what oil for mercrusier v6 4.3 1989

[ianmccabe3]

hi i have a 1989 searay with a v6 4.3 engine and want to change the oil and filter
trying to find out what oil it is meant to have
hope someone can help
thanks
ian

 

[Thepipdoc]

I changed my 1998 Mercruiser 4,3l oil and filter last week and I used the only oil recommended by Merc and that's "Quicksilver 4 Cycle Marine Oil", It's a 25-40w multigrade oil.
You can pick this up at any chandlers. for about £23.00 for a 4litre(approx) bottle.

 

[Thepipdoc]

............ by the way, mine is a 1998 Sea Ray!

 

[hlb]

Any old oil from halfords will be ok. But cheaper from other souses.

 

[mont]

fwiw,
As per recent articles in various boating / sailing mags do make sure you use the correct oil as per the 'full' spec by maker - not just the lube rating. Lots of the modern / new oils have lots of additives / detergents to react with the things the modern / new engines produce. Wrong oil spec or using a fancy new brand of oil has produced alarming and expensive problems.
At your age of engine it is likely that a very simple / old type / cheap oil will be the correct spec - read the fine detail not just the lube spec.

 

[lovezoo]

Here is the recommended list of oils from Mercruiser:

http://www.mercurymarine.com/serviceandwarranty/mercruiserfaqs/fueloil.php#1124

As you only need to change the oil once a year (unless you are doing lots of hours) you may as well use the Quicksilver oil as suggested, rather than trying to save a few pennies by getting something cheaper from a supermarket.