1997 Mercruiser 454 Oil Recommendation

[JDR15467]

Looking for oil recommendation for a 1997 Mercruiser 454 Carb. Engine. The engine only has about 110 hours (Guy before me did not use it), and looking for alternatives to the Merc. 25w-40 due to availability. Manual recommends 40W or 30W if not using the Merc. oil. Boat is used from May to Sept. (70 deg.+), and about 30 hours per year.

Also, if you have a non-Merc filter recommendation, please let me know.
Thanks

 

[spasm3]

rotella 15w 40. Amsoil also makes a heavy duty 15w40 diesel/marine oil, i might try that.

 

[addyguy]

Any 15w40 HDEO.

 

[SteveSRT8]

due to the nature of service the Amsoil is a GREAT choice. Use their filter and change once per season.

 

[Schmoe]

Penz. 15w40.

 

[JDR15467]

Are the 15W40 oils Diesel type? And if so, no problems using them in the marine gas engines then?

Thanks for the advice.

 

[spasm3]

The amsoil diesel marine oil is sl rated for gas engines also.

 

[Steve S]

Any of the esay available HDEOS as mentioned . No need to waste your $$$ on syn oil.

 

[Steve S]

Originally Posted By: JDR15467
Are the 15W40 oils Diesel type? And if so, no problems using them in the marine gas engines then?

Thanks for the advice.
Though called by many Diesel oil. The oils are properly called HDEO oils [Heavy Duty Engine Oils] which are made to perform in the most severe commercial operating conditions in diesel and gasoline engines . Those are the oil commercial maritime companies use in ther high speed diesel and gasoline engines it is the best choice of oil for your engine. "Real" Diesel oils have different additive etc.formulations than the HDEOs.

 

[SteveSRT8]

Originally Posted By: Steve S
Any of the esay available HDEOS as mentioned . No need to waste your $$$ on syn oil.


Just so the op knows... this is not proven fact, simply opinion.

 

[Steve S]

Originally Posted By: SteveSRT8
Originally Posted By: Steve S
Any of the esay available HDEOS as mentioned . No need to waste your $$$ on syn oil.


Just so the op knows... this is not proven fact, simply opinion.

I have ran HDEOs in my boats with great results The engines look great at teardown [7,500 RPM big blocks] and all the commercial maritime companies I have been to run one of the big 3 HDEOS in their high speed diesel and gasoline boats so that is good enough for me.

 

[Steve S]

Originally Posted By: SteveSRT8
due to the nature of service the Amsoil is a GREAT choice. Use their filter and change once per season.
Just so the op knows... this is not proven fact, simply opinion

 

[another Todd]

Originally Posted By: addyguy
Any 15w40 HDEO.


+1