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Author Topic: Front suspension oil  (Read 4646 times)
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Posts: 89

« on: 10 February, 2014, 01:35:14 PM »

Not just for Aprilia owners but for all those with sliding pillars.

In recent times there have been a few comments in the Forum about oils for the front suspension.  It is years since I had my Lambda and I have no idea now what oil I was using.  Now I have an Aprilia which oil should I be using?  Earlier comments only make me more confused and there seem to be a wide variety of suggestions from Aprilia owners.  How about these?

90 lower and  20/50 upper. 
10/40 both upper and lower rather than 20/50
10-40 upper and lower
80/90 lower 20/50 upper.
Classic light top 50W bottom
Straight 90 both.
Straight 30 or 40 both.

The original instruction book suggests
Gargoyle A or Veedol medium 3 which were both straight 30.

Help!  Is there any majority recommendation??  What do you experts use nowadays and why?  I just wonder how many different ideas we will have.  Does climate make a difference?  Here it is a touch warmer than U.K. but this is NOT the Algarve which is six hours drive away.  Answers on a postcard well, no, on the Forum.
Rebel Poster
Posts: 999

« Reply #1 on: 10 February, 2014, 03:28:34 PM »

I firmly believe that you should use the thinnest oil which will stay where it's meant to be. My Lambda likes 10/40, but it does tend to leak out, so needs regular topping up. I would imagine using 90 oil, or anything anywhere near as thick, will damage the shock absorber valves, which are very thin spring steel.
Regards, John
Posts: 238

« Reply #2 on: 10 February, 2014, 09:06:23 PM »

For Augusta and Aurelia B10 I have "always" used SAE 30 and had planned to do same for Aprilia. Having said that, I bet I have used 10/40 or 20/50 at some time without appreciating any change in handling.

Brian Hands

1922 Hands Tourer
1934 Augusta standard saloon
1938 Aprilia S1 saloon
1953 Aurelia B10
1965 Flavia Sport
Posts: 456

« Reply #3 on: 10 February, 2014, 11:11:29 PM »

Hi there Mic
           Your research suggests to me that the choice of oil is not critical.
           For myself I keep things simple and use the same oil as I use in the engine---20-50 for top and bottom.
           Under normal driving conditions I doubt that the oil heats up very much so the benefit of a multi-grade is not really required and a        straight 30 grade would therefore give similar performance. However I see no disadvantage in using the more conveniently available oil that I use in the engine. I would argue strongly that there is certainly no merit in using anything different in the bottom.   
Posts: 373

« Reply #4 on: 11 February, 2014, 07:11:32 AM »

Following the Lancia instructions booklet, I use 10-40 oil for the top reservoir (unless 30 is available) and 800-90 for the bottom filler.

Andrea Nistri

Ardea S2
Appia S2
Fulvia GTE
Fulvia Sport 1.3 S
Fulvia Montecarlo
Fulvia Coupe 1.3 S
Permanent resident
Posts: 2285

« Reply #5 on: 11 February, 2014, 07:56:44 AM »

I cross referenced the original oils with the closest Penrite oils - all listed below:

I have done a few miles with the current set up and seems to work well

S1 Aprilia Cabrio, S2 Aprilia, S2 camioncino, S2 furgoncino, , R4 Sinpar, R4 Rodeo, '65 Mini Moke,R60 Tractor,R60 S, Moto Guzzi Ercole, Disco 3, Mini ALL4 JCW, Moto Guzzi Cardellino 63,Fulvia Berlina GT, 2019 Royal Enfield Himalayan,JTD Ypsilon - Mathilda
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« Reply #6 on: 12 February, 2014, 08:19:40 AM »

always used 20/50 in the appia augusta etc with no problems

1935 augusta lusso (chugga)
1935 belna saloon
1935 augusta lusso
1938 ardenne
1939 aprilia lusso
1958 appia s2
1963 appia s3 
195? appia camioncino
1972 fulvia 1600HF
1976 fulvia coupe
194? ardea SUV  "THE BEAST!!!"
Posts: 89

« Reply #7 on: 01 March, 2014, 03:29:41 PM »

And the winner is....  from nine opinions and in order of popularity -

Upper    Lower-

10/40     10/40                       Three and a half votes (half is a suggested alternative for upper of 10/60).

30            30                       Two and a half votes (half is for one alternative to 10/40 upper).
                                            This of course is same as the factory recommendation which was either Gargoyle Mobiloil A or Veedol Medium 3, both straight 30.

20/50      20/50                       Two votes   

Thickest oil mentioned is by two people which is 90 for lower.  Apart from that in general people keep to the thinner side and two acknowledged experts suggest 10/40 with the comment that 20/50 is just a touch on the thick side.  So I shall follow that recommendation.

Interesting that all but two people use the same upper and lower.
Senior Member
Posts: 183

« Reply #8 on: 01 March, 2014, 10:04:39 PM »

A late entry!

I use SAE 20 or 30 in the top and SAE 50 in the bottom. My theory, based on all the advise from the experts down here, is in the bottom you just need something that will stay in there, lighter oils tend to splash out the top, it just has to lubricate the king pin and the bottom thrust bearing that the main spring sits on. In the top, as well as lubricating all the sliding parts, the oil controls the damping, so use whatever works best for your car.

Make sure when you fill the top for the first time you work the piston up and down to extract all air from the lower chamber.


1937 1st series Aprilia Berlina
Nissan X-Trail T31 TS
1920 P & M 3 1/2hp {FOR SALE}
John Deere LX188
Posts: 89

« Reply #9 on: 02 March, 2014, 11:46:40 AM »

Thank you, Noel.  That makes sense and I shall consider all possibilities but nothing too thick at the top end.

Incidentally, slightly off topic, does anyone have any experience/knowledge of an additive called Metal Lube - Anti friction engine treatment.  My fettler swears by it but new to me and I am cautious on these things.
Posts: 448

B20 s.2, Appia C10 unrestored

« Reply #10 on: 02 March, 2014, 08:16:41 PM »

Another late entry -

20 or 30 weight straight oil up top, 90 below.
Some have suggested oil standards have changed and that today's 20 is too thin, and recommend using 30.

It seemed Lancia was changing  oil standards during the life of the Aurelia, per the following chart. Work in progress.

* L Aurelia lubricants.pdf (28.97 KB - downloaded 267 times.)
« Last Edit: 02 March, 2014, 08:19:01 PM by GG » Logged

B20 s.2, Appia C10 unrestored
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