Ok, I go to the dealership I bought the car from to get my passenger seat looked at/fixed. The seat issue is no big deal, but I knew I'd be waiting on part(s) and have to take it back.

Anyways, while I'm there I ask the service manager about how long can you really go between oil changes. (I got the car end of June-now with 5300 miles and no oil indicator). Without answering the question he says since my first oil change is free, let's do it now. Sounds good to me so I tell him to go ahead. An hour later they pull it around, tell me my new seat frame has been ordered and I'm all oiled up.

On the way back to the car I read my receipt - Pennzoil? :blink: Pennzoil?!? :huh: I march back the the service manager and ask him about the change up. I also discover they used conventional oil no less. :angry: I know what came in the engine and say so, but he says the only difference between the two is the price. ($60 for Mobil 1) Now the manager gets on the phone to someone (at my insistance) to see if they used the right stuff, and if he really called someone they told him to say it was alright. :bs: Unconvinced, I call over the salesman I bought the car from who convinces him to at least put synthetic in, which they did. That got me out the door, but I've had nagging doubts since then and looked up the data sheet for the oil they used. The manual says to get oil meeting "GM Standard GM4718M". What they put in meets standard "GM4718" - no "M". Does the "M" matter one way or another? :unsure: Is our resident chemist out there?

I just checked both my owners manual (05) and my 5 gal. jug of Mobil 1 right off the shelf at WalMart and it says GM4718M specs. I don't know what the "M" means but I'll try to find out. The jug also states that it meets a bunch of manufacturer specs including the Vette, Porsche and others.

What brand of synthetic did they put in? How do you know the oil meets GM4718 specs but not GM4718M specs? Sounds like your service manager is a moron. Regular oil is OK in the 04 but not the 05 LS2. Also, as I have mentioned in another post, beware of the Mobil 1 jugs that have some "extended" claim on them (looks like a premium version of the regular Mobil 1) that DON'T have the GM4718M spec seal on them. I don't know what's in those, but it doesn't meet the LS2 specs even though it does say Mobil 1 5W-30 on the front.

I think you mean 5 qt. jug.

Apparently they used Pennzoil Ultimate full synthetic. pdf datasheet (http://www.pzlqs.com/Tech/Pdsheet/DomesticMarketing/EngineOils/Pdf/PlatinumFullSyntheticMotorOil.pdf)
I think the saleman overstepped himself when he promised the 1st change free. When I picked up my keys the second time, the cashier was like :blink: "A free synthetic oil change...Wow." Sheesh, it's not like it was in writing, they coulda' backed out. Why send me on my way with something that would cause problems?! :angry:

Originally posted by ZQ8@Oct 3 2005, 02:35 AM
I think you mean 5 qt. jug.
It would be nice if I could get a 5 gallon jug. Maybe it would be cheaper/qt. :afro:

Yeah, well, I looked at the price and thought it held 5 gallons. Sure was disappointed when I got home. :D

Good point and funny!

buy,change,check and fill adjust level of oil yourself...leave nothing with that to chance...I believe that everyone who visits this website either knows how to or knows someone who can change the oil....save receipts. 2 cents :type:

I just bought a 6 quart pack of Mobil 1 at Costco for 25 bucks---I thought that was a pretty good price, even though you're half a quart short. I bought 3 of them, so I have enough for 2 oil changes.