just curious all i hear is royal purple and mobil 1 being used in c5 vettes. so if i was to put quaker state synthetic or valvoline or castrol synthetic into my c5 at oil change it will seize up. and i will regret it?????? is synthetic oil that much different than one another like gasoline grades???? if i put high octane gas in car does it matter if it is shell, sunoco, sheetz or anything else???

 

You can put any synthetic oil that meets GM's standard (it is in your owner's manual) in your C5 with confidence that it will perform well. I use Mobil 1 in all my cars !

I use only a Top Tier gas (see toptiergas.com) in my C5. If you don't, you will probably have fuel gauge problems sooner or later AND MAY have some fuel system (injector) problems. I use Shell gas.

 

There are a couple of different brands that meet or exceed GM4718M (Corvette standard). If you use one of those you should be fine. Naturally, you can put anything you want in YOUR car.....but in my car the oil has to meet the standard, and I prefer Mobil1.

There have been literally dozens of threads over the years about this, and usually there are several people that jump in with information and have their oil tested for metal particles, and fairy dust.

Personally - if the Mobil1 was good enough for Chevrolet to make it the factory fill (along with other OEM's like Cadillac, Porsche, Viper, Mercedes, etc.) then it's good enough for me. It's that simple.

 

Mobil1 for me.

 

As long as it meets GM Standard GM4718M (at least that is what it says in my owners manual), you should be OK. I too prefer to stick with Mobil 1.

 

Good to see grammar is alive and well.
Mobil 1 here.

 

mobil 1 for me!!!!!

 

mobil 1 for me!!!!!

 

Mobil 1 is good... but why settle for good? You can be safe with M1, but I prefer to upgrade to Royal Purple when I can.

-Alex

 

Buy a Vette and cheap out on the "life blood" ??

Not me...

Mobil 1

 

 

do like me...use am all! i rotate mobil one with royal purple then amsoil hell i use all the crazy additives too! engine runs like a bat out of hell! woohooo!

 

I agree with blacksedan87. If an oil meets the GM spec than I'd be happy to use it.

I brought back some Mobil 1 from the US to make sure I can keep going for a while. I'll use that until I run out then see whats on the market here

 

Oil meeting the 4718M spec is synthetic oil. It's a 100% synthetic oil that is not the usual base stock from crude oil. Instead, it is synthetically built in the laboratory from the ground up on the molecular level to create a "polyalphaolefin" (PAO) base stock. "Blends" of synthetic oil that are cheaper than the true 100% synthetic typically are crude stock with added chemicals that "hydroisomerize" the crude base stock to remove some of the undesirable molecules... like wax. They're removed in a laboratory chemical reaction (so they can be considered "synthetic")...but they're still from crude base stock and so are not to be used by us.

The reason is, the further from true PAO base stock you get and closer to the hydroisomerized base stock you get, the more oxidation (thickening) and volatility (boil-off) you can get at higher temperatures. The spec that a Corvette calls for, 4718M, was created by General Motors FOR Corvettes. PAO synthetic oil is also called for in Porsches, Vipers, and all AMG models from Mercedes-Benz.

I think I'll stick to my Mobil 1. but you can probably use any high-quality PAO synthetic oil meeting the 4718M spec. Of course, you could put any old Fram filter on your car, too!

 

I use Wal-Mart 10-40 regular.

 

I hears ya Junkman......10 gallons for five bucks....yeeehaw.....and you don't have to change it until it comes up on sale again.

 

 

get outta here with that. this has been discussed to many times.

My last change I used Quaker State Q full synthetic.

Mobil 1 is factory fill for corvette, and Q is factory fill for Ferrari
but really, who gives a crap

 

My
04 manual states:

Your vehicle’s engine requires a special oil meeting
GM Standard GM4718M. Oils meeting this
standard may be identified as synthetic. However,
not all synthetic oils will meet this GM standard.
You should look for and use only an oil that meets
GM Standard GM4718M.

 

Does anyone know what that standard signifies anyway ?