Eric, before you use anymore Z-max, I think I would go to this link and read what the FTC has to say about it.

http://www.ftc.gov/opa/2001/02/zmax1.htm

Saw it -- and have to say that when I used it, it performed as promised fuel-wise, but felt no difference in engine or transmission behavior.

I see that article is dated Feb 2001. Here's what I found in followup:

FTC v. SPEEDWAY MOTORSPORTS, INC., No. 1:01CV00126 (M.D.N.C.)

Parties:

Speedway Motorsports, Inc.
Oil-Chem Research Corp.
Assigned Attorneys:

Jonathan Cowen (BCP/ENF)
Edwin Rodriquez
Craig Lisher
Laureen Kapin
Michael Ostheimer (BCP/AP)
Melvin H. Orlans (OGC)
Alleged Conduct:

Deceptive practices in violation of Section 5, in connection with the marketing and sale of fake motor vehicle lubricant.
Status:

Complaint filed 1/31/01.
Trial deferred pending possible settlement


Now I iunderstand why I have not seen it for so long.

__________________
2008 E350 4matic / Black/Anthracite

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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black

where did you buy this powerfoam and do you know of other stores that sell it?

__________________
'95 s500 (bought for wife but can't bear to share!!!) 125kms
'92 legend 180kms
'88 tbirdturbo(fantastic car-only regular maint.)120kms
'87 mustang gt(gone)
'86 tbirdturbo(gone)
'85 mustang gt(gone-but not forgotten)

A friend of mine sells Amsoil products and I usually just get my stuff through him.

I am considering signing up for Amsoils preffered buyer program though, it allows you to buy their pruducts right from their website at dealer cost. The annual fee is $20.00 but I beginning to think I would save that much in no time if I was buying at dealer cost.

Go to this site for more explanation on their products, just one more note is their 10W-30 meets MB 229.3 specs. It is an excellent oil that will last 25k miles. I personally can't get myself to leave it in the that long but I have gotten better and now "only" change it a 5k mile intervals

http://www.amsoil.com/