CallawayZ06Houston

I am waiting on the 2017 Z06-Callaway, and I read in the manuel that says use Mobil with Dexos1 approved oil, yet all I can find anywhere is Mobil 1 Dexos2, is there a difference or is that just a newer, better version of Dexos approval?

Snake.Oiler

That would be dexos, with a small 'd'. about dexos: http://www.centerforqa.com/dexos-about/

dexos1 - for gasoline engines (green logo)
dexos2 - for diesel (blue logo)

Don't confuse dexos2 with dexos1-Gen2

Bill Dearborn

It looks like it is just fine to use in your engine. Dexos 2 is for either diesel or gasoline vehicles. GM recommends it in Europe where Dexos 1 oils aren't available.

http://www.smithspecialty.com/blog/g...os-2-motor-oil

Bill

okaythen

local dealer uses ACDelco dexos1 Full Synthetic, how is it? better or worse, should I bring my own oil.

AzDave47

My recent WallyWorld purchase of M1 5W-30 Extended protection oil was listed as Dexos 1.

FYI all, free oil changes under the GM maintenance program get reimbursed by GM at Mobil 1 prices. If your dealer uses other (cheaper) Dexos 1 oils, they are giving you a cheaper product and getting paid from GM for Mobil 1. They are cheating you if they do this and many have been reported to be doing this.

GM has even issued a bulletin that tells customers that if the dealer "up-charged" for using the Mobil 1 on the free oil changes, to notify GM, provide a copy of the receipt and GM will reimburse the customer. for the additional dealer charge. I would hope (but not expect) that GM would notify the offending stealers that they were committing fraud against GM for the warranty claim while also charging the customer for the price difference.

okaythen

thanks that helped, went to another dealer and they used M1 dexo1 full syn 5w30. Oil - GM (12345885).

ddealer put a sticker for next oil change, in 5k miles or half year I think. They are really good oil they can go up to 7500 right or 1 year. But 5k, 6k to be safe. Actually the oil life monitor is good right, very accurate I will just go by that instead of dealer, dealer just wanna make money!!!!

AzDave47

I have done performance events with M1 5W-30 and then 0W-40 and sent samples out to Blackstone Labs for analysis. Even at 5K or 6K miles/1 year all the oil tests came back fine and the additive package was still strong. Usually the oil life monitor in each case still showed 30-40%. Now after HCI work I am at 5K miles/1 year and the monitor is showing 40%+ oil life remaining. I took a sample at 600 miles after the build and it was fine. I will do my next oil change soon. 14 of 16 valve guides were shot at 46K miles even with good oil tests, so the tests don't identify everything.

383vett

If you are talking about C6Z valveguides, that is a whole different world. My C6Z valveguides were shot at 30K with no track time. It was the nature of the beast back then.

okaythen

very interesting, keep us updated that would be great!

So I will just go back oil life monitor, sounds like it's intelligent and reliable

mdz06vetter

Since 2011 when GM came out with there dexos specification it has been a requirement to maintain your warranty to by using a motor oil that is dexos-licensed or meets dexos specifications. NO conventional motor oil can meet the extremely strict dexos oil specs, so you will need to use a synthetic blend or full synthetic oil.

To have an oil dexos-licensed by GM, oil manufacturers must pay a licensing fee and complete a program administered by The Center for Quality Assurance. This dexos licensing program requires oil producers to be facility accredited and undergo product testing prior to final licensing.

cdh027

So does that mean my beloved Amsoil is a no go?

2fastnow

I had a Lexus 460 way back...We put Amsoil in it for nearly 50,000 miles cause the warranty was there. I only changed the filters. I took the covers off....no mud. Never burnt oil, nothing. Had it 220,000 miles, gave it to a wife's friend, they loved it! Changed it three times total!!
That's why I believe they started mixing 'Earth oil' in it so it showed breakdown. Strait synthetic oil never breaks down much but do get dirty in gas motors. Diesels, you can keep it there forever.

mdz06vetter

check the following link for the current dexos-licensed oils approved by GM - http://www.centerforqa.com/dexos-brands/

do NOT see Amsoil of any kind listed as having been submitted / being licensed by GM

2fastnow

Yes I would use what GM says. It's in there best interest that the car works right.

mjdart

I purchased and installed a Mobil 1 Oil Fill Cap from the Trunk Monkey so there's no doubt by the dealer what to pour in that dry sump system.



Mobil 1 only for my Z06

mdz06vetter

yepper, important thing to remember as has been mentioned before look for an oil with the dexos Gen 2 specification

AzDave47

Yes, 09 LS7 valve guides, all exhaust and 6 of 8 intakes, none real bad (.0100) but some more than twice the .0037 spec.

Road course work was 4-7K rpm but most street driving under 3K rpm including 1000 RPM in 5th and 6th from time to time.

okaythen

How will this affect the warranty, after my 500 miles oil change dealer puts a sticker telling me the next oil change is 5500miles and within 6 months or 7 months. I think dealers just want you to change it earlier so they make more money I might just go with whatever comes on first, the oil monitor, 7500 I believe the oil is good for or manual says 7500 miles too and if it's mostly highway, and up to 1 year if miles never get that high.

Now later if the engine have some problems do you think dealer will say you didn't follow our sticker so we aren't going to warranty your engine. That would suck! so...? Maybe better to go with the dealer?

AzDave47

Dealer sticker isn't part of the Warranty. Follow the OM, you will have no problems.

I had a 2003 BMW M3 that had dealer free oil changes, when the oil monitor said time for a change. With an 8200 RPM redline, I wasn't willing to go 14-17K miles before changing the oil, so changed it on my own half way on the oil monitor.

CaryBob

I'm surprised that people can go as much as 5,000 miles and not drive the monitor to zero. My oil change monitor, which counts revs rather than miles, gets down to 10% after barely 3,000 miles. I had five oil changes in the first 13,000 miles, but then I'm not putting on freeway miles.