Oil comparison
 

I've looked everywhere and cant find it. There was a link floating around that compared different brands of oil, the breakdown and viscosity after use and which held up the best. Does anyone happen to have a link?

Hydrocruisers old thread? Mobil 1 15-50 is all run. I tore down my engines after 12 yrs of abuse this winter and the bearings are pristine. Even with a cracked block and 3 qts of water in the oil for 1/4 of the season.

https://www.offshoreonly.com/forums/...brication.html

I'm with Rookie. Mobil 1 is all I run as well and the results have been outstanding!

X 3 on Mobil 1 15w-50

x4.......

Lost an oil filter (split) when my motors were in my old boat. After a couple of miles at 6000 rpms, looked down and no oil pressure. Opened the hatch - what a mess. Back to the marina, cleaned the bilge, new filter, filed it up again, and off we went. Years later, all we saw in the tear down was a little scuffing on a couple bearings, Since then, I always used it & see no reason to use anything else. My engines also had a slight bit of reversion.........so I think this protected pretty good.

x5!

type ( hydrocruiser )or (sandisk in the search column
)all the oil fun youll ever need

Mobil 1 15w - 50, been using it for years

I'm in, Mobil 1 15-50 for big blocks and Mobil 1 10-40 4t for my super charged seadoos and canam atv's. If the weather is cold I run the 10-40 in the jetboat

Been boating 35 years. I have owned 6 4-stroke boats all with marinized car engines (Mercruiser V-8 or Mercury Racing V-8) two of which I still own. I only use Mercruiser 25W-40, originally the dino was all they had but now I use the semi-synthetic. I change the oil and filters no more than every 25 hrs on the Racing engines and every 50 hours on the standard ones. I've had two outboard 2-cycle boats one of which I still own. I only use Quicksilver Premium Plus synthetic blend. Never, ever an oil related issue. Ever. Why would the manufacturer shoot themselves in the foot.

BTW there are numerous oil threads on OSO with advice all over the map. Just use a quality multigrade with a low startup viscosity (say 10-25W) and with operating temperature viscosity say 40W. Do NOT use single grade except in the summer. In any event it is always best to pick a quality oil and stick with it.