hi all,
which should i use?

any dangers using amsoil?

thanks!

https://www.amsoil.com/StoreFront/Se...D=43&zo=501359

http://www.fordracingparts.com/parts...=Differentials

 

I running Amsoil in the engine and RP in the transmission and rear end.

 

First of all, the price of the two Ford Racing friction modifiers must have a typo: $3.75 for one of them and $42.00 for the other. Which is it?

 

Redline 75w140 it has the friction modifier in it already.

Richard

 

Very good point Richard.

 

When I had my rear re-done, the installer used Royal Purple, and I wound up with clutch-pack moaning... R&R the fluid with Motorcraft, with Motorcraft friction modifier, and no more noise... Just my experience...

 

OK so why are you quoting me I did not suggest he use RP.

The Motorcraft 75w140 is almost double the cost of Redline Oil and the Redline is far superior. I have been using Redline for well over 20 years and it has always cured clutch pack chatter.


Richard

 

thanks soundguy..

motorcraft XL friction modifier it is!

 

do them both if you hear noise

 

My apologies... My post SHOULD have read: "...Royal Purple, which also has friction modifier in it, and I wound up with clutch-pack moaning..." My intent was to present info that a competing product to the Redline, which is supposedly a functional equivalent, did create issues...

 

No problem. I myself do not like RP and would never use it in anything i own. But I do not like saying that as it tends to cause a ruckus. I have seen a few independent test over the years and RP does not hold up well in any of them.

Like I said though i have been running Redline Oils for a long time and it has always cured any clutch pack chatter i have and in fact we use it at the shop i work for. It is the only thing we will use to get rid of the chatter if someone complains about it.

Richard

 

I have a Detroit/Eaton Truetrac differential, so no synthetic gear lube or friction modifier for me! I'm using Shell Spirax HD 85w140. It's only $5 a quart vs. $22 a quart for the Motorcraft 75w140 synthetic gear lube.