LUCAS in the engine and tranny?

whiterabbit · Post by **whiterabbit** » Sat May 14, 2011 11:04 am

Finally got some GL1 from Nappa and a 12mm allen wrench and was gonna'a change the tranny fluid and was thinking of putting some Lucas additive in too. I've had great results in engines,trannys,and axles with it but always safe to ask first. Ok to use in axle and 5speed tranny?
Thanks
'81 FI spider with 75,000 miles on it.

coise · Post by **coise** » Sat May 14, 2011 12:04 pm

Fiat recommend GL1 with specifically no additive. The addditive will most likely stop the foaming effect of the GL1 and because it contains zinc dialkyldithiophosphate that will wear out the brass synchro inside the tranny, it happened to me...

Also don´t put 20W50 engine oil in it, like some people recommend, once again it contains harmful modern additives, and you will have a bad suprise after a few hundred miles when the trans starts singing ...

You can get the right oil from VICK´s or other part suppliers.
That my suggestion I hope that will help.

pressonregardless · Post by **pressonregardless** » Fri Aug 12, 2011 8:44 pm

There are countless Threads stating only Transmission: NAPA SAE90 GL-1. Part# 65-201 GL-1 ONLY!!!!!

Lucas is a great product, engine, sure. 40 year old brass syncro tranny, NO.

124ADDHE · Post by **124ADDHE** » Sat Aug 13, 2011 9:22 am

20-50 is fine, anyone who claims otherwise has never used it....believe me, engine oil DOES NOT eat metal...simple fact!

EP is different. Many people run 20-50, if you dont like it then fine, dont use it but surely dont preach it to be anything oither than an option.

124cso · Post by **124cso** » Sat Aug 13, 2011 10:35 pm

Oil companies make engine oils and they make gear oils. Very rarely you might find a 'universal oil' but that is generally for tractors and the like using a Hydramatic type semi-manual trans.
The old British Leyland (original) Minis ( like in THE REAL Italian Job film) had their gearbox located in the bottom of the sump and shared the engine oil.
Some of them are mighty noisey in the gears for a reason!

TX82FIAT · Post by **TX82FIAT** » Mon Aug 15, 2011 10:18 am

Lucas in the engine or in the differential is fine. I would not use it in the transmission. My two cents is that the GL1 that you can get from NAPA is best for the brass syncro rings. As an alternative you can try the redline GL5.

seabeelt · Post by **seabeelt** » Mon Aug 15, 2011 11:11 am

Here we go again!!!

wikkid · Post by **wikkid** » Mon Aug 15, 2011 1:27 pm

Just for people searching in the future, another source for GL-1 oil is Tractor Supply:
http://www.tractorsupply.com/hydraulic- ... l--0806600

So Cal Mark · Post by **So Cal Mark** » Mon Aug 15, 2011 9:35 pm

chemical engineers from both Castrol and Royal Purple have told me to use 40w motor oil in the tranny in place of GL1. Lucas isn't going to eat your synchros, but my experience with Lucas is (depending on the percentage of blend you use) is that you may have trouble shifting in cold weather until the oil warms up. What I like about the Lucas oil treatment is that is that the molecules stick together, so you have lubrication even if the car has been sitting for long periods.

124cso · Post by **124cso** » Tue Aug 16, 2011 10:04 am

Interstingly, I had a 125 in the 70s. It had the same 4 speed box (the 5th in a 124 is in that additional housing at the rear) and the manual for it says an EP oil for the diff and gearbox, 90 weight.

whiterabbit · Post by **whiterabbit** » Tue Aug 16, 2011 9:53 pm

OH LORD!!!!!! Oil opinions and ideas seem to bring out the dark side in everyone.

Kind'a like asking what's the best beer to drink.

Didn't put Lucas it the tranny, just GL1. I do run it in the engine and axle.

I run it in all my high mileage bikes too.

So Cal Mark · Post by **So Cal Mark** » Wed Aug 17, 2011 12:18 am

the only way to determine which beer is best is to try them all

124cso · Post by **124cso** » Wed Aug 17, 2011 7:45 am

So Cal Mark wrote:the only way to determine which beer is best is to try them all

But not French Beer ! Now that really does taste like (one would imagine) piss !

Out of curiosity, are there any members here based in Italy ? Or have family / friends in Italy ?
Reason for asking is - Are the "Fiat" branded oils listed in our handbooks and workshop manuals still available ex the Italian dealers ???

whiterabbit · Post by **whiterabbit** » Wed Aug 17, 2011 11:26 pm

Try them all? That's the best advice I've gotten all week!

Yea, Lucas makes your oil pretty sticky. I run it in bikes that use 50wt in the winter and 60wt in the summer. Roller bearing main and rod bearings, so low oil pressure is the norm. Bronze cam bushings too! I now run straight Valvoline racing 50wt (high zinc) year round with no death rattle.
Thanks all for your advice and comments.

LUCAS in the engine and tranny?

LUCAS in the engine and tranny?

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Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?

Re: LUCAS in the engine and tranny?