Rondog

Was reading previous links on here about the first oil change at 500 miles, ( They are dated back to 2014-15) Took my '16 Z06 to the dealer today since I was at 539 miles. I asked them about using Mobil 1, but the cap where you put the oil in has a large sticker attached that says to use Dexros Approved oil. I think this is what I got instead of Mobil One. Can anyone confirm that this is OK or not?

juanvaldez

Mobil 1 is Dexros but Dexros ain't necessarily Mobil 1. You are supposed to get Mobil 1.

dvilin

Fine either way makes no difference at all.

proexpert

Dexos is an industry standard. Mobil 1 is a brand of Dexos approved oil. Yes the oil you got is okay. Many will argue this point. As a mechanical engineer, my opinion is that it doesn't matter.

Steve_R

It's says Dexos, not Dexros. That's not a type or brand of oil, it's a spec that GM requires. Mobil1 meets the Dexos spec, as do a number of other brands. So, unless you ask the dealer or look at the paperwork, you won't know if they put Mobil1 in or not. As long as the oil meets the Dexos spec you're fine.

owc6

All of the above, but all Corvettes are supposed to get Mobil 1 brand for their "free" oil changes.

Bunk

Wow, Steve_R, you have to be the most patient moderator here. There must be 90 threads on Dexos and Mobil 1. Let's cut Steve a break

dval

Mobil 1 exceeds dexos . Dexos is scam gm came up with

driver9

Sort of.

Dexos is a standard for motor oils. GM claims that any oil meeting this standard is acceptable for the Corvette motors.

Mobil 1 does exceed the Dexos standard in one especially important regard. It is 100% synthetic. Not all oils meeting the Dexos standard are 100% synthetic. Some of them are blends of synthetic and non-synthetic.

It gets more interesting to those of us operating GDI engines (that would be all C7 owners) re the valve-stem fouling issue endemic to all GDI engines (not just Chevrolet engines) which triggers the catch can debate.

Some of what I've read about the GDI fouling issue seems to indicate that many of those researching the issue believe that the solution will be found in oil formulations. The perfect oil that solves the problem has not yet been created, but there is literature that says that fouling is substantially less with 100% synthetic oils than it is with blends. I'll be sticking with 100% synthetic myself. Specifically Mobil 1 for my Corvette. (Some of the stuff I've read also indicates that fouling is much less with engines run hard than it is with engines run gently. So run them hard if you believe stuff you read on the internets -- or if you just like to feel the road rush by under your wheels.)

lastcowboy

just call mobil and ask for a free sticker that sticks on the cap . it says mobil 1 only . they will be happy to send you one .

Millerrock

X2 this!!!!!!!!!!!!!!!!

JoesC5

Actually GM specs dexos, not Dexos.

Also the OP states that his car is a Z06 and this is what is stated on page 227 of the 2016 Corvette owners manual....."GM recommends Mobil 1® engine oils that show the dexos1 approved logo for its dry sump equipped engines."

While not required, it is recommended that Mobil1 that meets dexos1 be used in any Corvette with the RPO Z52. Not every Mobil1 oil meets the dexos spec.

Larry/car

I am planing to trade prior to the car at three years. Doesn't make a any difference to me what brand oil the dealer installed, just that it meets GM requirements.

JerryU

I see many posts in this Thread saying it makes not difference. I don't agree! Especially with a Z06 you want a full synthetic, not a blend that may have what some call "Dino oil" that contains more impurities.

GM came up with their own spec for oil. Like API, they require a fee to put dexos, their brand name (note small 'd') to be put on a container. There are ~100 brand labels that meet the spec, you can look it up. Some with names I never heard of! The dealer is supposed to use Mobile 1 for at least Z51 and Z06 C7s. If they don't it could be because they bought the lowest price " Oh So Peachy" brand that is dexos certified in 55 gallon drums for their oil change bay.

Lots of threads about GM saying Mobil 1 must be used, search and you'll find some documents. I change my own and buy Mobil 1 at a good price in 5 gallon jugs and get a rebate from Mobil. I would use it or perhaps another full synthetic, not some unknown blend.


Your Car, Do as You Wish.

JerryU

IMO, if a dealer who is supposed to use Mobil 1 in a Z06, doesn't - doubt a sticker will help. The mechanics helper who often works the oil change bay and is changing trucks, Chevy Volts etc will use the easiest thing at their disposal. If that is some dexos approved cheap blend in a 55 gallon drum that is pumped to his fill gun so beit! He may also not take the time to under fill, start the engine, heat up the oil, wait 5 minutes but not more than 10 (per the C7 manual for dry sumps) check the level and top off as appropriate. That is what the 2014 Service Manual says should be done and what I have done changing oil in any car for 50+ years.

Some are apparently just using the volume fill chart or waiting to long to check the level,which can overfill the dry sump tank. If a dry sump is overfilled oil burps with the air from the dry sump tank to the air intake duct and will drip from the air cleaner!

Find a dealer who says they fill dry sumps properly with Mobil 1!

Chemdawg99

Exactly.

Chemdawg99

Exceedingly idiotic post.

MikeLsx

when i got my first oil change they told me they were using mobile one.

one my second oil change at a different dealership, they changed the oil without telling me what they put in. I later looked at the dealership paper, and saw a oil part number which i found was in fact mobile one.

So maybe you should look at that.

JoesC5

What about when GM spec'd their cars to use oil meeting their GM6094M or the C6 corvette meeting their GM4718M, or Merceces spec'ing their cars to meet M-B 229.3.

And other manufacturers do the same. Were they also scams? Since the car manufacturers have to tell the consumer what oil should be used in their products, how should they do it?

Should GM just tell their customers to only use GM oil? If they did, they would have to give it to their customers for free, according to federal law.

Instead they tell their customers to use any brand of oil that meets their specification "XYZ", or in case of GM, tell them to use any brand of oil as long as it meets GM's dexos specs.

The only difference between GM saying that you must use dexos instead of, say GM4718M, in your Corvette is that the various oil companies have to purchase a license to have their oil designated as meeting the dexos spec.

That is not against the law, therefore it is not an illegal "scam".

Steve_R

Mobil 1, not mobile one or mobile1.