Lotus Elan

REDLINE OIL HELP

PostPost by: gearbox » Fri Dec 20, 2013 9:11 pm

Hi all, looking for some direction with gearbox and diff oils. Seems like from the older posts MTL for the gearbox would be the recommended product, although there have been reports of excessive leaking as with all synthetics and older cars. But in rebuilding my gearbox, I RTV'ed all the gaskets and bolts so I think I should be ok, so one US quart bottle should be enough yes? As for the diff, should I use the same stuff or use the MT-90 which is a 75W90 weight oil and should 1 US quart be sufficient? Looking for the collective wisdom of the board so if there are any other better options, please reply.

On another note, what are we using for coolant these days? Redline also offers a "Super Coolant" with water wetter which I believe still has to be mixed with regular antifreeze. Given the cast iron and aluminum materials of our cars, and the more than likely fact that they tend to sit for long periods without use, what would you recommend or suggest. Thanks for your input Allan
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PostPost by: rgh0 » Fri Dec 20, 2013 11:20 pm

Use Redline MTL 75W-80 for the gear box - it takes 1 litre.
Use Redline 75W-90 GL5 gear oil for the diff it takes 1.2 litres.

The MTL and MT-90 are GL4 oils optimised for gear box performance and not suitable for the hypoid diff.
The 75W-90 GL5 gear oil is optimised for hypoid diffs like in the Elan.


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PostPost by: gearbox » Sat Dec 21, 2013 7:54 am

Thanks Rohan, 2 US quarts of each it is.
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PostPost by: timax » Sat Dec 21, 2013 11:44 am

Im a big fan of the Water Wetter. In my Lotus 7 style car i use Castrol coolant with the Redline Water Wetter added for safety. Im in the city center of Sydney Australia and today it was 40 deg C in parts of town so anything that will help if i get stuck in traffic is a good thing. I get water temps up around 95 deg C at times but never boiled.
Just good insurance if your in a hot environment.
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PostPost by: Tahoe » Sat Dec 21, 2013 5:59 pm

rgh0 wrote:Use Redline MTL 75W-80 for the gear box - it takes 1 litre.
Use Redline 75W-90 GL5 gear oil for the diff it takes 1.2 litres.

The MTL and MT-90 are GL4 oils optimised for gear box performance and not suitable for the hypoid diff.
The 75W-90 GL5 gear oil is optimised for hypoid diffs like in the Elan.


cheers
Rohan


Rohan,
I was just going to order some for myself and found 70W-80 and 75W-85 but no 75W-80 MTL. I'm assuming the 70W-80 is correct.
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PostPost by: RichardHawkins » Sat Dec 21, 2013 8:10 pm

Which Oil? By Richard Mitchell is an interesting and informative little book. Costs about ?7 in the UK. I think the author is Australian.

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PostPost by: rgh0 » Sat Dec 21, 2013 10:41 pm

Tahoe wrote:
rgh0 wrote:Use Redline MTL 75W-80 for the gear box - it takes 1 litre.
Use Redline 75W-90 GL5 gear oil for the diff it takes 1.2 litres.

The MTL and MT-90 are GL4 oils optimised for gear box performance and not suitable for the hypoid diff.
The 75W-90 GL5 gear oil is optimised for hypoid diffs like in the Elan.


cheers
Rohan


Rohan,
I was just going to order some for myself and found 70W-80 and 75W-85 but no 75W-80 MTL. I'm assuming the 70W-80 is correct.



Yes i forgot they have now 2 grades of MTL use the 70W-80 like you say

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