Stingray Corvette Forum banner

1 - 15 of 15 Posts

·
Registered
Joined
·
1,329 Posts
Discussion Starter #1 (Edited)
Mobil 1 5w-30 and Mobil 1 5w-30 2Dexos? Are they 2 different oils?

I went to wally world and purchased 2-5 quart jugs of Mobil 1 5w-30 synthetic motor oil for my oil change. after the Oil change I noticed my previous Mobil 1 5w-30 had a Dexos2 trademark logo on it but the one I just purchased and put in my car does not have that label. I did look for that when I was buying it but they just did not have Mobil 1 5w-30 with that logo.

Did I just put the wrong oil in my car and should I change it with Mobil 1 5w-30 with the 2Dexos label on it?
The left pic is what I used before, the right is what was only available at wallyworld, they both have nascar label on it and this the reason I bought it thinking this is it. wording is all same except 2Dexos not present
2019-05-05 18.32.08mobil 1.jpg
 

·
Registered
Joined
·
10,324 Posts
The high mileage one is not dexos certified. It is supposedly formulated for engines with over 75,000 miles. It probably won't hurt anything, but I would not have used it.
 

·
Registered
Joined
·
54 Posts
Can’t imagine there being any difference.
They’re both synthetic with identical viscosity/weight.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
101 Posts
The Dexos symbol just means that the oil meets the GM specified performance standards in addition to all the American Petroleum Institute standards.
 

·
Registered
Joined
·
1,329 Posts
Discussion Starter #5
Just some readings on this https://www.edmunds.com/car-maintenance/do-i-have-to-use-the-manufacturers-oil.html
Flack from the oil wars: Tom Read, a spokesperson for GM's powertrain technology group, warns that using an alternative oil might diminish performance.

"If a customer uses a non-licensed engine oil that is simply ILSAC GF-5 quality, they will not enjoy the benefits of using a Dexos-licensed product," Read says. Those benefits could include better low-temperature performance, cleaner pistons and better aeration performance, he says. "This could be especially important as the engine oil ages."

Read's case for Dexos sounds compelling, but Valvoline's Smith isn't buying it.

"Our SynPower 5W-20, 5W-30 and DuraBlend 5W-30 went through all the Dexos testing and passed all the requirements," Smith says. "But we felt that carrying the Dexos name was not providing the consumer with any value."

Rather than raise the price of its oil to offset the cost of licensing the Dexos name, Valvoline chose to forgo the license and keep the prices lower, he says.

Smith says that GM's engine-performance warnings are part of its goal to drive consumers to dealerships for their maintenance. "We feel that they are taking choice away from the consumer," he says.

Focus on the Oil Basics
Setting aside the claims and counter-claims of manufacturer-specified oil superiority, here's all you have to remember: As long as you follow the oil specifications shown in your owner's manual, you have nothing to worry about.

In the event that the dealership tries to void your warranty over the use of non-manufacturer oil, know that the Magnuson-Moss Warranty Act will protect you. If your vehicle doesn't have an oil specification, you have more flexibility in choosing your product. Finally, make sure you know the proper viscosity for your car and change the oil at the proper interval.

Share:
Ronald Montoyaby
As a senior consumer advice editor, Ron helps shoppers navigate car buying. He has plenty of firsthand knowledge since he buys and sells the cars in the Edmunds long-term test fleet. Twitter


View More Maintenance Articles

MORE IN MAINTENANCE
Should I Fix Up or Trade Up My Old Car?
100,000-Mile Maintenance Costs for Top-Selling Cars
5 Tips for Choosing the Right Auto Body Shop
How Old -- and Dangerous -- Are Your Tires?
How To Make Sense of Your Car's VIN
 
  • Like
Reactions: noxqq

·
Registered
Joined
·
2,933 Posts
The oils are different with respect to additives. The high mileage oil contains an additive to swell rubber seals, to reduce potential oil leaks in older, high mileage engines.

I think ExxonMobil makes or has made at least three different 5w-30 versions of Mobil 1, A gasoline version, a high mileage gasoline version, and a diesel version.

And on principle, I oppose the Dexos program. To me, its just a way for GM to collect licensing fees from motor oil marketers.
 

·
Registered
Joined
·
401 Posts
Lots of oil hype here. One change of non dexos2 wont end your life or hurt the car, its still better than Dino oil. Lots of arm chair engineers here, I went though all this with my bmw gs, as I switched Rotella T6 5w-30. Rather than $10 per qt dealer castrol synthetic. The Rotella bottle didn't display a spec, then next moth it was on the bottle.
 

·
Registered
Joined
·
267 Posts
I went to wally world and purchased 2-5 quart jugs of Mobil 1 5w-30 synthetic motor oil for my oil change. after the Oil change I noticed my previous Mobil 1 5w-30 had a Dexos2 trademark logo on it but the one I just purchased and put in my car does not have that label. I did look for that when I was buying it but they just did not have Mobil 1 5w-30 with that logo.

Did I just put the wrong oil in my car and should I change it with Mobil 1 5w-30 with the 2Dexos label on it?
The left pic is what I used before, the right is what was only available at wallyworld, they both have nascar label on it and this the reason I bought it thinking this is it. wording is all same except 2Dexos not present
View attachment 269930
The swirl in front of Dexos is not a "2". That is dexos1 which is recommended for gasoline engines. Look closely and you will see a "1" in the box with the swirl. If the oil was for diesel engines, the small number to the right of the swirl would be "2". The recommended oil for Corvette engines is dexos1, except the new 0W-40 dexos2 which is an entirely different oil specification.

And now dexos has evolved even further with a GEN2 label for the most recent formula. When buying now, look for dexos1 GEN2 on the shelf because there could be older containers without the GEN2 designation.
 

·
Registered
Joined
·
401 Posts
Same oil different bottle. Does anyone actually think they stop making Mobil 1 and change the formula to Dexos Mobil 1? If you do, Im worried
 

·
Registered
Joined
·
1,329 Posts
Discussion Starter #10
Same oil different bottle. Does anyone actually think they stop making Mobil 1 and change the formula to Dexos Mobil 1? If you do, Im worried
That would be fraudulent if they did that, major lawsuits would follow.
 

·
Registered
Joined
·
5,053 Posts
Same oil different bottle. Does anyone actually think they stop making Mobil 1 and change the formula to Dexos Mobil 1? If you do, Im worried
Mobile 1 high mileage:

Higher base oil viscosity to help reduce leaks and provide better high-temperature protection†

A boosted level of seal conditioner to protect engine seals because, over time, rubber seals can harden or shrink, resulting in oil leaks
 

·
Registered
Joined
·
553 Posts
A big concern for GM, and much of the impetus behind the dexos1 standards upgrade, is “low-speed pre-ignition” or LSPI. This refers to an abnormal combustion event in which the fuel-air mixture ignites before intended, causing excessive pressures inside the engine’s cylinders. The higher power density of turbocharged, GDI engines makes them vulnerable to LSPI. In mild cases, LSPI causes “super knocking” noises, but in more severe cases it can cause engine damage. Turbocharger failures due to deposits and oil oxidation are another issue. These result in inefficiencies in the engine and can result in a loss of power and acceleration.

https://www.chevronlubricants.com/en_us/home/learning/from-chevron/personal-rec-vechicles-and-equipment/understanding-gm-dexos-1-pcmo-specification.html
 

·
Registered
Joined
·
10,324 Posts
A big concern for GM, and much of the impetus behind the dexos1 standards upgrade, is “low-speed pre-ignition” or LSPI. This refers to an abnormal combustion event in which the fuel-air mixture ignites before intended, causing excessive pressures inside the engine’s cylinders. The higher power density of turbocharged, GDI engines makes them vulnerable to LSPI. In mild cases, LSPI causes “super knocking” noises, but in more severe cases it can cause engine damage. Turbocharger failures due to deposits and oil oxidation are another issue. These result in inefficiencies in the engine and can result in a loss of power and acceleration.

https://www.chevronlubricants.com/en_us/home/learning/from-chevron/personal-rec-vechicles-and-equipment/understanding-gm-dexos-1-pcmo-specification.html
Yes, that is for Dexos1 Gen2. However, no stock C7 has a small displacement turbocharged engine, so LSPI isn't an added concern for us. Dexos1 Gen1 is sufficient for our cars (and all that was available when our cars' engines were first built).
 
1 - 15 of 15 Posts
Top