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Old 08-18-2011, 01:30 PM   #1
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Default Pennzoil syncromesh?

leatherface24 from this forum told me that gm syncromesh was good for use in my trans. its 17 a quart so i looked around some more. i found Pennzoil syncromesh that says it meets standards and is equivalent to the GM. is this going to be a good option for me? also, can i use the same oil in the diff?
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Old 08-18-2011, 02:15 PM   #2
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I use Penzaids in Synchromesh in my daily and it does a great job and it lacks the evil EP additives. It's the affordable option to Amsoil MTG, but when I put the 6-er in my daily it gets the good stuff.

You want a GL-5 "gear oil" in the rear end. There is a difference between "manual trans lube" and "gear oil".
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Old 08-18-2011, 02:18 PM   #3
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I've been using the Pennz Synchro all this year in my autocrosser. Granted the car doesn't take long term abuse, but it shifts very very well now.
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Old 08-18-2011, 02:38 PM   #4
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how often do you change it? so something like this will work in the diff?

http://shop.advanceautoparts.com/web...7CGRP2035_____
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Old 08-18-2011, 02:55 PM   #5
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Quote:
Originally Posted by Clos561 View Post
how often do you change it? so something like this will work in the diff?

http://shop.advanceautoparts.com/web...7CGRP2035_____
100k miles

Yes, that's fine.
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Old 08-18-2011, 03:16 PM   #6
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Really 100k? Lol ok. Thanks
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Old 08-18-2011, 03:22 PM   #7
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You want to use a good GL4 in the trans. I like GM syncromesh, which is not the same as Penzoil syncromesh.

If you have a 5 speed, it will likely eat either and not care. If you have a 6-speed, then pop for the GM stuff.

I've used Mobil, RedLine, and RoyalPurple in various diffs. All seemed fine.
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Old 08-18-2011, 03:26 PM   #8
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i usually change mine every year.
edit: but i track it alot.... in terrible heat.
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Old 08-18-2011, 03:50 PM   #9
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Do you have a 6 speed or 5 speed? The 5 speed will take just about anything. The 6 speed needs GL-4 oil. Most of the track guys run Amsoil MTG. Pm and I can get you contact info for where you can get amsoil at cost.
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Old 08-18-2011, 03:54 PM   #10
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Old 08-18-2011, 03:58 PM   #11
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Quote:
Originally Posted by spoolin2bars View Post
i usually change mine every year.
edit: but i track it alot.... in terrible heat.
I sent in an analysis last year and Blackstone told me not to change it and I still had a 100*c CST score was the same as when new. There was no change in lubricity or viscosity. However, I probably could have made some money from recycling all the yellow-metal synchro material that came out.
Quote:
Originally Posted by shuiend View Post
Do you have a 6 speed or 5 speed? The 5 speed will take just about anything. The 6 speed needs GL-4 oil. Most of the track guys run Amsoil MTG. Pm and I can get you contact info for where you can get amsoil at cost.
They have the same type of synchronizers and both should use GL-4 from what I've read. I've had bad experiences with GL5 gear oil in the trans.
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Old 08-18-2011, 04:02 PM   #12
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All of our cars get Amsoil MTG in the tranny, SVG in the diff.
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