Mike, there are SAE ratings for oil. Most modern oils have ratings that supercede the ratings of the oil for when the boat/engine was built. I've only ever run Amsoil HD & Marine Diesel synthetic 15w40 in my 3HM35F. No problems.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Jul 23, 2017 11:45 AM, "Hoyt, Mike via CnC-List" <cnc-list@cnc-list.com> wrote: I had my brother pick up 15w40 for me last week. Changed oil today and when old oil drained realized he bought synthetic 15w40. Have outing today and no time to get regular oil. Plan to drain and change later this week to non synthetic Is this an issue? Yanmar 3gm30f _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
