Mercruiser oil recommends

[jaylamb]

Greetings,I have an 86 Cobia with a 140hp 3 litre 4cylinder Mercruiser.The motor tag states 30 wt. for the engine oil.I know back then that was the standard but muti weights have come along ways,I notice Merc's Quicksilver line has a 25w40 they state on the can works in all Mercruiser motors.Just wonder what some of you guys are running for motor oil in your motors?

 

[dubs283]

Re: Mercruiser oil recommends

either 30W or 25W40 will be sufficient for your engine

i use 25W40

 

[stonyloam]

Re: Mercruiser oil recommends

i use 25W40

Me too!

 

[jaylamb]

Re: Mercruiser oil recommends

Thanks

 

[Aloysius]

Re: Mercruiser oil recommends

DO NOt use an "energy efficient" oil with the "starburst" logo on it. These oils contain no additives to protect flat tappet cams. most modern engines use roller lifters, and the ZDDP (zinc) additive that usedta protect lifters is omitted, as it contaminated catalytic converters.