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Another post on gear oil ... need help choosing
Hi all,
i've passed last two days reading on about gear oils, but I still need your precious suggestions. My local dealer (in italy) can only provide Castrol Syntetic oil (GL4), non suitable for my transmission or Motul 80W90 GL5 Dino based. (No Swepco, No Kendall NS-MP, no RedLine). Here are the two Motul products Motul HD 80W90 -> Mineral Oil, API GL-4/GL-5 ----> product page Motul Gearbox 80W90 -> Mineral Oil, API GL-4/GL-5, Moly reinforced ----> product page Price difference is negligible (about 2$ more for the Moly reinforced) and looking at Motul site both seems to be suitable for my transmission. My transmission is a 915 stock transmission from 1973 never rebuilt and it has 85000Km. I think it’s in good shape because it don’t grind, isn’t noisy (just a little bit), but sometimes, especially when hot, it’s hard to shift from 1st to 2nd (upshift) and from 5th to 4th (downshift). Can you please tell wich oil should I prefer ...aka ... to moly or not to moly ??? ;-) I ask because I learned i have to avoid syntetic oils in 915s but is there any contraindication with Moly additives?? |
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07-04-2016, 11:09 AM
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RETIRED
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I sear by Swepco 201. never used the ones you list.
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1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
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07-04-2016, 11:18 AM
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Registered
Join Date: Aug 2009
Location: PNW
Posts: 2,977
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Swepco sucks!!!
(It's in green! It's in green!!!)
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'84 Carrera Cabriolet |
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07-04-2016, 11:27 AM
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Dear Joe,
you're a lucky man... 'cause you're in USA ... I'm from Italy and here there is no Swepco importer. Shipping cost from US to Italy are about 60$ (pelican or ebay) ... and i prefer to pay for the oil and not for the shipping ! ;-) Anyway the difference between Motul HD and Gearbox should be similar to Swepco 201 and 203. Is there a definite reason why you choose 201 ? Have you ever used 203 ? Why do you still prefer 201 above 203? |
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07-04-2016, 11:29 AM
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Registered
Join Date: Dec 2008
Location: San Antonio, Texas
Posts: 3,590
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Either one is a good oil, use the Moly if you have a noisy box.
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1973 911S (since new) RS MFI specs 1991 C2 Turbo |
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07-04-2016, 11:30 AM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,539
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The Motul is an excellent gear oil. Stay away from the moly version of you have an lsd. Its too slippery.
Regards, Matt Monson guard transmission llc
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1974 914 Bumble Bee 2009 Outback XT 2008 Cayman S shop test Mule 1996 WRX V-limited 450/1000 |
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07-04-2016, 12:19 PM
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thank you for your help matt.
For what i know my transmission is non-LSD it serial is 915/03 733xxxx (it miss the 12). I'll go with the Moly version and i'll post my impressions about. |
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07-04-2016, 01:24 PM
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Da cab
