If Mercury says to use 5-30, use 5-30.
Sorry ne7800 but just because the oil has a SAE rating of 5w-20 does not make it a synthetic.
Also, both Honda and Ford suggest 5w-20 oils, but that thin of a viscosity has proved to be not good in the warmer climates.
This is a link to a synthetic oil manufacturer who I had saved years ago because of the breakdown of SAE ratings and a good overall discription of the refining process.
Gets a little technical, but again has covered all the bases concerning regular and synthetic oils.
Sorry ne7800 but just because the oil has a SAE rating of 5w-20 does not make it a synthetic.
Also, both Honda and Ford suggest 5w-20 oils, but that thin of a viscosity has proved to be not good in the warmer climates.
This is a link to a synthetic oil manufacturer who I had saved years ago because of the breakdown of SAE ratings and a good overall discription of the refining process.
Gets a little technical, but again has covered all the bases concerning regular and synthetic oils.
....This is a link to a synthetic oil manufacturer who I had saved years ago ....
Link? What link? I don't see no stinkin' link!![]()
Yes, 5-20 or 5-30 whatever your oil fill cap says.
The Triton (4.6L) engines DO NOT like thick oil.
As soon as our fleet of vehicles are out of warranty we swap them to 15w40 and never have any oil related problems like we do leaving them on 5w30