Z-Max
Drifting
Joined: Feb 2007
Posts: 1,993
Likes: 7
From: LaPine Oregon
Carol says................
http://www.ftc.gov/opa/2001/02/zmax1.shtm
http://www.zmax.com/micro_lubriucant/automotive/
I don't use additives in my transmission.
http://www.zmax.com/micro_lubriucant/automotive/
I don't use additives in my transmission.
CF Community Team
Joined: Oct 2004
Posts: 19,365
Likes: 5,244
From: Cape Cod, Mass.
2025 C6 of the Year Finalist - Unmodified
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Z-Max is designed for use in Fords only 
Race Director
Joined: Aug 1999
Posts: 11,121
Likes: 672
From: SE Pennsylvania
St. Jude Donor '03 thru '26
Oldtimer
If it was necessary, or more effective, GM would have used it. However, if it was me, I'd refill the transmission with RP ! 
Z-max and any of the TV miracle oils are just Hype and most fools chase after 'Miracle Oils'. . . Junk.
Z-max and any of the TV miracle oils are just Hype and most fools chase after 'Miracle Oils'. . . Junk.
Last edited by killain; Dec 21, 2009 at 06:35 PM.
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Melting Slicks
Joined: Apr 2009
Posts: 2,479
Likes: 36
PS: It's my aerospace way of thinking since in my field, it's all about meeting specification first and foremost.
Melting Slicks
Joined: Nov 2007
Posts: 2,001
Likes: 2
From: Auburn Michigan
I agree except, isn't Royal Purple sort of in the same boat? I mean, they don't meet the GM specification for transmission fluid or engine oil. I'm just playing devil's advocate here. I would never use Z-max but, why are the boutique oils such as Amsoil or RP any better than a good quality GM approved oil? I am not trying to start an argument but I am curious about what makes RP so much better and why don't they seek GM approval?
PS: It's my aerospace way of thinking since in my field, it's all about meeting specification first and foremost.
PS: It's my aerospace way of thinking since in my field, it's all about meeting specification first and foremost.
Le Mans Master
Joined: Sep 2007
Posts: 7,604
Likes: 8
From: Belleville Il
I agree except, isn't Royal Purple sort of in the same boat? I mean, they don't meet the GM specification for transmission fluid or engine oil. I'm just playing devil's advocate here. I would never use Z-max but, why are the boutique oils such as Amsoil or RP any better than a good quality GM approved oil? I am not trying to start an argument but I am curious about what makes RP so much better and why don't they seek GM approval?
PS: It's my aerospace way of thinking since in my field, it's all about meeting specification first and foremost.
PS: It's my aerospace way of thinking since in my field, it's all about meeting specification first and foremost.
Melting Slicks
Joined: Apr 2009
Posts: 2,479
Likes: 36
The best I can tell,,R P is just another brand of high quality synthetic oil products. It cost a ton of money to get the GM certification,,and probably is not cost effective for a relatively small company.The thing about RP is it has a good track record,,,literally and figuratively!!! Car Craft magazine did a dyno test on a carburetor car(no computer stuff) and then did a full RP change( oil tranny and diff). As I recall gained something like 8 to 10 horses. A lot of racers swear by it,,and haven't heard of anyone swearing at it. Run it in my tranny and rear,,no complaints!! Not a fanatic,,but I am satisfied!!
