Originally Posted by maczilla23
Hello. I just bought a new boat on friday with a 190HP 4.3L. Took it to the lake today and checked the oil before running. It was a quart low so I dropped a quart of 5w30 car oil in it thinking nothing of it since it is a chevy motor.
After thinking about it I thought maybe that was a bad idea. Im going to be running the boat tomorrow and dont want to mess it up. Is it ok with a quart of 5W30 car oil in it or should I completely change the oil and start over. Id hate to ruin the engine right off the bat! Help would be appreciated!
The 5w30 oil will be ok, but not optimal. What year boat? What viscosity does your manual call for?
You can safely run the engine but you should change the oil when convenient to the recommended viscosity.