What 5W-30 oil brand are you using for the 6.6L gas?

[revrnd]

On 9/24/2025 at 6:08 PM, Chuck FB said:

Since we were talking about engine oil and Dexos approved oil to cover warranty, this may not be the correct area of this forum to get into this but I had a comment from a service advisor at the dealership ( I was not getting any maintenance done ). The conversation was about the 2 complementary GM oil changes that I have not been taking advantage of as I am using a different oil and to be honest I am not thrilled with having maintenance done by people they just dragged off the street and stuffed into the oil service bay anyway. So the service advisor was asking, are you getting your engine oil changes done at another shop and I said no, I am doing them myself. Then he says well there was this customer who was doing his own maintenance and his engine had a failure and GM denied the warranty claim because he didn't have proof from a shop that the oil had been changed. He said call GM Canada themselves and that is what I did and I was told that GM Canada can deny the warranty if there is no proof from a shop record of oil changes. I said I have the receipts from the oil filters bought at the dealership as well as the oil I have purchase elsewhere but no, that is not proof enough. 

 

So my question is, is this different in the United States as she had no idea what the states rules were, only what GM Canada claims in their warranty. Needless to say I am not impressed at all as I had no idea they could easily deny a claim because the work was done privately, I assume that would apply to any other maintenance as well performed on a transmission, diffs, even changing the fuel filter on a diesel truck ... no record, to bad ... 

 

I was not able to get in contact with the service manager or warranty manager at the dealership to have a chat about this but will try to reach someone to see what the dealerships stance is on this.  

Late replying on this 1, but I know in the US there is the Magnusson Moss Warranty Act that forbids OEMs from forcing you to use 'their' proprietary oil. This comes up a lot in the snowmobile forums where Cat, Polaris or BRP would say 'You have to use our oil.'

 

Im sure members from the US can  expand on this.

 

 

 

[Homer1959]

8 hours ago, revrnd said:

Late replying on this 1, but I know in the US there is the Magnusson Moss Warranty Act that forbids OEMs from forcing you to use 'their' proprietary oil. This comes up a lot in the snowmobile forums where Cat, Polaris or BRP would say 'You have to use our oil.'

 

Im sure members from the US can  expand on this.

 

 

 

I'm older and maybe a bit cynical, but I've learned that being right doesn't necessarily make winning a battle any easier. When someone knows you're right but refuses to admit it, they can drag things out for years. Money isn't an issue for them, but for me, it's a different story. I completely understand your point. Here in Quebec, we have small claims court, which is a simple process, but it can take over a year to be heard. Even if you win, you're left to enforce the judgment on your own, which means more money for bailiff assistance. It's the same story at home with the wife.:-))  

[Chuck FB]

9 hours ago, revrnd said:

Late replying on this 1, but I know in the US there is the Magnusson Moss Warranty Act that forbids OEMs from forcing you to use 'their' proprietary oil. This comes up a lot in the snowmobile forums where Cat, Polaris or BRP would say 'You have to use our oil.'

 

Im sure members from the US can  expand on this.

 

 

 

In the case of GM they want proof of the work performed, I did talk to the lady that does the warranty claims at the dealer after my comments on here and she said that I must create paper work showing the trucks vin and and date and km on the truck when the oil was changed and that I have a copy of the receipt for the oil used and the filter for each oil change that is performed attached to that created maintenance paper work. The dealership has to submit that to GM for warranty consideration. That of course means the oil on the receipt would have to conform to the GM spec which in this case is that wonderful Dexos 1 spec and the viscosity. 

 

That was the one side of it but the other side is the attitude of the service advisor who I am sure they get coached to put a scare as it were into customers to cause them doubt about doing anything other than bringing the vehicle to the dealer for service work or fear not having the warrant cover an issue, if they can mind manipulate a customer into bringing their vehicle to the dealer vs "some other shop", its more money coming to the dealership. Everyone will have a different reaction to such a conversation but for me that just puts off alarm bells in my head when crap like that comes at me. Not that I think others should not feel free to bring their vehicle to a dealership to have maintenance performed, I just don't want to be cohered into doing it by a GM employee with ulterior motives. 

[KARNUT]

When I got to the point I didn’t want to do my own maintenance anymore. I became more interested in service after the sale than saving a few dollars on purchase price. I did stray once when I bought a new Camry. Over the years with new vehicles one dealer got most of my business. And service after the sale. Simply reading the manual you can get familiar with what’s really required. To protect against the upsell. Eventually after finding a good Valvoline quick lube I started going every other oil change. Once the warranty was over. Once I started keeping vehicles longer I got to appreciate the longevity of using original equipment replacements parts. The other upside was at least with my GMC-Hyundai dealer I get coupons for service. I have over 20 years experience with my local Honda dealer with a purchase of a 2001 Intagra type r. Their service area is visible from the waiting area through plate glass. I only had one bad experience that changed me From a Ford buyer to GM-Hyundai. Nothing to do with the vehicles. I caught the fudging the check list. Yup, I watch. The second they damaged the wife’s new Mercury Mystique during warranty work. Cost them a sale of a new T-bird. We ended up with the Acura instead. That worked out rather well being the T-bird was a bust. And Hyundai turned out to be better than expected. My grandson is driving the first one we bought. And my wife wouldn’t part with the last. I couldn’t talk my wife into a Chevy SS. And I couldn’t use one for work. It turned out OK though I later got a trailblazer ss. The only other time I strayed from the GM-Hyundai dealer. In conclusion. It like everything else do your do diligence you’ll find a good one. 

Edited October 2, 2025 by KARNUT

[diyer2]

Here it is

https://www.autocare.org/government-relations/current-issues/Magnuson-Moss-Warranty-Act#:~:text=The Magnuson-Moss Warranty Act is a consumer protection law,is covered by the warranty.

 

I keep receipts, log oil changes with oil brand and oil filter manufacturer. Matches receipts.

 

[customboss]

On 10/1/2025 at 9:15 PM, Chuck FB said:

In the case of GM they want proof of the work performed, I did talk to the lady that does the warranty claims at the dealer after my comments on here and she said that I must create paper work showing the trucks vin and and date and km on the truck when the oil was changed and that I have a copy of the receipt for the oil used and the filter for each oil change that is performed attached to that created maintenance paper work. The dealership has to submit that to GM for warranty consideration. That of course means the oil on the receipt would have to conform to the GM spec which in this case is that wonderful Dexos 1 spec and the viscosity. 

 

That was the one side of it but the other side is the attitude of the service advisor who I am sure they get coached to put a scare as it were into customers to cause them doubt about doing anything other than bringing the vehicle to the dealer for service work or fear not having the warrant cover an issue, if they can mind manipulate a customer into bringing their vehicle to the dealer vs "some other shop", its more money coming to the dealership. Everyone will have a different reaction to such a conversation but for me that just puts off alarm bells in my head when crap like that comes at me. Not that I think others should not feel free to bring their vehicle to a dealership to have maintenance performed, I just don't want to be cohered into doing it by a GM employee with ulterior motives. 

Thats BS. They have to prove you didn’t. Fight them. 

[revrnd]

8 minutes ago, customboss said:

Thats BS. They have to prove you didn’t. Fight them. 

Thats easier said than done. They have a legal department, what does the Average Joe have?

[Chuck FB]

32 minutes ago, revrnd said:

Thats easier said than done. They have a legal department, what does the Average Joe have?

That is very true as an individual in Canada, we are basically at the whim of the dealership and the manufacturer. I realize people in the states "assume" we must have a lemon law but from what I have heard there is no such thing as a government agency or law that is on the customers side to settle an issue with lets say a repeated breakdown of the same component and that they are obligated to buy the vehicle back or a time frame of when they must have a warranty issue repaired. When I talked to GM Canada as well as the person in charge of warranty claims at the dealership, its just not like the USA system and so we don't have the same rights or leverage here in Canada, and there is no Magnuson Moss Act either. 

 

What we do have access to though is what they call Vaseline, it has special lubricating qualities and can be purchased at any pharmacy section and I see Costco sells it as a two pack. Its always a good plan to have some of that within reach because one never knows when one might be forced to bend over the counter at a business ( including dealing with grain companies at the grain elevators and farm dealerships etc ) as it does ease the pain ! 

[Chuck FB]

1 hour ago, customboss said:

Thats BS. They have to prove you didn’t. Fight them. 

You will see my other comment .. 

[customboss]

1 hour ago, revrnd said:

Thats easier said than done. They have a legal department, what does the Average Joe have?

Backbone and standing up for yourself. 

[customboss]

15 minutes ago, Chuck FB said:

That is very true as an individual in Canada, we are basically at the whim of the dealership and the manufacturer. I realize people in the states "assume" we must have a lemon law but from what I have heard there is no such thing as a government agency or law that is on the customers side to settle an issue with lets say a repeated breakdown of the same component and that they are obligated to buy the vehicle back or a time frame of when they must have a warranty issue repaired. When I talked to GM Canada as well as the person in charge of warranty claims at the dealership, its just not like the USA system and so we don't have the same rights or leverage here in Canada, and there is no Magnuson Moss Act either. 

 

What we do have access to though is what they call Vaseline, it has special lubricating qualities and can be purchased at any pharmacy section and I see Costco sells it as a two pack. Its always a good plan to have some of that within reach because one never knows when one might be forced to bend over the counter at a business ( including dealing with grain companies at the grain elevators and farm dealerships etc ) as it does ease the pain ! 

You didn’t get away from the crown fast enough. Ugh. 

[customboss]

16 minutes ago, Chuck FB said:

You will see my other comment .. 

sorry Chuck. You are screwed by the royal foundation of Canada law. 

[customboss]

1 hour ago, customboss said:

Thats BS. They have to prove you didn’t. Fight them. 

Sorry that was assuming you were living in Patriot land. 

[Chuck FB]

19 minutes ago, customboss said:

Sorry that was assuming you were living in Patriot land. 

Totally understand, its easy to miss a detail like that and I had to look myself at what is listed on here for my location and its Alberta the province if one even knows where that is in the world, however Canada is not listed as I see. So no, I live in what now has or is fast becoming become Commy Land, as the drive is on to take our guns away as well as the beginnings of land grabs of legitimately bought/owned land ( in BC that is going on so far ). It isn't the country it once was and I expect to a degree you can say the same south of our border that its instead on the rise up rather than the spiral down as they work to undo the mess that had been created prior. 

 

But as to the consumer protection or lack there of in Canada, it is a very good question as to why it is the way it is, obviously its certainly good for the manufacturer if they can duck out from under an obligation that another country has put into law to hold them to account. 

[customboss]

2 hours ago, Chuck FB said:

Totally understand, its easy to miss a detail like that and I had to look myself at what is listed on here for my location and its Alberta the province if one even knows where that is in the world, however Canada is not listed as I see. So no, I live in what now has or is fast becoming become Commy Land, as the drive is on to take our guns away as well as the beginnings of land grabs of legitimately bought/owned land ( in BC that is going on so far ). It isn't the country it once was and I expect to a degree you can say the same south of our border that its instead on the rise up rather than the spiral down as they work to undo the mess that had been created prior. 

 

But as to the consumer protection or lack there of in Canada, it is a very good question as to why it is the way it is, obviously its certainly good for the manufacturer if they can duck out from under an obligation that another country has put into law to hold them to account. 

The CO-OP refinery is located in Vagina, ( joke) Saskatchewan for all of Canada. I believe Alberta can get relatively fresh well formulated diesel with appropriate additives. It’s a very good product and their engine oils are great too. 
 

Edited October 22, 2025 by customboss