Leg oil?

[Solitaire]

I know that this question must have been asked a 1000 times, but I could not find the answer via search. What is the oil I put into my VP 290 leg? Ta ever so and sorry to be a pain!!!

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[DavidJ]

Be careful because there was a changeover to sythetics about a decade or less ago. If yours is duoprop then no problem you can use rip off price Volvo Synthetic oil or Shell Spirax 75W/90. If single prop it could be either dependant on serial no.
David

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[cngarrod]

Hi David,

Best you sit down - £17 / litre and you need just under 3 ltr's... Volvo fully synthetic oil, sold in 1 ltr bottles...

Ouch!

Question posted here a few weeks ago about alternatives... but on one came up with alternatives for the duo prop ( which i think you have?)

Cheers,

C

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[byron]

<font color=blue>Damn! I read the header too quickly and read it as "leg over" now I'm disappointed to find out the posting is about outdrives.

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[Solitaire]

Just wishful thinking Byron? Dsylexia can have that eefcect!! I know

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[Solitaire]

Yep! Got duo prop! Thnaks for the scare!!

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[Guest]

Silly Question but why do we change the oil in the leg?

Does it wear out? - what in 50 - 100 hours ?

Get old ? - there is no use-by date on the can, anyway isn't it millions of years old already ?

or what?



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[jfm]

Re: Leg oil? reason to change

Entirely agree. It is changed too often. Some car diffs running on sythetic are sealed for life. Main reason to change it annually is to check seals - oil looks milky if seals have gone. But this check can be done by draining a spoonful, not the whole lot

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[Dave_Snelson]

Why change the oil?

The reason is two-fold. Firstly to check seals and bearings and any water ingress leaks. Secondly because all multi-grade oils (i.e. 15/40 or 75/90) get their ability to change their grade under temperature or pressure, because they contain a substance called a "styrene-butadyne co-polymer". This little chap is a polymer that "grows" under pressure or temperature increase, so thickening the oil. It is eventually broken with use - the long polymer chains break up.

As too how long this takes, I haven't the foggiest. I would imagine that changing the oil every other season should do the trick.

All E&OE you understand

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[Solitaire]

I decided to ask RK Marine who serviced the leg last year - answer Volvo gear oil. £6/litre. However the newer generation of 290 legs (DP series!) have to use the synthetic stuff. Question now solved. Thanks all for input anyway.

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