Okay i have a 1980 MBZ w126, IF i ever want to sell my car (which i dont -never hopefully) how would i proff that i took care of the car ? i do an oil change every weekend and trany change of fluid every month. I drive probably 70 each day miles M-F

You change your oil every 350 miles and your tranny fluid every 1500 miles, why?

Stacks of receipts and used filters, and drums of old oil and ATF should be evidence enough

Sixto
95 S420
87 300SDL

hahaha which you reminded me of i have 15 gallons of used oil that i have to go recycle! hahaha

The reason why i change oil so much ? i dont know --over protected, i have really bad luck with cars hahaha.

First STOP wasting oil. Changing your oil every weekend is a complete waste of money. You didn't say which car you have. Do you live in the U.S.? The 126 chassis didn't come here until model year 1981.
This bad luck you had previously, was it oil related?
I have 3-ring binders (notebooks) that I use to track all maintenance records. I don't keep every receipt from Walmart for the oil I buy, but I do write down when everything is done. If you do go to sell the car and show someone that you kept track of all the maintenance, then that should be proof enough.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member

and the buyers usually prefer to see receipts for the purchase of the fluids etc. The only thing is, that even showing them that doesn't prove anything. Hell, I could buy all that oil and use it on a different car. For all they knew the oil in the car was the factory fill. I agree with rickjordan, just keep notes of it and show them. You'll drive yourself crazy keeping all of the receipts and it can get messy. If the buyer can't be satisfied with that they're either anal or just being difficult to try and get the price down.

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2004 Chrysler Crossfire

My maintenance records go in a handwritten log book. I've never had trouble assuring the next buyer that the car was well taken care of. Most people can tell that I'm a car guy and appreciate that there even IS a log of the maintenance done on the car.

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95 E320 Cabriolet, 159K

Yeah, I find that its typically the people who are "tire kickers" that want the full receipt logs for maintenance. They're not totally informed or totally clueless. They ask the standard questions and don't go much deeper than what your average "what to do before buying" guide tells them. And in selling a car such as MB or BMW some of the people I've dealt with used the lack of receipts (though I had log books) as a bargaining chip. They basically wanted a dealer maintained car for a below private party price. None of it matters because the right buyer will come along that's genuinely interested in the car and not so much the presitge (at a bargain price). Just keep a log of it and wait for the right person to come along.

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2004 Chrysler Crossfire