The Random E46/ZHP Question Thread

[gmurphy]

OK. Looks like you've made your mind up.

On second though.. Lol. Redline for my diff is settled but tranny... Hmmm. How's the fluid you are using? If I recall correctly you have had experience with many different fluids so spill the beans!


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[danewilson77]

I've ran the Royal Purple, Red Line, and Pentosin in my ZHP.

I rank them:

1. Pentosin
1. Redline
3. Royal Purple

Have a ball.

Terra ran the Pentosin in his, and had positive things to say. His experience was good enough for me, and I'm glad I went that way.

Though I don't think you be doing a bad thing using the Redline.

[Newjack]

I've ran the Royal Purple, Red Line, and Pentosin in my ZHP.

I rank them:

1. Pentosin
1. Redline
3. Royal Purple

Have a ball.

Terra ran the Pentosin in his, and had positive things to say. His experience was good enough for me, and I'm glad I went that way.

Though I don't think you be doing a bad thing using the Redline.

I'm running pentosin in my trans and redline in my diff. BMW told me to use pentosin in my trans based off the sticker on the side of it.

I highly recommend you do not use royal purple. If I remember correctly, Keith put it in his trans for a little while and sent it to Blackstone for analysis. Blackstone grilled it suggesting to immediately take it out because it was causing damage.

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[gmurphy]

I've ran the Royal Purple, Red Line, and Pentosin in my ZHP.

I rank them:

1. Pentosin
1. Redline
3. Royal Purple

Have a ball.

Terra ran the Pentosin in his, and had positive things to say. His experience was good enough for me, and I'm glad I went that way.

Though I don't think you be doing a bad thing using the Redline.

Awesome thanks Dane!


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[gmurphy]

I'm running pentosin in my trans and redline in my diff. BMW told me to use pentosin in my trans based off the sticker on the side of it.

I highly recommend you do not use royal purple. If I remember correctly, Keith put it in his trans for a little while and sent it to Blackstone for analysis. Blackstone grilled it suggesting to immediately take it out because it was causing damage.

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Thank you too!


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[danewilson77]

I highly recommend you do not use royal purple. If I remember correctly, Keith put it in his trans for a little while and sent it to Blackstone.....
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I remember this as well.

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[JKO_ZHP]

Lurking around, I believe it's time to change the trans/diff fluid.

Just a few things though....
1) I asked my guy about Pentosin and Redline. He asked what specs for Pentosin (guess I'll have to do some more digging) and said Redline for the diff is a waste unless you are tracking the car. I have no idea what this means but he did say it's like getting R comp. tires and only commuting with them. Looking back I guess this means it's not cheap....? And there's other alternatives?

2) Same fluids for manuals work with autos?

3) What's the general consensus on when to change the fluid? Based on miles or time? I know most of us change our engine oil anywhere from 3,000 miles to 7,000 miles with 3k being the more conservative (PREservative) end but what about the trans/diff?

4) Flush or just change?

[Pip]

Well there are lots of options for the diff and redline is a popular one. If go with Mobil or redline just because availability and quality. For the ATF I strongly urge OEM, but that is expensive and hard to find. The new fluid BMW is selling is remarked dex6. There are many auto guys here that have used redline atf d4 and been fine. My tranny didn't like it so much. Not sure how many miles you have, but I'd change before 60k if possible. If you wait not a big deal because Gary and others have higher mileage autos and have done the fluid change late in the game. As for flush or change on the ATF do the change. You will be dropping the tranny pan and putting a new filter in so about 7-9qts...I think.

[Pip]

I think atf every 30k after your first one and the diff every 50kish? Dane has a pretty good log or maybe it was the Mike Miller sheet.

[KevinC]

My indy just changed the trans & diff fluids in my Z4MC, and used Redline in both. The differential lube was kinda stupid-expensive, but hey, in that exotic locking diff, I figure I should use the good stuff.. even if I mostly drive it like an old lady (well ok not MOSTLY, but...).