manual says to use and it's middle of the road in pricing.
08-29-2010, 01:38 PM
#59
Le Mans Master
I do, Bottom line is its a SMOG Test. Oils that meet the criteria have essentially had there ZDDP zinc/phosphorus levels reduced to a level that will not foul Catalytic converters for 100000 miles, (about 800 ppm or less of ZDDP) or right about when GM will stop warrenting them !!! for those that dont know, ZDDP is a lubricant additive package thats been in oils for the last 100 years or so to protect cam shafts and lifters from destroying themselvs, ( Good anti-friction protection oils will have ZDDP levels around 1100-1400 PPM or higher). Good thing roller camed engines dont need those higher ZDDP protection levels !!!!
The GM4178M test has little to do with how well an oil protects an engine, but how well it protects the CATS !!!!!
The GM4178M test has little to do with how well an oil protects an engine, but how well it protects the CATS !!!!!
08-29-2010, 01:53 PM
#60
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Pennzoil Ultra Full Synthetic 5W-30 meets /exceeds GM4718M spec and is a GF-5 lubricant. Most of the lubricants recommend by GM, including Mobile 1 SAE 5W-30 are ISLAC GF-4 lubricants. The GM4718M spec was written several years ago, and will be changing soon.
Pennzoil Ultra Full Synthetic 5W-30 also exceeds the forthcoming GM Dexos spec. Dexos spec oils will be required in GM production engines beginning November 2010.
Oil specs are a moving target. What was good 10 years ago, may not meet specs today. What meets the specs today may not meet the specs in 10 years.
I have been using Mobile 1 since 1992, but I am changing from Mobile 1, to Pennzoil Ultra Full Synthetic SAE 5W-30, ILSAC GF-5, at my next oil change.
ILSAC GF-4 vs. GF-5
Pennzoil Ultra Full Synthetic 5W-30 also exceeds the forthcoming GM Dexos spec. Dexos spec oils will be required in GM production engines beginning November 2010.
Oil specs are a moving target. What was good 10 years ago, may not meet specs today. What meets the specs today may not meet the specs in 10 years.
I have been using Mobile 1 since 1992, but I am changing from Mobile 1, to Pennzoil Ultra Full Synthetic SAE 5W-30, ILSAC GF-5, at my next oil change.
ILSAC GF-4 vs. GF-5
Last edited by calemasters; 08-29-2010 at 04:34 PM.