sae 40 oil good to use in 4.3 v6?

[jellynuts69]

bought a 1989 rinker 4.3 v6 last spring, in the fall i put vavoline sae40 the owners manual had three different types to use just want to make sure i.m ok

 

[JustJason]

Re: sae 40 oil good to use in 4.3 v6?

eagh... straight 40 is a little thick. Especially on those cold morning starts. Valvoline makes a 20-40HD that will work a little better for you.

 

[QC]

Re: sae 40 oil good to use in 4.3 v6?

Welcome aboard jellydude . . . This topic has been seriously beat to death here. Do a search for oil here and you'll get reading for a month The best reply to this is to follow the owners manual for your manufacturer which I assume is Mercruiser, but may be an OMC or Volvo. Generally, Merc recommends a Marine Grade 25W40 . . .

 

[jellynuts69]

Re: sae 40 oil good to use in 4.3 v6?

thanks

 

[rockyman]

Re: sae 40 oil good to use in 4.3 v6?

i use 30wt in my merc 1978 L6 and have no problems with it

 

[180shabah]

Re: sae 40 oil good to use in 4.3 v6?

40 weight is fine above 50 deg, but as mentioned above, there are better choices available these days.

 

[mrmushroomman]

Re: sae 40 oil good to use in 4.3 v6?

I use what is recommended in my manual and that is mercs 25w40. Costs about $5.00 a quart. In my 1984 runabout i used straight 30w because of the motors age.

 

[mthieme]

Re: sae 40 oil good to use in 4.3 v6?

I run 30HD in my 4.3.
I recall seeing some multi-grades in the manual (not handy at the moment) for colder climates.