HPL Manual Transmission Life in MT82
- Thread starter rydaddy
- Start date
Curious about this as well. I have 6k miles on the Ford DCT fluid and it is just ok.
Currently running Amsoil DCT fluid. If it was an improvement over the factory fill it was minimal. 1-2 can be a little notchy at times. Not terribly bad though.
MolaKule
Staff member
Which one?
edyvw
$50 site donor 2026
I use HPL MTL 75W in BMW.
It is very good when cold; however, I am not that happy when the fluid gets hot. For normal driving, it works well, but it would not take the car to the track with it, and when driving spirited, don't feel comfortable shifting really fast. Numerous times, I almost ended up in third instead of fifth.
Probably 75W75 or 75W80 would do much better. I would say 75W is thicker than what you have now, though.
It is very good when cold; however, I am not that happy when the fluid gets hot. For normal driving, it works well, but it would not take the car to the track with it, and when driving spirited, don't feel comfortable shifting really fast. Numerous times, I almost ended up in third instead of fifth.
Probably 75W75 or 75W80 would do much better. I would say 75W is thicker than what you have now, though.
David mentioned the 75W as a possibility. He said he knew of no one using it in this application.
What is the factory fill in your BMW?
edyvw
$50 site donor 2026
It is I believe Pentosin, similar KV100 as 75W.
Prior to that, I used a bit thicker Redline D4 ATF and it worked really well. But was 1cst thicker though.
In your car I am thinking 75W will be thicker than DCT fluid, so you should not have issues when hot.
When cold shifts are rally good.
I'm running Redline D4 ATF in my 6-speed M6. It shifts great, cold and hot.
edyvw
$50 site donor 2026
Yeah, that seems go to for BMW.
I did not. I ended up using Amsoil DCT again with no complaints. I hear of a lot of folks using the BG syncroshift with good results. Thanks!
Are you using the BG Universal MGC additive along with the BG Synchro Shift II fluid?
I am seeing this as an option and considering this on my next service.
Yeah I’ve got the MGC additive mixed in with the Syncroshift II. Not a fan that there’s not a lot of good info out there about what the stuff actually is but a lot of people seem to use it.
The combo did clean up the shifting in my MT82. With the factory DCT fluid I’d occasionally get a resistance I’d have to push through when going into gear and that went away entirely.
I’m going to try the HPL manual transmission oil this summer, it’s significantly cheaper and I’m curious how well it will work with the synchros.
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