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I have a 2012 smart car, can I use valvoline full synthetic 75w-90 gear oil in it? I keep reading about Redline but haven't seen anything on valvoline, is it the same as castrol bot 328?
 

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Go with the Valvoline. I went with the heavier 85w-140 and the noise and jerkiness went away. Back of the bottle has the Mercedes ANSI rating too!
 

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In my case there wasn't much to add other than peace of mind that I was using what the manufacturer recommended. I read a lot of horror stories about using the wrong type and weight. So change was inspected for foreign objects and copper presence and there was none. Shifting was somewhat smoother and more precise, but that's about it.
 

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Few choices for the gear oil:


Here's one:


Sent from my moto g(7) power using Tapatalk
Thanks for the info. I am slowly building a database of what is closest to spec and what is not. The other issue, of course is additives. There are in the case of Cittroens, multiple oils which do not have the additives which the OEM lubricant includes.
 

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Thanks for the info. I am slowly building a database of what is closest to spec and what is not. The other issue, of course is additives. There are in the case of Cittroens, multiple oils which do not have the additives which the OEM lubricant includes.
The bevo.mercedes-benz.com site has all the spec fluids:


Go to “Specified xxxxx” for what is the Sheet #, then search for that Sheet # for approved/tested fluids...
 

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I bought "Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant" Is that ok to use??

Also, once drained, do you just keep filling until it overflows a bit?
 

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I bought "Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant" Is that ok to use??

Also, once drained, do you just keep filling until it overflows a bit?
I am asking this question because I don't know if this affects the gearing in the smart GB. I own several Citroen 2CVs and at one point people wanted to ensure best lubrication for these older gearboxes and they used a EP GL-4 lubricant whose additives slowly wore away the platings on these gears.
Is this something we have to worry about? ZF makes the gearboxes, right?
 
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