Hi everyone.
Could someone explain what lies between OEM approvals for manual transmission fluids and what are the differences between them ? For exemple MB 235.10 or PSA B71 2330, every manufacturer has them, Volvo, VW, BMW etc. How much of it has to do with commercial agreements or simply fluids that are required for the warranty to work ?
Mercedes manual gearboxes require the 235.10 approval but it is really hard to source and the options are very few. For exemple i was looking at a cheap bottle of synthetic 75W-80 GL-4 that i can find everywhere and it had all the PSA, VW, BMW approvals and some more while something similar but with the 235.10 approval is really hard to find. What makes it so special and different ? Can i still use other GL-4 oils without it ?
I'm starting to think that this is a somewhat outdated spec for warranty purposes and that any modern GL-4 oil will do but correct me if i'm wrong. It's kind of the same thing with Mercedes rear axle, the spec is 235.7 but no one bothers with that, at least for the older cars and it never causes issues however i didn't find anything about manual gearboxes.
Could someone explain what lies between OEM approvals for manual transmission fluids and what are the differences between them ? For exemple MB 235.10 or PSA B71 2330, every manufacturer has them, Volvo, VW, BMW etc. How much of it has to do with commercial agreements or simply fluids that are required for the warranty to work ?
Mercedes manual gearboxes require the 235.10 approval but it is really hard to source and the options are very few. For exemple i was looking at a cheap bottle of synthetic 75W-80 GL-4 that i can find everywhere and it had all the PSA, VW, BMW approvals and some more while something similar but with the 235.10 approval is really hard to find. What makes it so special and different ? Can i still use other GL-4 oils without it ?
I'm starting to think that this is a somewhat outdated spec for warranty purposes and that any modern GL-4 oil will do but correct me if i'm wrong. It's kind of the same thing with Mercedes rear axle, the spec is 235.7 but no one bothers with that, at least for the older cars and it never causes issues however i didn't find anything about manual gearboxes.