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QUESTION: What is GM4718M and what oil can I use besides Mobil1?

ANSWER: GM4718M is GM's specification for synthetic motor oils. theres only a handful of oils that actually are registered under this spec. These are the only oils you are supposed to use.


Chevron Supreme Synthetic 5W-30, 10W-30 GF-4

CITGO SUPERGARD Synthetic 5W-30, 10W-30 GF-4

Mobil 1 0W-30, 5W-30, 10W-30 GF-4

Northland, Synergy Synthetic 5W-30 GF-4

Pennzoil Platinum Full Synthetic 5W-30, 10W-30 GF-4

Texaco Havoline Synthetic 5W-30, 10W-30 GF-4
 

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mobil 1 5w30 or 10w30 for me, but seeing that you have a 69 i dont know what they recommended for that year? iI know some people use royal purple instead of mobil 1 maybe?
 

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Mobil 1 here:thumbsup:
 

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What is GM4718M and what oil can I use besides Mobil1?

GM4718M is GM's specification for synthetic motor oils. theres only a handful of oils that actually are registered under this spec. These are the only oils you are supposed to use.


Chevron Supreme Synthetic 5W-30, 10W-30 GF-4

CITGO SUPERGARD Synthetic 5W-30, 10W-30 GF-4

Mobil 1 0W-30, 5W-30, 10W-30 GF-4

Northland, Synergy Synthetic 5W-30 GF-4

Pennzoil Platinum Full Synthetic 5W-30, 10W-30 GF-4

Texaco Havoline Synthetic 5W-30, 10W-30 GF-4

I noticed that mobil 1 0W-40 is not on your list, is it ok to still use 0W-40 because I've been using since the last two oil change. I'm using it because of other member suggestion and I live in phoenix area.
 

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Based on my own experience and what I have heard from others, I don't think you can go wrong with Mobile 1....
 

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I used Penzoil Platinum, 10w-30 for my last change, as it was priced very well compared to Mobil 1. I also just bought Q state--which is advertising hard that Ferrari recommends it in 5-30 and 10-60, believe it or not. I'll use the Q for the Jeep--paid a buck a quart! Can't get regular for that anymore. Probably go with Penz platinum for the next change in the Vette. I also bought Valvoline synthetic because it was dirt cheap. Use it on the G5 next time--just like the last change. When you can get synthetic for the price of dino, why not? But I will stick to GM standard for the Corvette.:thumbsup:
 

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I noticed that mobil 1 0W-40 is not on your list, is it ok to still use 0W-40 because I've been using since the last two oil change. I'm using it because of other member suggestion and I live in phoenix area.

Mobil 1 0-40 is what the C6s in Europe use as OEM spec oil. The write ups have the 0-40 as one of the very best available.
 

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I use Mobil 1 15-50 EM

:cheers:
 
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