mercury marine engine oil

[#1newbee]

I bought a 1969 starcraft with a 120hp mercury marine engine. I have searched several sites and found that manuals for that year are hard to find. What I need to know right now is what oil do I use? The fill cap says Kiekheafer formula 4. Defenantly a newbee question I'm not new to engine maintenance, just boats.

 

[sethjon]

Re: mercury marine engine oil

I bought a 1969 starcraft with a 120hp mercury marine engine. I have searched several sites and found that manuals for that year are hard to find. What I need to know right now is what oil do I use? The fill cap says Kiekheafer formula 4. Defenantly a newbee question I'm not new to engine maintenance, just boats.

I use 10/40, but most guys will tell you to use a straight 30 or 40 wt. Any of them will fine.

 

[#1newbee]

Re: mercury marine engine oil

Thank you for the tip sethjon.

There is no differance between engine oil and marine engine oil?

 

[Matt89GT]

Re: mercury marine engine oil

yet ANOTHER oil thread, Buddy use what ever oil you want from wolfs head brand from the dollar store to super tech at wal mart, as long as you change it you will be fine, was kidding on thee dollar general brand oil however use what ever you want and you will be fine.

 

[#1newbee]

Re: mercury marine engine oil

that's what i wanted to hear. However, as with all my other engines, all i need now is time to change it.

 

[45Auto]

Re: mercury marine engine oil

Seems like almost everyone around here with an I/O runs Mobil 1 20W-50 from Wal-Mart, $20/5 quart jug, change it once a year.

Mercruiser oil recommendations below:

 

[#1newbee]

Re: mercury marine engine oil

Thanks 45Auto. I found a link on another thread,from a new mercruiser service bulletin, that showed that chart but i coudn't read it very well. I think I'm on my way to town and get this thing ready.

 

[HT32BSX115]

Re: mercury marine engine oil

There is no differance between engine oil and marine engine oil?

Technically there is.

Read the following if you are interested.

http://www.nmma.org/certification/programs/oils/fc-w.asp

Otherwise use what ever is on sale at Walmart.......

 

[Howard Sterndrive]

Re: mercury marine engine oil

Kiekheafer formula 4.

that was a straight 30

the cheapest straight 30 you can find today, will be WAY better than what they had in 1969

 

[blueyecb]

Re: mercury marine engine oil

i just put a used 3.0 in my boat an used harley 20/50 syn in it an seems to work fine ....

 

[Brentathon]

Re: mercury marine engine oil

My opinion......the type or brand of oil has less of an impact to a marine engine's life, than most other things. Corrosion, cooling problems, etc.....usually kill boat engines. Engines should run fine with standard/generic "dinosaur oil".