View Full Version : Will Mobil 1 15W50 be safe ?

09-05-2009, 12:52 PM
I was unable to find the regular Quicksilver oil I use on my 1987 Prostar 190 this morning & got Moble 1 15W50 & put it in the engine before reading an old container of Quicksilver that is 25W40. Is 15W50 safe or do I need to change my oil again?:(

09-05-2009, 01:20 PM
I'm not an engine expert, but I'd have no problem running the Mobil 1 until the next oil change in my boat, despite the difference in viscosity.

Run it and have a good time, IMHO. No worries.


09-05-2009, 01:28 PM
I always use Mobil1 15w-50.

09-05-2009, 02:02 PM
Thanks, I really did not want to drain the oil again. Now I won't worry!8p

09-07-2009, 10:11 AM
Just tell us how many hours you put on that engine in the last 3 years...:rolleyes:
Get the cash out of under your mattress and buy a new boat!!!

09-10-2009, 10:29 PM
Scott ,Francois & I are buying Matt's boat in Owego,the one Desiree damged the prop on.The 87Prostar will be for sale in the spring!