V8 Oil Quantity

[fuelleak]

2B571507. 2019 250 Pro XS 4S. Getting ready to do my 20 hr. oil change but my dealer still hasn't sent my Mercury owners manual. How much oil do I need to buy with filter change?

[tlf1058]

I don't have my book with me....but from memory it was 7 quarts of 10W30.

[howieranger]

You will need 7 quarts of 10w-30 FCW but do not fill it up to the top bead ( mine will smoke on startup when filled to the top mark). I find if the level is just to the last crosshatched block it doesn't smoke. It takes a long time for the oil level to settle and get a correct reading so be patient.

[fuelleak]

Thank you gentlemen..

[EuropeanAM]

You will need 7 quarts of 10w-30 FCW but do not fill it up to the top bead ( mine will smoke on startup when filled to the top mark). I find if the level is just to the last crosshatched block it doesn't smoke. It takes a long time for the oil level to settle and get a correct reading so be patient.

+1

The 10W30 Synthetic Blend Fourstroke Oil is an excellent (and the recommended) choice for this engine model.

[Sam378]

Do you have to change the engine oil after 20hours? I don’t see anything in the manual about that it only says every 100 hours

[howieranger]

You don't have to but it is cheap insurance, especially the lower unit oil.

[Sam378]

I just dropped my boat off today because I think I’m a victim of the not adjusted throttle so I told them to change the lower unit oil I’m at 15 hours and rule of thumb for me was always lower unit oil at the first 20 hours

[mikesxpress]

Mercury provides the maintenance schedule for LU and engine oil in the manual. IMO anything else is over kill.

[EuropeanAM]

Never once heard someone with an engine that bit the dust that wouldn't have gone back and done 1 more maintenance if it would have made a difference.

As stated many times- 20 hour service is NOT mandatory. It is however a wise investment in the longevity of your engine.