Mobil1 5W-30 Now Dexos1 Rated
09-21-2010, 09:18 PM
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St. Jude Donor '13
Mobil1 5W-30 Now Dexos1 Rated
According to the Mobil1 website, regular M1 5W-30 is now Dexos1 rated, so it would comply with the 2011 GM recommendations.
I didn't go through all of the pages, but the regular 5W-30 is the only M1 currently rated Dexos1 that i saw.
The information does not say whether the oil has been re-formulated, or the old stuff was re-tested and found to meet the Dexos spec.
There are other companies making Dexos1 rated oil, but many folks here use M1 either because their dealer uses it, or because it's available almost everywhere.
This thread will soon deteriorate into "my oil is better than your oil" nonsense...
I didn't go through all of the pages, but the regular 5W-30 is the only M1 currently rated Dexos1 that i saw.
The information does not say whether the oil has been re-formulated, or the old stuff was re-tested and found to meet the Dexos spec.
There are other companies making Dexos1 rated oil, but many folks here use M1 either because their dealer uses it, or because it's available almost everywhere.
This thread will soon deteriorate into "my oil is better than your oil" nonsense...
09-22-2010, 05:05 PM
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St. Jude Donor '13
09-22-2010, 05:07 PM
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So the Dexos1 is the new GM standard ?
09-22-2010, 06:01 PM
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St. Jude Donor '13
My understanding is that all 2011 GM gasoline engines say the oil should meet the new Dexos1 standard, but the wording in the manual seems to say that non-Dexos is ok if that's all you can get.
Makes sense, at least on the Corvette; the engines have not changed from last year.
Maybe they re-calibrated the OLI ?
Supposedly, the Dexos spec requires greater anti-wear additives in the oil.
Makes sense, at least on the Corvette; the engines have not changed from last year.
Maybe they re-calibrated the OLI ?
Supposedly, the Dexos spec requires greater anti-wear additives in the oil.
09-22-2010, 06:20 PM
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My understanding is that all 2011 GM gasoline engines say the oil should meet the new Dexos1 standard, but the wording in the manual seems to say that non-Dexos is ok if that's all you can get.
Makes sense, at least on the Corvette; the engines have not changed from last year.
Maybe they re-calibrated the OLI ?
Supposedly, the Dexos spec requires greater anti-wear additives in the oil.
Makes sense, at least on the Corvette; the engines have not changed from last year.
Maybe they re-calibrated the OLI ?
Supposedly, the Dexos spec requires greater anti-wear additives in the oil.
Even though it's a 2010, my wife's CTS 3.6L looks like it is on a path to allow 10k between oil changes. I did change the factory fill last week at 5k to AMSOIL ASL 5W-30. Now I will let it go 10k between changes.
09-22-2010, 06:35 PM
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I have read that the intent is to allow longer oil change intervals with a more robust motor oil. That certainly means recalibrating the OLM for MY2011 assuming DEXOS is in the engine so that the owner knows it is okay to extend the change interval as the OLM will allow or 1 year whichever comes first.
Even though it's a 2010, my wife's CTS 3.6L looks like it is on a path to allow 10k between oil changes. I did change the factory fill last week at 5k to AMSOIL ASL 5W-30. Now I will let it go 10k between changes.
Even though it's a 2010, my wife's CTS 3.6L looks like it is on a path to allow 10k between oil changes. I did change the factory fill last week at 5k to AMSOIL ASL 5W-30. Now I will let it go 10k between changes.
It would be nice to be privvy to the durability testing that is done. There certainly is a balancing act between making the engine last longer and making the oil change intervals shorter to save oil.
Not that this is anything other than academic to the average C6 user like me that puts a few k miles on the car every year.
09-22-2010, 07:39 PM
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That is most certainly the reason for the new factory fill. The thought of 62 million autos in the USA consuming a gallon plus of oil every 3,500 or so miles due to routine maintenance has long pained the environmental movement.
It would be nice to be privvy to the durability testing that is done. There certainly is a balancing act between making the engine last longer and making the oil change intervals shorter to save oil.
Not that this is anything other than academic to the average C6 user like me that puts a few k miles on the car every year.
It would be nice to be privvy to the durability testing that is done. There certainly is a balancing act between making the engine last longer and making the oil change intervals shorter to save oil.
Not that this is anything other than academic to the average C6 user like me that puts a few k miles on the car every year.
09-22-2010, 10:29 PM
#8
Melting Slicks
09-22-2010, 11:55 PM
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My understanding is that all 2011 GM gasoline engines say the oil should meet the new Dexos1 standard, but the wording in the manual seems to say that non-Dexos is ok if that's all you can get.
Makes sense, at least on the Corvette; the engines have not changed from last year.
Maybe they re-calibrated the OLI ?
Supposedly, the Dexos spec requires greater anti-wear additives in the oil.
Makes sense, at least on the Corvette; the engines have not changed from last year.
Maybe they re-calibrated the OLI ?
Supposedly, the Dexos spec requires greater anti-wear additives in the oil.
09-23-2010, 10:55 PM
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St. Jude Donor '13
I'm not sure what you are asking.
My understanding is that the Dexos oils are backwards-compatible, ok in older cars and probably some minor advantages to using them.
I know nothing about Amsoil, good or bad.
My understanding is that the Dexos oils are backwards-compatible, ok in older cars and probably some minor advantages to using them.
I know nothing about Amsoil, good or bad.
09-24-2010, 07:13 AM
#13
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According to the Mobil1 website, regular M1 5W-30 is now Dexos1 rated, so it would comply with the 2011 GM recommendations.
I didn't go through all of the pages, but the regular 5W-30 is the only M1 currently rated Dexos1 that i saw.
The information does not say whether the oil has been re-formulated, or the old stuff was re-tested and found to meet the Dexos spec.
There are other companies making Dexos1 rated oil, but many folks here use M1 either because their dealer uses it, or because it's available almost everywhere.
This thread will soon deteriorate into "my oil is better than your oil" nonsense...
I didn't go through all of the pages, but the regular 5W-30 is the only M1 currently rated Dexos1 that i saw.
The information does not say whether the oil has been re-formulated, or the old stuff was re-tested and found to meet the Dexos spec.
There are other companies making Dexos1 rated oil, but many folks here use M1 either because their dealer uses it, or because it's available almost everywhere.
This thread will soon deteriorate into "my oil is better than your oil" nonsense...
This is going to keep people from buying anything with "synthetic" on the bottle and assuming it is G2G just because it says "Synthetic". Instead, they can just buy an oil meeting dexos spec, and whatever they buy, it may not be the NUMBER 1 choice, but it will be good enough that it won't much matter.
I am happy that GM is doing this.
On the flip-side, GM is making a KILLING off of royalties with this dexos scheme of theirs. Profit is profit, I guess. If I was a lubricant company owner, I would be really ticked right now, though.
From the viewpoint of a car owner who is informed about Group III and group IV oils and has no trouble selecting a good oil. I don't know how I feel about dexos. It isn't about building an oil that will protect the engine better. It is about emissions, "oil robustness" (to prevent fouling of catalytic converters, allow lower viscosity without having the oil shear down too low. Currently mobil 1 sold as a 30 weight I have UOA's for is on the light end of SAE 30 when new, and will shear to a mid 20 weight SAE spec--or about 8.5-8.8cSt at operating temp in some cars in 2-3K miles on it), and lower viscosity to allow for better economy. If GM tightens up their engines for the thinner oil, I don't see a problem. If they try to run thin oil in loose engines. Well, I don't think it will work so hot. If they stick to using the same viscosity oil, and just increase oil "robustness" to prevent emission control equipment failure, then I think it will be nothing but good.
Last edited by BSSN; 09-24-2010 at 07:24 AM.
09-24-2010, 07:14 AM
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I don't have any convenient links at the moment but I am sure Google will find it for you. Pennzoil and QS have both publicly announced 5W-30 oils that are now DEXOS-1 compliant several months ago. If memory serves me, every single GM gasoline engine for MY2011 will be factory filled with DEXOS-1 which is synthetic of course. I sent AMSOIL a question several weeks ago about this and they replied that they will be announcing a DEXOS-1 compliant oil soon. I think they will reformulate their ASL product rather than release an entirely different and additional product. GM will not require you to use DEXOS for MY2010 and earlier cars but DEXOS is backwards compatible so you can use it if you wish. I now use AMSOIL ASL in the four cars I take care of (3 vettes & CTS). If ASL becomes DEXOS compliant, I will continue to use it even though not required for warranty.
Last edited by GOLD72; 09-24-2010 at 07:17 AM.
09-24-2010, 07:22 AM
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St. Jude Donor '13
Dexos is a new standard for motor oil. Unlike many standards, it is strictly a GM thing at least for now.
The info I've seen indicates Dexos oils should produce better wear characteristics in engines, molybdinum disulfide(?) (moly) will probably be an additive in most Dexos oils. Cost will probably increase but GM hopes that will be offset by longer oil change intervals and longer engine life.
Although this has been discussed in the industry for a couple of years, it's just hitting the street this year.
The info I've seen indicates Dexos oils should produce better wear characteristics in engines, molybdinum disulfide(?) (moly) will probably be an additive in most Dexos oils. Cost will probably increase but GM hopes that will be offset by longer oil change intervals and longer engine life.
Although this has been discussed in the industry for a couple of years, it's just hitting the street this year.
09-24-2010, 07:32 AM
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09-24-2010, 11:41 AM
#17
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Dexos is a new standard for motor oil. Unlike many standards, it is strictly a GM thing at least for now.
The info I've seen indicates Dexos oils should produce better wear characteristics in engines, molybdinum disulfide(?) (moly) will probably be an additive in most Dexos oils. Cost will probably increase but GM hopes that will be offset by longer oil change intervals and longer engine life.
Although this has been discussed in the industry for a couple of years, it's just hitting the street this year.
The info I've seen indicates Dexos oils should produce better wear characteristics in engines, molybdinum disulfide(?) (moly) will probably be an additive in most Dexos oils. Cost will probably increase but GM hopes that will be offset by longer oil change intervals and longer engine life.
Although this has been discussed in the industry for a couple of years, it's just hitting the street this year.
